Ph.D., The University of Tokyo

光計測

Optical frequency comb

Ultrafast spectroscopy

Solid state physics

Optical vortex

Nanotechnology/Materials, Optical engineering and photonics

Natural sciences, Semiconductors, optical and atomic physics

Nanotechnology/Materials, Applied physics - general

Manufacturing technology (mechanical, electrical/electronic, chemical engineering), Measurement engineering

Nov. 2023 - Present
The University of Electro-Communications, 情報理工学研究科, 准教授

Oct. 2024 - Mar. 2028
JSTさきがけ研究員（兼任）

Nov. 2018 - Oct. 2023
The University of Electro-Communications, 情報理工学研究科, Assistant Professor

Aug. 2015 - Mar. 2020
JST,ERATO美濃島知的光シンセイサイザプロジェクト, 研究員

Oct. 2016 - Oct. 2018
The University of Electro-Communications, 情報理工学研究科 美濃島研究室, Research Assistant Professor

Aug. 2015 - Sep. 2016
The University of Electro-Communications, 情報理工学研究科 美濃島研究室, Researcher

Apr. 2015 - Jul. 2015
東京大学, 理学系研究科 山本研究室, 日本学術振興会特別研究員(PD)

Apr. 2013 - Mar. 2015
東京大学, 物性研究所 末元研究室, 日本学術振興会特別研究員(DC2)

Mar. 2015
University of Tokyo, Graduate School of Science, Department of Physics

Mar. 2009
University of Tokyo, Faculty of Engineering, Department of Aeronautics and Astronautics

Apr. 2024 - Present
レーザー学会年次学術講演会 プログラム委員

Apr. 2024 - Present
日本光学会年次学術講演会（OPJ）実行委員

Oct. 2019 - Present
専門委員, 超高速光エレクトロニクス特別研究専門委員会

Apr. 2018 - Present
NISTEP専門調査員

Oct. 2021 - Mar. 2024
応用物理学会講演会プログラム委員

Apr. 2022 - Nov. 2022
日本光学会年次学術講演会（OPJ）プログラム委員

Apr. 2021 - Oct. 2021
日本光学会年次学術講演会（OPJ）実行委員

Aug. 2019 - Apr. 2021
OPIC運営委員（ALPS国際会議運営幹事）

Apr. 2023
デュアル光コムを駆使した新分光技術の研究
令和5年度 文部科学大臣表彰 若手科学者賞, 浅原 彰文

May 2019
デュアルコム分光法の磁気光学特性評価への適用拡大
レーザー学会第39回年次大会優秀論文発表賞, 浅原 彰文

Mar. 2019
デュアル光渦コム分光による角度軸情報の精密干渉計測
第45回応用物理学会講演奨励賞, 浅原 彰文

Oct. 2018
Development of ultrafast time-resolved dual-comb spectroscopy
2018年度光学論文賞, A. Asahara;K. Minoshima

Nov. 2016
デュアルコムを用いた多次元超高速分光の固体物性への応用
第2回OPJ優秀講演賞, 浅原 彰文
Japan society

Jul. 2010
PSS Young Researcher Awards（EXCON10 Best Poster Awards）, Akifumi Asahara
International society

Remote fiber sensing by quantum spectroscopy using frequency entangled photons via a real-world fiber network
Masahiro Ishizeki; Tomoya Okita; Akifumi Asahara; Ryosuke Shimizu; Kaoru Minoshima
Quantum Sensing and Nano Electronics and Photonics XXI, SPIE, 86-86, 21 Mar. 2025
International conference proceedings

Comprehensive study of the luminescence properties of elemental metals
Tohru Suemoto; Shota Ono; Akifumi Asahara; Tsuyoshi Okuno; Takeshi Suzuki; Kozo Okazaki; Shuntaro Tani; Yohei Kobayashi
Physical Review B, 27 Jan. 2025
Scientific journal

Laser-scanning optical-frequency-comb microscopy for multimodal imaging
Shimpei Kajiwara; Eiji Hase; Shota Nakano; Keishiro Ootani; Tomoya Okabe; Hidenori Koresawa; Akifumi Asahara; Kazumichi Yoshii; Hirotsugu YAMAMOTO; Kaoru Minoshima; Takeshi Yasui; Takeo Minamikawa
Japanese Journal of Applied Physics, IOP Publishing, 29 Nov. 2024, Peer-reviwed, Abstract

We introduce a laser-scanning optical microscopy technique that employs optical-frequency-comb (OFC) lasers. This method facilitates multimodal spectroscopic imaging by analyzing interferograms produced via a dual-comb spectroscopic approach. Such interferograms capture comprehensive light information, including amplitude, phase, polarization, frequency, and time of flight information, enabling multimodal imaging from a single measurement. We demonstrate the potential of this technique across several spectroscopic imaging applications.
Scientific journal

Quantum Spectroscopy using 2D Spectrum of Telecom-band Frequency Entangled Photons for Real-World Fiber Network Applications
Masahiro Ishizeki; Yuki Okura; Akifumi Asahara; Ryosuke Shimizu; Kaoru Minoshima
CLEO-PR2024, Fr2E-2, 09 Aug. 2024, Peer-reviwed
International conference proceedings

Time-Frequency Characterization of Ultrafast Quantum Entangled Biphotons Through Optical Frequency Comb Based Two-Color Asynchronous Optical Sampling
Prasad Koviri; Takahisa Kuwana; Hajime Komori; Takashi Kato; Akifumi Asahara; Thomas R. Schibli; Ryosuke Shimizu; Kaoru Minoshima
CLEO-PR2024, Th2C-3, 08 Aug. 2024, Peer-reviwed
International conference proceedings

Development of an All-polarization-maintaining Tri-comb Fiber Laser with a Mechanicalsharing Configuration
Kosei Nagao; Takahisa Miura; Takashi Kato; Akifumi Asahara; Kaoru Minoshima
CLEO-PR2024, P1-122, 06 Aug. 2024, Peer-reviwed
International conference proceedings

Coherent-Controllable Vis-NIR Dual-Comb Spectroscopy with a High-Power, High-Coherence Fiber Comb System
Ruichen Zhu; Haochen Tian; Takashi Kato; Akifumi Asahara; Kaoru Minoshima
CLEO-PR2024, Tu2E-3, 06 Aug. 2024, Peer-reviwed
International conference proceedings

Tomographic Imaging with Broadband Optical Noise Cancelling Using Antiphase Pulse by Phase-controlled Optical Frequency Comb
Takashi Kato; Keito Hino; Yasuhisa Nekoshima; Akifumi Asahara; Kaoru Minoshima
CLEO-PR2024, Mo4E-3, 05 Aug. 2024, Peer-reviwed
International conference proceedings

Practical and High SNR Mid-infrared Dual-comb Spectroscopy Based on Bidirectional Dualcomb Er Fiber Laser
Akifumi Asahara; Gakuto Fukawa; Takayuki Shimizu; Takashi Kato; Kaoru Minoshima
CLEO-PR2024, Mo2E-3, 05 Aug. 2024, Peer-reviwed
International conference proceedings

Broadband High-Power Dual-Comb System covering Visible to Near-IR Region
Ruichen Zhu; Haochen Tian; Runmin Li; Sida Xing; Thomas R. Schibli; Takashi Kato; Akifumi Asahara; Kaoru Minoshima
CLEO2024, SF2P.5, 10 May 2024, Peer-reviwed
International conference proceedings

Dual-comb Fiber Laser-based Practical Mid-infrared Dual-comb Spectroscopy via Real-time and Long-term Coherent Averaging
Akifumi Asahara; Gakuto Fukawa; Takayuki Shimizu; Takashi Kato; Kaoru Minoshima
CLEO2024, SF2P.4, 10 May 2024, Peer-reviwed
International conference proceedings

Measurement of detailed single-photon ultra-fast pulse characteristics by asynchronous optical sampling using a dual-wavelength combs
Hajime Komori; Prasad Koviri; Masahiro Ishizeki; Haochen Tian; Thomas R Schibli; Takashi Kato; Akifumi Asahara; Ryosuke Shimizu; Kaoru Minoshima
ALPS2024, ALPS22-02, 25 Apr. 2024, Peer-reviwed
International conference proceedings

Quantum Spectroscopy using 2D Spectrum of Telecom-band Frequency Entangled Photons for Quantum Remote Sensing
Masahiro Ishizeki; Takeru Naito; Takahisa Kuwana; Akifumi Asahara; Ryosuke Shimizu; Kaoru Minoshim
ALPS2024, ALPS21-04, 25 Apr. 2024, Peer-reviwed
International conference proceedings

Development of a Simple and Stable All-Polarization-Maintaining Multi-Comb Source with a Mechanical-Sharing Configuration
Kosei Nagao; Takashi Kato; Akifumi Asahara; Kaoru Minoshima
ALPS2024, ALPSp2-36, 25 Apr. 2024, Peer-reviwed
International conference proceedings

High-Power and High-Coherence Fiber Comb System for Broadband Dual-Comb Spectroscopy in Vis–NIR Region
Ruichen Zhu; Haochen Tian; Runmin Li; Sida Xing; Thomas R. Schibli; Takashi Kato; Akifumi Asahara; Kaoru Minoshim
ALPS2024, ALPS18-03, 24 Apr. 2024, Peer-reviwed
International conference proceedings

Highly Sensitive and Practical Mid-infrared Dual-comb Spectroscopy using Dual-comb Fiber Laser with Long-term Coherent Averaging
Akifumi Asahara; Gakuto Fukawa; Takayuki Shimizu; Takashi Kato; Kaoru Minoshima
ALPS2024, ALPS18-02, 24 Apr. 2024, Peer-reviwed
International conference proceedings

Single-photon-level femtosecond time-resolved measurement by asynchronous optical sampling with dual-wavelength comb
Hajime Komori; Prasad Koviri; Masahiro Ishizeki; Haochen Tian; Thomas R. Schibli; Takashi Kato; Akifumi Asahara; Ryosuke Shimizu; Kaoru Minoshima
Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXIV, SPIE, 12 Mar. 2024
International conference proceedings

Ultrafast time-resolved single-photon detection using two-color comb based asynchronous optical sampling for quantum applications
Prasad Koviri; Hajime Komori; Masahiro Ishizeki; Haochen Tian; Takashi Kato; Akifumi Asahara; Ryosuke Shimizu; Thomas R. Schibli; Kaoru Minoshima
Quantum Sensing and Nano Electronics and Photonics XX, SPIE, 08 Mar. 2024
International conference proceedings

Dual-comb spectroscopy technique extended to spatial dimension
Akifumi Asahara; Kaoru Minoshima
光学（日本光学会機関誌）, 53, 2, 13-17, Feb. 2024
Research society

Single-photon level ultrafast time-resolved measurement using two-color dual-comb-based asynchronous linear optical sampling
Prasad Koviri; Hajime Komori; Haochen Tian; Masahiro Ishizeki; Takashi Kato; Akifumi Asahara; Ryosuke Shimizu; Thomas R. Schibli; Kaoru Minoshima
Applied Physics Express, IOP Publishing, 17, 2, 022001-022001, 01 Feb. 2024, Abstract

We demonstrated an ultrafast time-resolved measurement method operating at the single-photon level and employing a two-color comb-based asynchronous optical sampling (ASOPS) setup. We harnessed the two-color ASOPS photon counting approach to achieve long-term averaging of the ultralow intensity signal with a synchronized optical trigger signal, which minimizes residual timing jitter between the two combs. A pulse-width limited picosecond cross-correlation signal was successfully obtained with a power level of <1 photon/pulse. This approach enables the thorough study of ultrafast time-resolved detection of entangled photon pairs, quantum mechanical correlations in the time-frequency domain and finds wide use in optical quantum technology.
Scientific journal

Jones-Matrix Dual-Comb Spectroscopic Polarimetry
Hidenori Koresawa; Hiroki Kitahama; Eiji Hase; Yu Tokizane; Akifumi Asahara; Takeo Minamikawa; Kaoru Minoshima; Takeshi Yasui
CLEO 2024, Optica Publishing Group, 416, SM1G.7-SM1G.7, 2024, We propose an innovative approach that combines dual-comb spectroscopy with polarization control pulse sequences featuring distinct polarizations and time delays. This integration enables a detailed analysis of a sample's polarization response using the Jones matrix.
International conference proceedings

Observation of infrared interband luminescence in magnesium by femtosecond spectroscopy
Tohru Suemoto; Shota Ono; Akifumi Asahara; Tsuyoshi Okuno; Takeshi Suzuki; Kozo Okazaki; Shuntaro Tani; Yohei Kobayashi
Journal of Applied Physics, 134, 16, 28 Oct. 2023, Ultrafast luminescence in Mg was investigated in the infrared region, between 0.35 and 1.05 eV, and compared with the results for Al, using a luminescence upconversion technique. The luminescence intensity of these metals at 0.9 eV was higher than that of platinum with a similar surface roughness under the same excitation density. Although the Mg and Al are adjacent to each other in the periodic table and belong to “light metals,” having similar band structures, their luminescence spectra differ significantly. Pronounced peak structures were found for Mg and these were attributed to interband transitions within the conduction bands consisting of 3s and 3p orbitals overlapped on the intraband continuum, based on density functional theory band structure calculation. This result is in contrast to the interband luminescence in noble metals (Au, Ag, and Cu) under continuous-wave blue laser excitation, where the final states have been assigned to the d bands. A comparison of the spectra of rough and specular surfaces suggested that the surface roughness is not essential for mitigating wavenumber mismatch for intraband transitions. The luminescence from light metals, which are harmless to humans, will be attractive for biomedical applications.
Scientific journal

Broadband visible dual-comb spectroscopy using spectral stitching of nonlinearly generated light by waveguide-type PPLN crystals
Ryota Nagasaki; Ruichen Zhu; Takashi Kato; Akifumi Asahara; Kaoru Minoshima
APLS2023, PHTu-08, Sep. 2023, Peer-reviwed

Demonstration of Quantum Spectroscopy Method using 2D Spectrum of Telecom-band Frequency Entangled Photons towards Quantum Remote Sensing
Masahiro Ishizeki; Takeru Naito; Takahisa Kuwana; Akifumi Asahara; Ryosuke Shimizu; Kaoru Minoshima
APLS2023, HTu2-03, Sep. 2023, Peer-reviwed

Dual-comb spectroscopy with OAM modes for azimuth angle measurement
Akifumi Asahara; Kaoru Minoshima
FTS, Optica Sensing Congress, Optica Publishing Group, FTh2A.5, Aug. 2023, Peer-reviwed, By combining dual-comb spectroscopy and optical vortices, in-plane azimuth angle measurement was performed based on optical frequency combs. The measurable angle range was tailored by the topological charge number of the involved optical vortices.
International conference proceedings

Advanced circular dichroism measurement method with circular polarization switching dual-comb spectroscopy
R. Zhu; R. Nagasaki; T. Kato; H. Tian; A. Asahara; K. Minoshima
CLEO2023, Optica Publishing Group, SF3F.3, May 2023, Peer-reviwed, This study demonstrated well-controlled circular polarization switching dual-comb spectroscopy using coherent controllability of combs. Applicability of circular dichroism spectroscopy has been verified using circular polarizers. The developed method realizes high-sensitivity, high-speed, and broadband circular-dichroism characterizations.
International conference proceedings

Highly functional dual-comb spectroscopy with versatile optical phase control
K. Minoshima; A. Asahara
CLEO2023, STh4L.6, May 2023, Peer-reviwed, Invited

Coherent OAM modulation technique using versatile phase controllability of multi-optical-combs towards sensitive and rapid spatiotemporal spectroscopy
A. Asahara; R. Zhu; K. Minoshima
CLEO2023, Optica Publishing Group, SM3O.5, May 2023, Peer-reviwed, A new orbital angular momentum (OAM) modulation method is demonstrated based on the high phase controllability of multi-optical-combs. The developed method will lead to sensitive and rapid spatiotemporal spectroscopy using optical frequency combs.
International conference proceedings

Fundamental study on quantum remote sensing using nonlocal correlation of frequency entangled photon pair generated by ultra-short pulse train for fiber network
M. Ishizeki; T. Naito; T. Kuwana; A. Asahara; R. Shimizu; K. Minoshima
ALPS2023, ALPS26-04, Apr. 2023, Peer-reviwed

High precision and extended non-ambiguity range absolute distance measurement based on a coherently synthesized two-color electro-optic frequency comb
R. Li; H. Tian; T. Kato; A. Asahara; K. Minoshima
ALPS2023, Optica Publishing Group, ALPS25-02, Apr. 2023, Peer-reviwed, A low-noise coherently synthesized two-color EO comb is demonstrated and applied for distance measurement. Nanometer-precision absolute distance measurement within extended non-ambiguity range is realized by combining synthetic-wavelength interferometry and single-wavelength interferometry.
International conference proceedings

Ultrafast time-resolved single-photon detection method using two-color asynchronous optical sampling
P. Koviri; H. Komori; M. Ishizeki; H. Tian; T. Schibli; T. Kato; A. Asahara; R. Shimizu; K. Minoshima
ALPS2023, ALPS20-04, Apr. 2023, Peer-reviwed

Evaluation of solid-state physical properties by mid-infrared dual-comb spectroscopy based on a dual-comb fiber laser
G. Fukawa; J. Li; H. Tian; T. Kato; A. Asahara; K.Minoshima
ALPS2023, ALPS20-03, Apr. 2023, Peer-reviwed

Dual-comb spectroscopy for in-plane angle measurement using OAM vortex light
Akifumi Asahara; Seishiro Akiyama; Kaoru Minoshima
Optics Express, 31, 7, 11695-11704, 27 Mar. 2023, Peer-reviwed
Scientific journal

Dual-comb spectroscopy using free-running combs with digital phase correction
Haochen Tian; Runmin Li; Lukasz A. Sterczewski; Takeru Endo; Takashi Kato; Akifumi Asahara; Kaoru Minoshima
Ultrafast Optics 2023 - UFOXIII, Optica Publishing Group, 2023, We realize dual-comb spectroscopy measurements using two types of free-running optical frequency combs, independent Yb:fiber combs with 750-MHz repetition rate and mechanical sharing Er:fiber combs with 51-MHz repetition rate. Assisted by all-computational digital phase correction techniques, the absorption features of gaseous cells are characterized with sufficient signal-to-noise ratio.
International conference proceedings

Broadband coherently synthesized two-color electro-optic frequency combs with phase noise suppression
Runmin Li; Haochen Tian; Takashi Kato; Akifumi Asahara; Kaoru Minoshima
Applied Physics Express, IOP Publishing, 16, 1, 012005-012005, 28 Dec. 2022, Peer-reviwed, Abstract

A coherently synthesized 1550/1560 nm two-color EO comb is generated by modulating two continuous-wave lasers with common EO modulators and phase-locking their beat note. Compared with a single-color EO comb, the phase noise of comb modes that accumulated from the RF synthesizer is effectively suppressed in our coherently synthesized two-color EO comb. Besides, a broader spectrum is demonstrated in a coherently synthesized 1535/1560 nm two-color EO comb, with a 60-nm total spectrum span. The coherently synthesized two-color EO combs are expected to be applied in coherent communication, spectroscopy, absolute distance measurement, etc.
Scientific journal

Dual-comb spectroscopy using free-running mechanical sharing dual-comb fiber lasers
Haochen Tian; Runmin Li; Takeru Endo; Takashi Kato; Akifumi Asahara; Lukasz A. Sterczewski; Kaoru Minoshima
Applied Physics Letters, AIP Publishing, 121, 11, 211104-1-211104-6, 21 Nov. 2022, Peer-reviwed, We demonstrate balanced-detection dual-comb spectroscopy using two free-running mechanical sharing dual-comb fiber lasers assisted by an all-computational digital phase correction algorithm. The mutual coherence between the combs allows us perform mode-resolved spectroscopy of gaseous hydrogen cyanide by digitally compensating residual timing and offset frequency fluctuations of the dual-comb signal. Setting the repetition rate difference between the combs to 500 Hz (1.5 kHz) yields more than 2000 resolved radio frequency comb lines after phase correction in a 3-dB bandwidth centered at 1560 nm of wavelength. Through coadding the corrected interferograms, we obtain a single time-domain trace with a signal-to-noise ratio (SNR) of 6378 (13 960) and 12.64 (13.77) bits of dynamic range in 1 s of averaging. The spectral SNR of the coadded trace reaches 529 (585), corresponding to a figure of merit of SNR of 1.3 × 106 (1.4 × 106). The measured absorption spectrum of hydrogen cyanide agrees well with the HITRAN database.
Scientific journal, English

Distance measurement based on a coherently synthesized two-color EO comb towards high-accuracy air-refractive index self-correction
R. Li; H. Tian; T. Kato; A. Asahara; K. Minoshima
CLEO-PR2022, CThP6F-06, 04 Aug. 2022, Peer-reviwed
International conference proceedings, English

Comb-line resolved dual-comb spectroscopy using free-running mechanical sharing combs
H. Tian; R. Li; L. A. Sterczewski; T. Kato; R. Zhu; A. Asahara; K. Minoshima
CLEO-PR2022, CThP6F-03, 04 Aug. 2022, Peer-reviwed
International conference proceedings, English

A simple scheme for phase-sensitive dual-comb spectroscopy with mechanical-sharing dual-comb laser
T. Endo; H. Tian; A. Asahara; K. Minoshima
CLEO-PR2022, CThP6F-02, 04 Aug. 2022, Peer-reviwed
International conference proceedings, English

Circular polarization switching in dual-comb spectroscopy using coherent-controlled multi-comb pulses towards circular dichroism characterization
R. Zhu; A. Asahara; T. Kato; H. Tian; K. Minoshima
CLEO-PR2022, CThP6E-04, 04 Aug. 2022, Peer-reviwed
International conference proceedings, English

Mid-infrared dual-comb spectroscopy using bidirectional dual-comb fiber laser for greenhouse N2O gas detection
J. Li; A. Asahara; H. Tian; K. Yoshii; T. Kato; Y. Nakajima; K. Minoshima
CLEO-PR2022, CTuP6B-07, 02 Aug. 2022, Peer-reviwed
International conference proceedings, English

Quasi-real-time dual-comb spectroscopy with 750-MHz Yb:fiber combs
Haochen Tian; Runmin Li; Lukasz A. Sterczewski; Takashi Kato; Akifumi Asahara; Kaoru Minoshima
Optics Express, Optica Publishing Group, 30, 16, 28427-28437, 19 Jul. 2022, Peer-reviwed, We present quasi-real-time dual-comb spectroscopy (DCS) using two Yb:fiber combs with ∼750 MHz repetition rates. A computational coherent averaging technique is employed to correct timing and phase fluctuations of the measured dual-comb interferogram (IGM). Quasi-real-time phase correction of 1-ms long acquisitions occurs every 1.5 seconds and is assisted by coarse radio frequency (RF) phase-locking of an isolated RF comb mode. After resampling and global offset phase correction, the RF comb linewidth is reduced from 200 kHz to ∼1 kHz, while the line-to-floor ratio increases 13 dB in power in 1 ms. Using simultaneous offset frequency correction in opposite phases, we correct the aliased RF spectrum spanning three Nyquist zones, which yields an optical coverage of ∼180 GHz around 1.035 µm probed on a sub-microsecond timescale. The absorption profile of gaseous acetylene is observed to validate the presented technique.
Scientific journal, English

光コムの原理から最新の応用展開へ
美濃島薫; 加藤峰士; 浅原彰文
次世代センサ, 32, 1, 2-5, 01 Jul. 2022
Japanese

Low noise coherently synthesized two-color electro-optic frequency comb
R. Li; H. Tian; T. Kato; A. Asahara; K. Minoshima
CLEO2022, JW3B.98, 18 May 2022, Peer-reviwed
International conference proceedings, English

Quasi-real-time dual-comb spectroscopy based on 750-MHz Yb:fiber combs unfolding aliasing down-sampled spectra
H. Tian; R. Li; L. A. Sterczewski; T. Kato; A. Asahara; K. Minoshima
CLEO2022, JW3B.97, 18 May 2022, Peer-reviwed
International conference proceedings, English

Near-infrared dual-comb spectroscopy for direct characterization of optical responses in metamaterials
A. Asahara; A. Sugita; K. Minoshima
CLEO2022, SM3F.3, 16 May 2022, Peer-reviwed
International conference proceedings, English

Complex optical properties of sprit-ring resonator metamaterials characterized by near-infrared dual-comb spectroscopy
A. Asahara; A. Sugita; K. Minoshima
ALPS2022, ALPS17-04, 19 Apr. 2022, Peer-reviwed
International conference proceedings, English

Quasi-real-time dual-comb spectroscopy of acetylene using 750-MHz Yb:fiber combs
H. Tian; R. Li; L. A. Sterczewski; T. Kato; R. Zhu; A. Asahara; K. Minoshima
ALPS2022, ALPS16-05, 19 Apr. 2022, Peer-reviwed
International conference proceedings, English

A method of utilizing phase in spectroscopy using dual-comb laser
T. Endo; H. Tian; A. Asahara; K. Minoshima
ALPS2022, ALPS16-04, 19 Apr. 2022, Peer-reviwed
International conference proceedings, English

Broadband coherently synthesized two-color electro-optic frequency comb
R. Li; H. Tian; T. Kato; A. Asahara; K. Minoshima
ALPS2022, ALPS14-03, 19 Apr. 2022, Peer-reviwed
International conference proceedings, English

Application for mid-infrared dual-comb gas spectroscopy with bidirectional dual-comb fiber laser
J. Li; A. Asahara; H. Tian; K. Yoshii; T. Kato; Y. Nakajima; K. Minoshima
ALPS2022, ALPS14-02, 19 Apr. 2022, Peer-reviwed
International conference proceedings, English

Orbital angular momentum-dependent phase detection using single-pixel dual-comb spectroscopy towards versatile manipulation of optical vortex light-wave
A. Asahara; T. Adachi; S. Akiyama; K. Minoshima
CLEO:2021, STh1C.7, 13 May 2021, Peer-reviwed
International conference proceedings, English

Highly functional dual-comb spectroscopy for versatile physical property evaluation of solid samples
T. Adachi; R. Zhu; S. Akiyama; A. Asahara; Y. Odagiri; C. Ishibashi; S. Hatano; K. Minoshima
CLEO:2021, CM1C.1, 10 May 2021, Peer-reviwed
International conference proceedings, English

Optical phase spectral control of orbital angular momentum modes studied by dual-comb imaging spectroscopy
A. Asahara; T. Adachi; S. Akiyama; K. Minoshima
ALPS2021, ALPS-P-22, 20 Apr. 2021, Peer-reviwed
International conference proceedings, English

High-precision mutual control of two-color fiber combs
T. Hasegawa; Y. Kusumi; S. Sakuma; A. Asahara; Y. Nakajima; R. Shimizu; K. Minoshima
ALPS2021, ALPS-P-21, 20 Apr. 2021, Peer-reviwed
International conference proceedings, English

Sensitivity improvement in dual-comb spectroscopy by tailoring the phase-slip in the interference signals
R. Zhu; T. Adachi; A. Asahara; K. Minoshima
ALPS2021, ALPS-11-03, 19 Apr. 2021, Peer-reviwed
International conference proceedings, English

Computationally image-corrected dual-comb microscopy with a free-running single-cavity dual-comb fiber laser
Takahiro Mizuno; Yoshiaki Nakajima; Yuya Hata; Takuya Tsuda; Akifumi Asahara; Takashi Kato; Takeo Minamikawa; Takeshi Yasui; Kaoru Minoshima
Optics Express, The Optical Society, 29, 4, 5018-5032, 02 Feb. 2021, Peer-reviwed, Dual-comb microscopy (DCM), an interesting imaging modality based on the optical-frequency-comb (OFC) mode and image pixel one-to-one correspondence, benefits from scan-less full-field imaging and simultaneous confocal amplitude and phase imaging. However, the two fully frequency-stabilized OFC sources requirement hampers DCM practicality due to the complexity and costs. Here, a bidirectional single-cavity dual-comb fiber laser (SCDCFL) is adopted as a DCM low-complexity OFC source. Although the residual timing jitter in the SCDCFL blurs the image of a static object acquired by DCM, computational image correction significantly suppresses the image blur. Nanometer-order step surface profilometry with a 14.0 nm uncertainty highlights the computationally image-corrected DCM effectiveness. We further discuss a possibility to expand the computational image correction to a dynamic object and demonstrate its preliminary experiment. The proposed method enhances the DCM generality and practicality due to low-complexity OFC source.
Scientific journal, English

デュアルコム分光法による磁気特性の測定
小田切 雄介; 足立 拓斗; 浅原 彰文; 石橋 爾子; 波多野 智; 美濃島 薫
電子情報通信学会誌, 11, 1-5, 01 Nov. 2020
Japanese

detection of optical vortices with various topological charges using single-pixel dual-comb imaging
A. Asahara; T. Adachi; S. Akiyama; K. Minoshima
Frontiers in Optics / Laser Science, LM7F.4, 14 Sep. 2020, Peer-reviwed
International conference proceedings, English

Complex optical response measurement of solid material to external fields by dual-comb spectroscopy
T. Adachi; A. Asahara; Y. Odagiri; M. Shirakawa; M. Ishibashi; S. Hatano; E. Tokunaga; K. Minoshima
CLEO-PR:2020, C11F-2, 05 Aug. 2020, Peer-reviwed
International conference proceedings, English

Dual-comb-based asynchronous pump-probe measurement with an ultrawide temporal dynamic range for characterization of photo-excited InAs quantum dots
Akifumi Asahara; Yuto Arai; Tomohiro Saito; Junko Ishi-Hayase; Kouichi Akahane; Kaoru Minoshima
Applied Physics Express, IOP Publishing, 13, 6, 062003-062003, 01 Jun. 2020, Peer-reviwed
Scientific journal

Spatiotemporal Characterization of Optical Vortex Light-wave using Hyperspectral Dual-comb Imaging
Akifumi Asahara; Takuto Adachi; Seishiro Akiyama; Kaoru Minoshima
CLEO:2020, STu4N.6, 12 May 2020, Peer-reviwed
International conference proceedings, English

Optical combs and optical vortices combined for spatiotemporal manipulation of light and matter
Akifumi Asahara; Satoru Shoji; Kaoru Minoshima
arXiv, 2005.04705, 1-13, 10 May 2020
Scientific journal, English

Dual-comb spectroscopy of dispersion properties in solid-state optical response
T. Adachi; A. Asahara; Y. Odagiri; M. Shirakawa; M. Ishibashi; S. Hatano; H. Tokunaga; K. Minoshima
ALPS2020, ALPSp-32, 21 Apr. 2020, Peer-reviwed
International conference proceedings, English

Hyperspectral Spatial Phase Detection of Optical Vortices using Single-pixel Imaging and Dual-comb Spectroscopy
Akifumi Asahara; Takuto Adachi; Seishiro Akiyama; Kaoru Minoshima
ALPS2020, ALPSp-35, 21 Apr. 2020, Peer-reviwed
International conference proceedings, English

光コムによる材料物性評価技術の開発
美濃島 薫; 浅原 彰文; 近藤 健一; 王 月; 足立 拓斗
光学, 48, 11, 451-456, 01 Nov. 2019
Japanese

Coherent multi-comb pulse control demonstrated in polarization-modulated dual-comb spectroscopy technique
Akifumi Asahara; Kaoru Minoshima
Applied Physics Express, 12, 072014, 072014-1-072014-5, 28 Jun. 2019, Peer-reviwed
Scientific journal, English

Lock-in-detection dual-comb spectroscopy
Hidenori Koresawa; Kyuki Shibuya; Takeo Minamikawa; Akifumi Asahara; Ryo Oe; Takahiko Mizuno; Masatomo Yamagiwa; Yasuhiro Mizutani; Tetsuo Iwata; Hirotsugu Yamamoto; Kaoru Minoshima; Takeshi Yasui
OSA Continuum, 2, 6, 1998-2007, 12 Jun. 2019, Peer-reviwed
Scientific journal, English

Laser-scanning optical-frequency-comb spectromicroscopy
S. Nakano; T. Minamikawa; E. Hase; A. Asahara; T. Mizuno; H. Yamamoto; K. Minoshima; T. Yasui
2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019, Institute of Electrical and Electronics Engineers Inc., 01 Jun. 2019, Optical spectromicroscopy is widely used to visualize microscopic morphologies and functions by analyzing spectroscopic features of amplitude and phase information interacting with a sample. However, conventional spectromicroscopy generally employs either light amplitude or phase measurement due to the difference of optical setup of these two methods, limiting to observe optical properties of samples in a single observation. If simultaneous measurement of amplitude and phase spectra is enabled, it is possible to analyze more detailed information of samples based on such as complex refractive index, polarization characteristics, and so on.
International conference proceedings, English

Combination of lock-in detection with dual-comb spectroscopy
H. Koresawa; K. Shibuya; T. Minamikawa; A. Asahara; K. Minoshima; T. Yasui; Y.G. Soskind
Photonic Instrumentation Engineering VI, SPIE, 10925, 1A-1-8, 21 May 2019, Peer-reviwed
International conference proceedings, English

Orbital Angular Momentum-resolved Dual-comb Spectroscopy towards Topological Material Studies
Akifumi Asahara; Takuto Adachi; Yue Wang; Kaoru Minoshima
CLEO:2019, SI, SM2H.8, 06 May 2019, Peer-reviwed
International conference proceedings, English

Dual-comb Spectroscopy Technique for Magneto-optic Effect Measurements
Takuto Adachi; Akifumi Asahara; Yusuke Odagiri; Masayuki Shirakawa; Yue Wang; Chikako Ishibashi; Satoshi Hatano; Eiji Tokunaga; Kaoru Minoshima
ALPS2019, ALPS-P2-21, 24 Apr. 2019, Peer-reviwed
International conference proceedings, English

Development of Dual-Comb Faraday Effect Measurement Equipment
Yusuke Odagiri; Akifumi Asahara; Takuto Adachi; Masayuki Shirakawa; Yue Wang; Chikako Ishibashi; Satoshi Hatano; Eiji Tokunaga; Kaoru Minoshima
ALPS2019, ALPS-P2-22, 24 Apr. 2019, Peer-reviwed
International conference proceedings, English

Rapid Characterization of Orbital Angular Momentum Spectrum of Arbitrary Optical Vortex using Dual-comb Spectroscopy
Akifumi Asahara; Takuto Adachi; Yue Wang; Kaoru Minoshima
ALPS2019, ALPS-5-03, 22 Apr. 2019, Peer-reviwed
International conference proceedings, English

Improvement and quantitative evaluation of asynchronous optical sampling method using dual-comb towards semiconductor physics
Tomohito Saito; Akifumi Asahara; Kouichi Akahane; Kaoru Minoshima; Junko-Ishi Hayase
Optics InfoBase Conference Papers, OSA - The Optical Society, 2019, 2019
International conference proceedings, English

Spatially scanning dual-comb spectroscopy for precise measurement of refractive index and thickness profiles of solids
Yue Wang; Akifumi Asahara; Ken-ichi Kondo; Kaoru Minoshima
CLEO-PR:2018, OSA, W4F.7, 01 Aug. 2018, Peer-reviwed
International conference proceedings, English

Development of all-fiber-type dual-comb spectrometer
Y. Wang; A. Asahara; K. Kondo; K. Minoshima
レーザー研究, 46, 7, 385-389, 20 Jul. 2018, Peer-reviwed
Scientific journal, Japanese

Scan-less confocal phase imaging based on dual-comb microscopy
Eiji Hase; Takeo Minamikawa; Takahiko Mizuno; Shuji Miyamoto; Ryuji Ichikawa; Yi-Da Hsieh; Kyuki Shibuya; Katsuya Sato; Yoshiaki Nakajima; Akifumi Asahara; Kaoru Minoshima; Yasuhiro Mizutani; Tetsuo Iwata; Hirotsugu Yamamoto; Takeshi Yasui
Optica, OSA - The Optical Society, 5, 5, 634-643, 20 May 2018, Peer-reviwed
Scientific journal, English

No-scanning 3D image detection with sum-frequency generation of optical frequency combs
Y. Tanaka; T. Kato; M. Uchida; A. Asahara; K. Minoshima
ALPS2018, ALPS7-I2-3, 24 Apr. 2018, Peer-reviwed
International conference proceedings, English

Simultaneous measurement of refractive index and thickness profiles of solids based on dual-comb spectroscopy
Y. Wang; A. Asahara; K. Kondo; K. Minoshima
ALPS2018, ALPS7-I2-5, 24 Apr. 2018, Peer-reviwed
International conference proceedings, English

Metrological Applications Using Coherent Controllability of Optical Combs
Akifumi Asahara; Kaoru Minoshima
LSC2018, LSC, Apr. 2018, Peer-reviwed, Invited
International conference proceedings, English

Use of lock-in detection in dual-comb spectroscopy
Hidenori Koresawa; Kyuki Shibuya; Akifumi Asahara; Takeo Minamikawa; Kaoru Minoshima; Takeshi Yasui
Optics InfoBase Conference Papers, OSA - The Optical Society, 2018, 2018, We present a method to selectively measure a mode-resolved spectrum of optical frequency comb at a specific frequency by introducing a lock-in detection in dual-comb spectroscopy.
International conference proceedings, English

High-resolution NO-scanning 3D image detection using sum-frequency generation of chirped optical frequency combs
Yurina Tanaka; Takashi Kato; Megumi Uchida; Akifumi Asahara; Kaoru Minoshima
Optics InfoBase Conference Papers, OSA - The Optical Society, 2018, 2018, No-scanning 3D imaging with 3-µm depth accuracy was demonstrated with optical frequency combs using a 2D color-image detection method with a spectral filter pair. No significant image degradation due to nonlinear optical detection was observed.
International conference proceedings, English

Coherent spatiotemporal phase control by combining optical frequency combs and optical vortices
Akifumi Asahara; Satoru Shoji; Ken-ichi Kondo; Yue Wang; Kaoru Minoshima
Optics InfoBase Conference Papers, OSA - The Optical Society, 2018, STu4P.3, 2018, Peer-reviwed, “Optical vortex comb“ is proposed, that enables coherent spatiotemporal phase control by combining optical frequency combs with optical vortices. The applicability is demonstrated through experiments on optical ring lattice control and optical tweezers.
International conference proceedings, English

Multi-optical comb metrology using relative envelope phase control and demonstration for arbitrary polarization modulation
Akifumi Asahara; Kaoru Minoshima
arXiv, 1710.06098, 17 Oct. 2017
Scientific journal, English

光コムによる光波の時間軸制御と物性応用
浅原 彰文; 美濃島 薫
月刊OPTRONICS, オプトロニクス社, 10, 10, 94-98, Oct. 2017
Research society, Japanese

Purely excitonic lasing in ZnO microcrystals: Temperature-induced transition between exciton-exciton and exciton-electron scattering
Ryosuke Matsuzaki; Haruka Soma; Kanae Fukuoka; Kanako Kodama; Akifumi Asahara; Tohru Suemoto; Yutaka Adachi; Takashi Uchino
PHYSICAL REVIEW B, AMER PHYSICAL SOC, 96, 12, 1-8, Sep. 2017, Peer-reviwed
Scientific journal, English

Dual-comb spectroscopy for rapid characterization of complex optical properties of solids
Akifumi Asahara; Akiko Nishiyama; Satoru Yoshida; Ken-ichi Kondo; Yoshiaki Nakajima; Kaoru Minoshima
光学（日本光学会機関誌）, 46, 6, 235-235, 10 Jun. 2017
Research society, Japanese

Scan-less confocal phase microscopy based on dual comb spectroscopy of two-dimensional-image-encoding optical frequency comb
Eiji Hase; Takeo Minamikawa; Shuji Miyamoto; Ryuji Ichikawa; Yi-Da Hsieh; Kyuki Shibuya; Yoshiaki Nakajima; Akifumi Asahara; Kaoru Minoshima; Yasuhiro Mizutani; Tetsuo Iwata; Hirotsugu Yamamoto; Takeshi Yasui
arXiv, 1705.07236, 20 May 2017
Scientific journal, English

Application of Relative Carrier Envelope Offset Frequency for Coherent Control in Dual-Comb Configuration
Akifumi Asahara; Ken-ichi Kondo; Yue Wang; Kaoru Minoshima
ALPS'17, ALPS2-3, 18 Apr. 2017, Peer-reviwed
International conference proceedings, English

Development of Rapid Evaluation Method of anisotropy of Nonlinear Optical Materials by Dual Comb Spectroscopy
Ken-ichi Kondo; Akifumi Asahara; Yue Wang; Kaoru Minoshima
ALPS'17, ALPS2-2, 18 Apr. 2017, Peer-reviwed
International conference proceedings, English

Development of ultrafast time-resolved dual-comb spectroscopy
Akifumi Asahara; Kaoru Minoshima
APL Photonics, 2, 041301-1-041301-6, 21 Feb. 2017, Peer-reviwed
Scientific journal, English

Isotopic comparison of gelatin extracted from bone powder with that from bone chunk and development of a framework for comparison of different extraction methods
Takumi Tsutaya; Takashi Gakuhari; Akifumi Asahara; Minoru Yoneda
Journal of Archaeological Science: Reports, 11, 99-105, 01 Feb. 2017, Peer-reviwed
Scientific journal, English

Coherent control of relative carrier envelope phase in Dual-comb spectroscopy
Akifumi Asahara; Ken-Ichi Kondo; Yue Wang; Kaoru Minoshima
Optics InfoBase Conference Papers, OSA - The Optical Society, 2017, 2017, Peer-reviwed, Relative carrier envelope phase control was actively exploited in dual-comb spectroscopy, and polarizationmodulated pulse train generation and its coherent detection were demonstrated. This proof-of-principle experiment promotes advanced coherent spectroscopy using optical frequency combs.
International conference proceedings, English

Precise Birefringence Measurement of Anisotropic Materials by Dual-Comb Spectroscopy
Ken-ichi Kondo; Akifumi Asahara; Yue Wang; Ichiro Shoji; Kaoru Minoshima
2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS PACIFIC RIM (CLEO-PR), IEEE, 1-4P-4, 2017, Peer-reviwed, Dual-comb spectroscopy (DCS) is a new Fourier spectroscopic method which realizes precise and rapid spectral detection with a broad bandwidth. In this study, we applied DCS to characterization of birefringence of anisotropic materials. As a demonstration, we evaluated the refractive index and the birefringence of an anisotropic crystal, Nd:YVO4. We confirmed the evaluated values were consistent to some reference data, and our proposed scheme was successfully performed as the precise and rapid characterization method of the birefringence. It is expected that this technique will become a useful tool in a wide range of applications such as laser developments.
International conference proceedings, English

Coherent Modulation of Interference Signals in Dual-Comb Spectroscopy
Akifumi Asahara; Ken-ichi Kondo; Yue Wang; Kaoru Minoshima
2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS PACIFIC RIM (CLEO-PR), IEEE, 2-4H-2, 2017, Peer-reviwed, In this study, we particularly focus on the coherent controllability of optical frequency combs. By appropriately adjusting the four frequency parameters involved in dual-comb spectroscopy, f(rep), Delta f(rep), f(ceo), and Delta f(ceo), unique and arbitrary coherent modulation schemes can be realized. In a demonstration, the interferogram was successfully modulated by controlling the Delta f(ceo). This proof-of-principle experiment will lead to fundamental techniques utilized for coherent spectroscopy using optical frequency combs.
International conference proceedings, English

Portable and Stable Dual-Comb Spectroscopic System Based on an All-Fiber Setup
Yue Wang; Akifumi Asahara; Ken-ichi Kondo; Kaoru Minoshima
2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS PACIFIC RIM (CLEO-PR), IEEE, P3-119, 2017, Peer-reviwed, Dual-comb spectroscopy is a powerful spectroscopic method that can measure broadband spectral information with high accuracy and a short acquisition time. We have been particularly developing a new method to evaluate the complex refractive index of solid samples based on the dual-comb technique. In this research, we aimed to realize a simple and practical dual-comb spectroscopic system with broad applicability to samples and measurement conditions by developing an all-fiber-type dual-comb spectroscopic system, which is compact, stable, and easy to use.
International conference proceedings, English

Tailoring the fiber-based frequency combs for metrology application with coherent control
Kaoru Minoshima; Akifumi Asahara; Ken-Ichi Kondo; Yue Wang
Optics InfoBase Conference Papers, OSA - The Optical Society, 2017, AW1A.1, 2017, Frequency control of the relative carrier envelope phase in the dual-comb source was utilized as an advanced light source for versatile coherent control. Rapid polarization-modulated pulse train was generated, and its coherent detection was demonstrated.
International conference proceedings, English

Dual-comb spectroscopy for rapid characterization of complex optical properties of solids
Akifumi Asahara; Akiko Nishiyama; Satoru Yoshida; Ken-ichi Kondo; Yoshiaki Nakajima; Kaoru Minoshima
OPTICS LETTERS, OPTICAL SOC AMER, 41, 21, 4971-4974, Nov. 2016, Peer-reviwed
Scientific journal, English

Time-resolved fourier measurement for semiconductors by near-infrared dual-comb spectroscopy
Akifumi Asahara; Akiko Nishiyama; Satoru Yoshida; Ken-Ichi Kondo; Yoshiaki Nakajima; Kaoru Minoshima
Optics InfoBase Conference Papers, OSA - The Optical Society, UW4A.9, 18 Jul. 2016, Peer-reviwed, Complex near-infrared refractive-index spectra of Si and GaAs wafers were characterized by dual-comb spectroscopy (DCS). Transient interferogram was observed for an InGaAs-based saturable absorber in time-resolved DCS, demonstrating potential as a fullcharacterization tool.
International conference proceedings, English

Time-Domain Measurements for Characterization of Solids by Dual-Comb Spectroscopy and Asynchronous Optical Sampling
Akifumi Asahara; Akiko Nishiyama; Satoru Yoshida; Ken-ichi Kondo; Yoshiaki Nakajima; Kaoru Minoshima
ALPS'16, ALPS2-2, 17 May 2016, Peer-reviwed
International conference proceedings, English

Mode filtering of fiber-based optical frequency comb by use of Fabry-Perot cavities and its application
S. Yoshida; A. Nishiyama; A. Asahara; Y. Nakajima; K. Minoshima
ALPS'16, ALPS1-5,, 17 May 2016, Peer-reviwed
International conference proceedings, English

Dual-Comb Spectroscopy for Solid-State Physics and Extension toward Time-Resolved Measurement
Akifumi Asahara; Akiko Nishiyama; Satoru Yoshida; Ken-ichi Kondo; Yoshiaki Nakajima; Kaoru Minoshima
2016 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO), IEEE, SW1H.7, 2016, Peer-reviwed, Dual-comb spectroscopy was applied for characterization of complex refractive-index of a Si wafer and transient interferogram by optical excitation in an InGaAs-based saturable absorber. Full-characterization tool with wide dynamic-range in time-and frequency-domain is provided.
International conference proceedings, English

Dynamics of Photoinduced Phase Transitions in a Prussian Blue Analog Studied by CN Vibrational Spectroscopy
Tohru Suemoto; Ryo Fukaya; Akifumi Asahara; Hiroshi Watanabe; Hiroko Tokoro; Shin-ichi Ohkoshi
Current Inorganic Chemistry, 6, 1, 10-25, 2016, Peer-reviwed
Scientific journal, English

Photoexcited d-electron dynamics in transition metal oxide MnO studied by optical pump-THz probe measurements
Junichi Nishitani; Takayuki Kurihara; Akifumi Asahara; Takeshi Nagashima; Mikk Lippmaa; Tohru Suemoto
PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 13, NO 2-3, WILEY-V C H VERLAG GMBH, 13, 2-3, 113-116, 2016, Peer-reviwed
International conference proceedings, English

Transient gain analysis of gain-switched semiconductor lasers during pulse lasing
Shaoqiang Chen; Takashi Ito; Akifumi Asahara; Hidekazu Nakamae; Takahiro Nakamura; Masahiro Yoshita; Changsu Kim; Baoping Zhang; Hiroyuki Yokoyama; Tohru Suemoto; Hidefumi Akiyama
APPLIED OPTICS, OPTICAL SOC AMER, 54, 35, 10438-10442, Dec. 2015, Peer-reviwed
Scientific journal, English

Ultraviolet stimulated emission from high-temperature-annealed MgO microcrystals at room temperature
Haruka Soma; Yuki Uenaka; Akifumi Asahara; Tohru Suemoto; Takashi Uchino
APPLIED PHYSICS LETTERS, AMER INST PHYSICS, 106, 4, 108-111, Jan. 2015, Peer-reviwed
Scientific journal, English

Direct generation of 2-ps blue pulses from gain-switched InGaN VCSEL assessed by up-conversion technique
Akifumi Asahara; Shaoqiang Chen; Takashi Ito; Masahiro Yoshita; Wenjie Liu; Baoping Zhang; Tohru Suemoto; Hidefumi Akiyama
SCIENTIFIC REPORTS, NATURE PUBLISHING GROUP, 4, 108-111, Sep. 2014, Peer-reviwed
Scientific journal, English

Domain growth and aggregation dynamics in photo-induced phase transition phenomena
Hiroshi Watanabe; Shun Ishige; Akifumi Asahara; Hiroko Tokoro; Shin-ichi Ohkoshi; Tohru Suemoto
JOURNAL OF LUMINESCENCE, ELSEVIER SCIENCE BV, 152, 108-111, Aug. 2014, Peer-reviwed
Scientific journal, English

Ultrafast dynamics of photoinduced semiconductor-to-metal transition in the optical switching nano-oxide Ti3O5
Akifumi Asahara; Hiroshi Watanabe; Hiroko Tokoro; Shin-ichi Ohkoshi; Tohru Suemoto
PHYSICAL REVIEW B, AMER PHYSICAL SOC, 90, 1, 1-7, Jul. 2014, Peer-reviwed
Scientific journal, English

Spectral dynamics of picosecond gain-switched pulses from nitride-based vertical-cavity surface-emitting lasers
Shaoqiang Chen; Takashi Ito; Akifumi Asahara; Masahiro Yoshita; Wenjie Liu; Jiangyong Zhang; Baoping Zhang; Tohru Suemoto; Hidefumi Akiyama
SCIENTIFIC REPORTS, NATURE PUBLISHING GROUP, 4, 108-111, Mar. 2014, Peer-reviwed
Scientific journal, English

Gain-switching dynamics in optically pumped single-mode InGaN vertical-cavity surface-emitting lasers
Shaoqiang Chen; Akifumi Asahara; Takashi Ito; Jiangyong Zhang; Baoping Zhang; Tohru Suemoto; Masahiro Yoshita; Hidefumi Akiyama
OPTICS EXPRESS, OPTICAL SOC AMER, 22, 4, 4196-4201, Feb. 2014, Peer-reviwed
Scientific journal, English

Probing of local structures of thermal and photoinduced phases in rubidium manganese hexacyanoferrate by resonant Raman spectroscopy
Ryo Fukaya; Akifumi Asahara; Shun Ishige; Makoto Nakajima; Hiroko Tokoro; Shin-ichi Ohkoshi; Tohru Suemoto
JOURNAL OF CHEMICAL PHYSICS, AMER INST PHYSICS, 139, 8, 108-111, Aug. 2013, Peer-reviwed
Scientific journal, English

Ultrafast dynamics of reversible photoinduced phase transitions in rubidium manganese hexacyanoferrate investigated by midinfrared CN vibration spectroscopy
Akifumi Asahara; Makoto Nakajima; Ryo Fukaya; Hiroko Tokoro; Shin-ichi Ohkoshi; Tohru Suemoto
PHYSICAL REVIEW B, AMER PHYSICAL SOC, 86, 19, 108-111, Nov. 2012, Peer-reviwed
Scientific journal, English

Growth Dynamics of Photoinduced Phase Domain in Cyano-Complex Studied by Boundary Sensitive Raman Spectroscopy
Asahara, A; Nakajima, M; Fukaya, R; Tokoro, H; Ohkoshi, S; Suemoto, T
ACTA PHYSICA POLONICA A, 121, 2, 375-378, Mar. 2012, Peer-reviwed
Scientific journal, English

Dynamics of photoinduced phase transitions in hexacyanoferrate studied by infrared and Raman spectroscopy
T. Suemoto; R. Fukaya; A. Asahara; M. Nakajima; H. Tokoro; S. Ohkoshi
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, WILEY-BLACKWELL PUBLISHING, INC, 248, 2, 477-481, Feb. 2011, Peer-reviwed
Scientific journal, English

Photo-induced phase switching dynamics in RbMn[Fe(CN)(6)] probed by accumulation free mid-infrared spectroscopy
Akifumi Asahara; Makoto Nakajima; Ryo Fukaya; Hiroko Tokoro; Shin-ichi Ohkoshi; Tohru Suemoto
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, WILEY-BLACKWELL, 248, 2, 491-494, Feb. 2011, Peer-reviwed
Scientific journal, English

デュアルコム非同期光サンプリング技術を用いた広時間ダイナミックレンジなOAM依存時間分解測定法
浅原 彰文; 美濃島 薫
Oral presentation, 第72回応用物理学会春季学術講演会
15 Mar. 2025

[Py-18]差周波発生による広帯域中赤外光コムの高度化と特性評価に関する研究
平野,吉井; 加藤; 浅原; 美濃島
Poster presentation, 第24回レーザー学会東京支部研究会,日本大学理工学部
10 Mar. 2025

[Py-16]光コムの光位相制御を用いた背景光除去手法による分光計測の高感度化
関口,日野; 浅原; 加藤; 美濃島
Poster presentation, 第24回レーザー学会東京支部研究会,日本大学理工学部
10 Mar. 2025

[Py-2]ガス封入した中空フォトニック結晶ファイバの光計測にむけた光伝播特性の基礎評価
阿部,加藤; 浅原; 美濃島
Poster presentation, 第24回レーザー学会東京支部研究会,日本大学理工学部
10 Mar. 2025

[Py-1]双方向動作型デュアルコムファイバレーザーを用いた位相補正による広帯域な中赤外固体物性評価手法に関する研究
的場,清水; 加藤; 浅原; 美濃島
Poster presentation, 第24回レーザー学会東京支部研究会,日本大学理工学部
10 Mar. 2025

[Px-19]デュアルコム分光による薄膜試料の光学特性評価手法の基礎検討
渡辺,伊藤; 浅原; 美濃島
Poster presentation, 第24回レーザー学会東京支部研究会,日本大学理工学部
10 Mar. 2025

[Px-18]簡便な中赤外分光のための機械共有型デュアルコムファイバレーザーシステムの開発
山田,長尾; 加藤; 浅原; 美濃島
Poster presentation, 第24回レーザー学会東京支部研究会,日本大学理工学部
10 Mar. 2025

[Px-03]インラインファイバ型可視光コムに基づく実用計測光源開発に向けた基礎評価
中島,加藤; 浅原; 美濃島
Poster presentation, 第24回レーザー学会東京支部研究会,日本大学理工学部
10 Mar. 2025

[Px-02]電気光学変調コムによる単一モード光源の特性評価
佐藤,鎌田; 加藤; 浅原; 美濃島
Poster presentation, 第24回レーザー学会東京支部研究会,日本大学理工学部
10 Mar. 2025

[Px-01]双方向動作型デュアルコムファイバレーザーを用いた位相補正による高感度・広帯域な中赤外ガス分光
清水,浅原; 加藤; 美濃島
Poster presentation, 第24回レーザー学会東京支部研究会,日本大学理工学部
10 Mar. 2025

Remote fiber sensing by quantum spectroscopy using frequency entangled photons via a real-world fiber network
Masahiro Ishizeki; Tomoya Okita; Akifumi Asahara; Ryosuke Shimizu; Kaoru Minoshima
Poster presentation, Photonics West 2025, Peer-reviewed
29 Jan. 2025

【招待講演】OAMモードを用いたデュアルコム分光法の空間次元計測への展開
浅原 彰文; 美濃島 薫
Invited oral presentation, レーザー学会年次大会(広島), Invited
22 Jan. 2025

[30pB1]二波長同期光コムを用いた非同期光サンプリングによる単一光子レベル超高速パルス特性評価法の開発
小森; Prasad, 石関; Tian, Schibli; 加藤, 浅原; 清水, 美濃島
Oral presentation, Optics & Photonics Japan 2024 (OPJ2024)
30 Nov. 2024

[30pB2]機械共有型トライコムファイバレーザーによる高速性と広帯域性を両立した高機能分光
長尾, 加藤; 浅原, 美濃島
Oral presentation, Optics & Photonics Japan 2024 (OPJ2024)
30 Nov. 2024

[30a2P9]10GHz 電気光学変調コムのモード分解性を用いた精密距離測定法の開発
鎌田, 李; 加藤; 浅原; 美濃島
Poster presentation, Optics & Photonics Japan 2024 (OPJ2024)
30 Nov. 2024

[30a2P10]円偏光二色性測定に向けた可視-近赤外域におけるコヒーレント制御デュアルコム分光
朱, Tian; 加藤; 浅原, 美濃島
Poster presentation, Optics & Photonics Japan 2024 (OPJ2024)
30 Nov. 2024

[29aD2]デュアルコムファイバレーザーを用いた中赤外デュアルコムガス分光の位相補正による高感度化
清水, 浅原; 加藤, 美濃島
Oral presentation, Optics & Photonics Japan 2024 (OPJ2024)
29 Nov. 2024

[29aD4]実環境ファイバ伝送した周波数もつれ光子を用いた遠隔量子ファイバセンシング技術の開発
石関, 大北; 浅原; 清水; 美濃島
Oral presentation, Optics & Photonics Japan 2024 (OPJ2024)
29 Nov. 2024

[29aD10]デュアルコム分光の繰り返し周波数変調によるデッドタイム低減化手法の研究
伊藤, 朱; 加藤; 浅原; 美濃島
Oral presentation, Optics & Photonics Japan 2024 (OPJ2024)
29 Nov. 2024

[15]デュアルコム分光法における繰り返し周波数の動的制御による高速測定法の研究
伊藤, 朱; 加藤; 浅原; 美濃島
Poster presentation, レーザー学会第590回研究会「次世代ファイバレーザー研究会」
22 Nov. 2024

[22] モード分解されたEOコムのスペクトル干渉による精密距離測定法の開発
鎌田, 李; 加藤; 浅原; 美濃島
Poster presentation, レーザー学会第590回研究会「次世代ファイバレーザー研究会」
22 Nov. 2024

[23] 実環境ファイバネットワークを介した周波数もつれ光子による量子ファイバセンシング手法の開発
石関, 大北; 浅原; 清水; 美濃島
Poster presentation, レーザー学会第590回研究会「次世代ファイバレーザー研究会」
22 Nov. 2024

[25] 光コムを用いた瞬時3次元計測手法における一体化したイメージング光学系による適用性拡大
小椋, 加藤; 浅原, 美濃島
Poster presentation, レーザー学会第590回研究会「次世代ファイバレーザー研究会」
22 Nov. 2024

Mid-infrared dual-comb spectroscopy with absolute frequency determination using dual-comb fiber laser
Akifumi Asahara; Gakuto Fukawa; Takayuki Shimizu; Takashi Kato; Kaoru Minoshima
Oral presentation, ICO-26, Peer-reviewed
24 Oct. 2024

繰り返し周波数の変調によるデュアルコム分光法の高速化手法の研究
伊藤 万葉; 朱 瑞宸; 加藤 峰士; 浅原 彰文; 美濃島 薫
Oral presentation, 第85回応用物理学会秋季学術講演会
19 Sep. 2024

実環境ファイバ伝送を介した周波数もつれ光子による非局所相関を用いた量子分光ファイバセンシング
石関 政洋; 大北 智也; 浅原 彰文; 清水 亮介; 美濃島 薫
Oral presentation, 第85回応用物理学会秋季学術講演会
19 Sep. 2024

Quantum Spectroscopy using 2D Spectrum of Telecom-band Frequency Entangled Photons for Real-World Fiber Network Applications
Masahiro Ishizeki; Yuki Okura; Akifumi Asahara; Ryosuke Shimizu; Kaoru Minoshima
CLEO-PR2024, Peer-reviewed
09 Aug. 2024
09 Aug. 2024- 09 Aug. 2024

Time-Frequency Characterization of Ultrafast Quantum Entangled Biphotons Through Optical Frequency Comb Based Two-Color Asynchronous Optical Sampling
Prasad Koviri; Takahisa Kuwana; Hajime Komori; Takashi Kato; Akifumi Asahara; Thomas R. Schibli; Ryosuke Shimizu; Kaoru Minoshima
CLEO-PR2024, Peer-reviewed
08 Aug. 2024
08 Aug. 2024- 08 Aug. 2024

Coherent-Controllable Vis-NIR Dual-Comb Spectroscopy with a High-Power, High-Coherence Fiber Comb System
Ruichen Zhu; Haochen Tian; Takashi Kato; Akifumi Asahara; Kaoru Minoshima
CLEO-PR2024, Peer-reviewed
06 Aug. 2024
06 Aug. 2024- 06 Aug. 2024

Development of an All-polarization-maintaining Tri-comb Fiber Laser with a Mechanicalsharing Configuration
Kosei Nagao; Takahisa Miura; Takashi Kato; Akifumi Asahara; Kaoru Minoshima
CLEO-PR2024, Peer-reviewed
06 Aug. 2024
06 Aug. 2024- 06 Aug. 2024

Practical and High SNR Mid-infrared Dual-comb Spectroscopy Based on Bidirectional Dualcomb Er Fiber Laser
Akifumi Asahara; Gakuto Fukawa; Takayuki Shimizu; Takashi Kato; Kaoru Minoshima
CLEO-PR2024, Peer-reviewed
05 Aug. 2024
05 Aug. 2024- 05 Aug. 2024

Tomographic Imaging with Broadband Optical Noise Cancelling Using Antiphase Pulse by Phase-controlled Optical Frequency Comb
Takashi Kato; Keito Hino; Yasuhisa Nekoshima; Akifumi Asahara; Kaoru Minoshima
CLEO-PR2024, Peer-reviewed
05 Aug. 2024
05 Aug. 2024- 05 Aug. 2024

Dual-comb Fiber Laser-based Practical Mid-infrared Dual-comb Spectroscopy via Real-time and Long-term Coherent Averaging
Akifumi Asahara; Gakuto Fukawa; Takayuki Shimizu; Takashi Kato; Kaoru Minoshima
CLEO2024, Peer-reviewed
10 May 2024
10 May 2024- 10 May 2024

Broadband High-Power Dual-Comb System covering Visible to Near-IR Region
Ruichen Zhu; Haochen Tian; Runmin Li; Sida Xing; Thomas R. Schibli; Takashi Kato; Akifumi Asahara; Kaoru Minoshima
CLEO2024, Peer-reviewed
10 May 2024
10 May 2024- 10 May 2024

Development of a Simple and Stable All-Polarization-Maintaining Multi-Comb Source with a Mechanical-Sharing Configuration
Kosei Nagao; Takashi Kato; Akifumi Asahara; Kaoru Minoshima
ALPS2024, Peer-reviewed
25 Apr. 2024
25 Apr. 2024- 25 Apr. 2024

Quantum Spectroscopy using 2D Spectrum of Telecom-band Frequency Entangled Photons for Quantum Remote Sensing
Masahiro Ishizeki; Takeru Naito; Takahisa Kuwana; Akifumi Asahara; Ryosuke Shimizu; Kaoru Minoshim
ALPS2024, Peer-reviewed
25 Apr. 2024
25 Apr. 2024- 25 Apr. 2024

Measurement of detailed single-photon ultra-fast pulse characteristics by asynchronous optical sampling using a dual-wavelength combs
Hajime Komori; Prasad Koviri; Masahiro Ishizeki; Haochen Tian; Thomas R Schibli; Takashi Kato; Akifumi Asahara; Ryosuke Shimizu; Kaoru Minoshima
ALPS2024, Peer-reviewed
25 Apr. 2024
25 Apr. 2024- 25 Apr. 2024

Highly Sensitive and Practical Mid-infrared Dual-comb Spectroscopy using Dual-comb Fiber Laser with Long-term Coherent Averaging
Akifumi Asahara; Gakuto Fukawa; Takayuki Shimizu; Takashi Kato; Kaoru Minoshima
ALPS2024, Peer-reviewed
24 Apr. 2024
24 Apr. 2024- 24 Apr. 2024

High-Power and High-Coherence Fiber Comb System for Broadband Dual-Comb Spectroscopy in Vis–NIR Region
Ruichen Zhu; Haochen Tian; Runmin Li; Sida Xing; Thomas R. Schibli; Takashi Kato; Akifumi Asahara; Kaoru Minoshim
ALPS2024, Peer-reviewed
24 Apr. 2024
24 Apr. 2024- 24 Apr. 2024

実環境下における量子リモートセンシングに向けた周波数もつれ光子の非局所相関による量子分光法の開発
石関 政洋; 大倉 悠暉; 浅原 彰文; 清水 亮介; 美濃島 薫
Oral presentation, 応用物理学会春季学術講演会
25 Mar. 2024

デュアルコムファイバレーザーを用いたコヒーレント積算による高感度かつ実用的な中赤外デュアルコム分光法の開発
浅原 彰文; 布川 楽士; 清水 貴之; 加藤 峰士; 美濃島 薫
Oral presentation, 応用物理学会春季学術講演会
22 Mar. 2024

電気光学変調コムによるモード分解したスペクトル干渉を用いた精密距離測定法に関する基礎検討
鎌田 峻輔; 加藤 峰士; 浅原 彰文; 美濃島 薫
Poster presentation, 第23回レーザー学会東京支部研究会
12 Mar. 2024

全偏波保持機械共有型NALMモード同期ファイバレーザーによる環境安定性の高いトライコム光源の開発および評価
三浦 貴寿; 長尾 康生; 加藤 峰士; 浅原 彰文; 美濃島 薫
Poster presentation, 第23回レーザー学会東京支部研究会
12 Mar. 2024

デュアルコム分光法による高時間ダイナミックレンジな動的現象測定法の検討
伊藤 万葉; 長崎 亮太; 朱 瑞宸; 加藤 峰士; 浅原 彰文; 美濃島 薫
Poster presentation, 第23回レーザー学会東京支部研究会
12 Mar. 2024

機械共有型マルチコム光源の高度化と安定性の評価
長尾康生; 加藤峰士; 浅原彰文; 美濃島薫
Oral presentation, レーザー学会第44回年次大会
19 Jan. 2024

可視から近赤外領域にわたる広帯域・高出力光コムの開発
朱 瑞宸; 田 昊晨; 李 润敏; 邢 思达; Thomas R. Schibli; 加藤 峰士; 浅原 彰文; 美濃島 薫
Oral presentation, OPJ2023
29 Nov. 2023

双方向動作型デュアルコムファイバレーザーの差周波発生を用いた中赤外固体物性評価法の開発
布川楽士; 清水貴之; Jiajie LI; 加藤峰士; H. Tian; 浅原彰文; 美濃島薫
Oral presentation, OPJ2023
28 Nov. 2023

Ultrafast time-resolved up-conversion of single-photons through two-color comb based asynchronous optical sampling
P. Koviri; H. Komori; M. Ishizeki; H. Tian; T. Schibli; T. Kato; A. Asahara; R. Shimizu; K. Minoshima
Oral presentation, OPJ2023
28 Nov. 2023

インラインファイバ型可視広帯域光コム光源を用いたデュアルコム分光法の開発
長崎亮太; R. Zhu; 加藤峰士; 浅原彰文; 美濃島薫
Poster presentation, レーザー学会581回研究会「次世代ファイバレーザー技術」
17 Nov. 2023

高繰り返しErおよびYbファイバコムを用いた非同期光サンプリングによる単一光子フェムト秒時間分解計測法の開発
小森 孟; Prasad Koviri; 石関 政洋; 田 昊晨; Thomas R. Schibli; 加藤 峰士; 浅原 彰文; 清水 亮介; 美濃島 薫
Poster presentation, レーザー学会581回研究会「次世代ファイバレーザー技術」
17 Nov. 2023

デュアル光コム分光偏光計による偏光素子の計測
北濱 弘暉; 是澤 秀紀; 長谷 栄治; 浅原 彰文; 南川 丈夫; 安井 武史
Oral presentation, 第84回応用物理学会秋季学術講演会
21 Sep. 2023

二波長同期光コムを用いた非同期光サンプリングによる単一光子レベルのフェムト秒時間分解計測法の開発
小森 孟; Prasad Koviri; 石関 政洋; 田 昊晨; Thomas R. Schibli; 加藤 峰士; 浅原 彰文; 清水 亮介; 美濃島 薫
Oral presentation, 第84回応用物理学会秋季学術講演会
21 Sep. 2023

Dual-comb spectroscopy extended for spatiotemporal measurement applications using OAM light
Akifumi Asahara; Kaoru Minoshima
Invited oral presentation, ISMTII2023, Invited
20 Sep. 2023

Demonstration of Quantum Spectroscopy Method using 2D Spectrum of Telecom-band Frequency Entangled Photons towards Quantum Remote Sensing
Masahiro Ishizeki; Takeru Naito; Takahisa Kuwana; Akifumi Asahara; Ryosuke Shimizu; Kaoru Minoshima
Oral presentation, APLS2023, Peer-reviewed
05 Sep. 2023
Sep. 2023 Sep. 2023

Broadband visible dual-comb spectroscopy using spectral stitching of nonlinearly generated light by waveguide-type PPLN crystals
Ryota Nagasaki; Ruichen Zhu; Takashi Kato; Akifumi Asahara; Kaoru Minoshima
Poster presentation, APLS2023, Peer-reviewed
05 Sep. 2023
Sep. 2023 Sep. 2023

Dual-comb spectroscopy with OAM modes for azimuth angle measurement
Akifumi Asahara; Kaoru Minoshima
Oral presentation, FTS, Optica Sensing Congress, Peer-reviewed
03 Aug. 2023
Aug. 2023 Aug. 2023

Advanced circular dichroism measurement method with circular polarization switching dual-comb spectroscopy
R. Zhu; R. Nagasaki; T. Kato; H. Tian; A. Asahara; K. Minoshima
CLEO2023, Peer-reviewed
12 May 2023
May 2023 May 2023

Highly functional dual-comb spectroscopy with versatile optical phase control
K. Minoshima; A. Asahara
CLEO2023, Invited, Peer-reviewed
11 May 2023
May 2023 May 2023

Coherent OAM modulation technique using versatile phase controllability of multi-optical-combs towards sensitive and rapid spatiotemporal spectroscopy
A. Asahara; R. Zhu; K. Minoshima
CLEO2023, Peer-reviewed
08 May 2023
May 2023 May 2023

High precision and extended non-ambiguity range absolute distance measurement based on a coherently synthesized two-color electro-optic frequency comb
R. Li; H. Tian; T. Kato; A. Asahara; K. Minoshima
ALPS2023, Peer-reviewed
21 Apr. 2023
Apr. 2023 Apr. 2023

Fundamental study on quantum remote sensing using nonlocal correlation of frequency entangled photon pair generated by ultra-short pulse train for fiber network
M. Ishizeki; T. Naito; T. Kuwana; A. Asahara; R. Shimizu; K. Minoshima
ALPS2023, Peer-reviewed
21 Apr. 2023
Apr. 2023 Apr. 2023

Evaluation of solid-state physical properties by mid-infrared dual-comb spectroscopy based on a dual-comb fiber laser
G. Fukawa; J. Li; H. Tian; T. Kato; A. Asahara; K.Minoshima
ALPS2023, Peer-reviewed
20 Apr. 2023
Apr. 2023 Apr. 2023

Ultrafast time-resolved single-photon detection method using two-color asynchronous optical sampling
P. Koviri; H. Komori; M. Ishizeki; H. Tian; T. Schibli; T. Kato; A. Asahara; R. Shimizu; K. Minoshima
ALPS2023, Peer-reviewed
20 Apr. 2023
Apr. 2023 Apr. 2023

Dual-comb spectroscopy using free-running combs with digital phase correction
H. Tian; L. Sterczewski; R. Li; T. Endo; T. Kato; A. Asahara; K. Minoshima
Ultrafast Optics 2023, Invited, Peer-reviewed
31 Mar. 2023

Absolute distance measurement based on a coherently synthesized two-color electro-optic frequency comb
R. Li; H. Tian; T. Kato; A. Asahara; K. Minoshima
Ultrafast Optics 2023, Peer-reviewed
31 Mar. 2023

デュアル光コム分光偏光計の安定化に関する検討
北濱 弘暉; 是澤 秀紀; 長谷 栄治; 浅原 彰文; 南川 丈夫; 安井 武史
第70回応用物理学会春季学術講演会
17 Mar. 2023

プラズモニック金ナノ粒子における超高速偏光分解近赤外発光分光
杉田 篤史; 室井 堅森; 末元 徹; 浅原 彰文; 奥野 剛; 谷 峻太郎; 小林 洋平
第70回応用物理学会春季学術講演会
16 Mar. 2023

量子もつれ光子の非局所相関を利用したリモートセンシングに向けた周波数相関スペクトル測定の基礎検討
石関政洋; 内藤健; 桑名隆久; 浅原彰文; 清水亮介; 美濃島薫
第70回応用物理学会春季学術講演会
16 Mar. 2023

100-MHz全偏波保持機械共有型デュアルコムファイバレーザーの開発
長尾康生; 遠藤健; H. Tian; 浅原彰文; 美濃島薫
第70回応用物理学会春季学術講演会
16 Mar. 2023

高繰り返し二波長同期光コムによる高速・高感度非同期光サンプリング手法の開発
小森孟; P. Koviri; 石関政洋H. Tian; T. Schibli; 加藤峰士; 浅原彰文; 清水亮介; 美濃島薫
第70回応用物理学会春季学術講演会
16 Mar. 2023

Single-photon counting asynchronous optical sampling using dual-wavelength fiber comb
P. Koviri; H. Komori; M. Ishizeki; H. Tian; T. Kato; A. Asahara; R. Shimizu; K. Minoshima
レーザー学会年次大会
19 Jan. 2023

導波路型PPLN結晶を用いた可視広帯域デュアルコムの発生と分光応用の検証
長崎亮太; R. Zhu; 加藤峰士; 浅原彰文; 美濃島薫
レーザー学会年次大会
19 Jan. 2023

Single-photon-level ultrafast cross-correlation detection with photon counting based on two-color asynchronous optical sampling
P. Koviri; H. Komori; M. Ishizeki; H. Tian; T. Schibli; T. Kato; A. Asahara; R. Shimizu; K. Minoshima
UEC-SAAC
13 Dec. 2022

機械共有による一体型トライコムファイバレーザーシステムの開発と分光応用
遠藤健; 長尾康生; H. Tian; 浅原彰文; 美濃島薫
レーザー学会「次世代ファイバレーザー技術」研究会
18 Nov. 2022

導波路型PPLN結晶による可視光光コムのデュアルコム分光への適用性検証
長崎亮太; R. Zhu; 加藤峰士; 浅原彰文; 美濃島薫
レーザー学会「次世代ファイバレーザー技術」研究会
18 Nov. 2022

偏光変調デュアルコム分光法における円偏光スイッチングの適用性拡大
R. Zhu; 長崎亮太; 加藤峰士; H. Tian; 浅原彰文; 美濃島薫
OPJ2022
15 Nov. 2022

双方向動作型デュアルコムレーザーを用いた中赤外域における固体材料評価法の開発
布川楽士; Jiajie LI; 加藤峰士; H. Tian; 浅原彰文; 美濃島薫
OPJ2022
15 Nov. 2022

偏光変調デュアルコム分光法による円偏光スイッチングの特性評価
朱 瑞宸; 長崎 亮太; 加藤 峰士; 田 昊晨; 浅原 彰文; 美濃島 薫
Poster presentation, Japanese, 第5回レーザー学会「次世代ファイバーレーザー技術」専門委員会
23 Sep. 2022

ファイバネットワーク応用に向けたモード同期レーザーにより生成された伝令付き単一光子の伝送実験
石関 政洋; 桑名 隆久; 浅原 彰文; 清水 亮介; 美濃島 薫
Poster presentation, Japanese, 第5回レーザー学会「次世代ファイバーレーザー技術」専門委員会
23 Sep. 2022

Detection of Ultralow Intense Cross-correlation of Two-color Comb with Photon Counting Technique
Prasad Koviri; Masahiro Ishizeki; Haochen Tian; Hajime Komori; Akifumi Asahara; Ryosuke Shimizu; Kaoru Minoshima
Poster presentation, English, 第5回レーザー学会「次世代ファイバーレーザー技術」専門委員会
23 Sep. 2022

機械共有型トライコム光源システムの開発と相対安定性評価
遠藤 健; 長尾 康生; 田 昊晨; 浅原 彰文; 美濃島 薫
Oral presentation, Japanese, 第83回応用物理学会秋季学術講演会
22 Sep. 2022

超短パルスにより生成された伝令付き単一光子のファイバネットワーク伝送実験
石関 政洋; 桑名 隆久; 浅原 彰文; 清水 亮介; 美濃島 薫
Oral presentation, Japanese, 第83回応用物理学会秋季学術講演会
22 Sep. 2022

Single-photon Level Detection of Ultrafast Cross-correlation Signal using Asynchronous Optical Sampling with Two-color Dual-comb System
Prasad Koviri; Masahiro Ishizeki; Haochen Tian; Hajime Komori; Akifumi Asahara; Ryosuke Shimizu; Kaoru Minoshima
Oral presentation, English, 第83回応用物理学会秋季学術講演会
22 Sep. 2022

デュアルコム分光法を用いたコヒーレント制御による円偏光スイッチングの特性評価
朱 瑞宸; 長崎 亮太; 加藤 峰士; 田 昊晨; 浅原 彰文; 美濃島 薫
Oral presentation, Japanese, 第83回応用物理学会秋季学術講演会
22 Sep. 2022

Characterization of spirit-ring resonator metamaterials using polarization-sensitive dual-comb spectroscopy in near-infrared
A. Asahara; A. Sugita; K. MInoshima
Oral presentation, English, ICO-25
05 Sep. 2022

Distance measurement based on a coherently synthesized two-color EO comb towards high-accuracy air-refractive index self-correction
R. Li; H. Tian; T. Kato; A. Asahara; K. Minoshima
Oral presentation, English, CLEO-PR2022
04 Aug. 2022

Comb-line resolved dual-comb spectroscopy using free-running mechanical sharing combs
H. Tian; R. Li; L. A. Sterczewski; T. Kato; R. Zhu; A. Asahara; K. Minoshima
Oral presentation, English, CLEO-PR2022
04 Aug. 2022

A simple scheme for phase-sensitive dual-comb spectroscopy with mechanical-sharing dual-comb laser
T. Endo; H. Tian; A. Asahara; K. Minoshima
Oral presentation, English, CLEO-PR2022
04 Aug. 2022

Circular polarization switching in dual-comb spectroscopy using coherent-controlled multi-comb pulses towards circular dichroism characterization
R. Zhu; A. Asahara; T. Kato; H. Tian; K. Minoshima
Oral presentation, English, CLEO-PR2022
04 Aug. 2022

Mid-infrared dual-comb spectroscopy using bidirectional dual-comb fiber laser for greenhouse N2O gas detection
J. Li; A. Asahara; H. Tian; K. Yoshii; T. Kato; Y. Nakajima; K. Minoshima
Oral presentation, English, CLEO-PR2022
02 Aug. 2022

Low noise coherently synthesized two-color electro-optic frequency comb
R. Li; H. Tian; T. Kato; A. Asahara; K. Minoshima
Poster presentation, English, CLEO2022
18 May 2022

Quasi-real-time dual-comb spectroscopy based on 750-MHz Yb:fiber combs unfolding aliasing down-sampled spectra
H. Tian; R. Li; L. A. Sterczewski; T. Kato; A. Asahara; K. Minoshima
Poster presentation, English, CLEO2022
18 May 2022

Near-infrared dual-comb spectroscopy for direct characterization of optical responses in metamaterials
A. Asahara; A. Sugita; K. Minoshima
Oral presentation, English, CLEO2022
16 May 2022

Complex Optical Properties of Sprit-Ring Resonator Metamaterials Characterized by Near-infrared Dual-comb Spectroscopy
Akifumi Asahara; Atsushi Sugita; Kaoru Minoshima
Oral presentation, English, ALPS2022, International conference
19 Apr. 2022

Quasi-real-time dual-comb spectroscopy of acetylene using 750-MHz Yb:fiber combs
Haochen Tian; Runmin Li; Lukasz Sterczewski; Takashi Kato; Ruichen Zhu; Akifumi Asahara; Kaoru Minoshima
Oral presentation, English, ALPS2022, International conference
19 Apr. 2022

A method of utilizing phase in spectroscopy using dual-comb laser
Takeru Endo; Haochen Tian; Akifumi Asahara; Kaoru Minoshima
Oral presentation, English, ALPS2022, International conference
19 Apr. 2022

Broadband Coherently Synthesized Two-color Electro-Optic frequency comb
Runmin Li; Haochen Tian; Takashi Kato; Akifumi Asahara; Kaoru Minoshima
Oral presentation, English, ALPS2022, International conference
19 Apr. 2022

Application for mid-infrared dual-comb gas spectroscopy with bidirectional dual-comb fiber laser
JIAJIE LI; Akifumi Asahara; Haochen Tian; Kazumichi Yoshii; Takashi Kato; Yoshiaki Nakajima; Kaoru Minoshima
Oral presentation, English, ALPS2022, International conference
19 Apr. 2022

双方向動作型モード同期ファイバレーザーを用いた高速かつ簡便な中赤外域デュアルコムガス分光
李 嘉傑; 浅原 彰文; Tian Haochen; 吉井 一倫; 加藤 峰士; 中嶋 善晶; 美濃島 薫
Oral presentation, Japanese, 第69回応用物理学会春季学術講演会
25 Mar. 2022

デュアルコム分光法による物性評価技術のメタマテリアルへの適用
浅原彰文; 杉田篤史; 美濃島薫
Oral presentation, Japanese, 第69回応用物理学会春季学術講演会
24 Mar. 2022

プラズモニック金ナノロッド構造体の偏光分解超高速近赤外発光分光
杉田篤史; 王俊真; 室井堅森; 末元徹; 浅原彰文; 奥野剛史; 谷峻太郎; 小林洋平
Oral presentation, Japanese, 日本物理学会第77回年次大会
16 Mar. 2022

デュアルコムレーザーにおける簡便な選択的位相活用分光
遠藤 健; 田 昊晨; 浅原 彰文; 美濃島 薫
Oral presentation, Japanese, レーザー学会学術講演会第42回年次大会
12 Jan. 2022

デュアルコム分光法の多機能性を生かした固体分光への応用
浅原彰文; 美濃島薫
Invited oral presentation, Japanese, レーザー学会学術講演会第42回年次大会, Invited, Domestic conference
12 Jan. 2022

機械的ノイズ共有した一体型デュアルコムファイバレーザーシステムを用いた簡便な位相活用分光法
遠藤 健; 楠美 友悟; 浅原 彰文; 美濃島 薫
Oral presentation, Japanese, レーザー学会558回研究会「次世代ファイバレーザー技術」
12 Nov. 2021

ファイバコムのキャリアエンベロープ位相制御によるデュアルコム分光の低ノイズ化
朱 瑞宸; 浅原 彰文; 加藤峰士; 美濃島 薫
Oral presentation, Japanese, レーザー学会558回研究会「次世代ファイバレーザー技術」
12 Nov. 2021

2波長帯のファイバコムにおける機械的ノイズ共有を用いたコヒーレント同期
長谷川 達也; 楠美 友悟; 浅原 彰文; 清水 亮介; 美濃島 薫
Oral presentation, Japanese, レーザー学会558回研究会「次世代ファイバレーザー技術」
12 Nov. 2021

デュアルコム分光法を用いた高速な分光特性の空間分布取得法の検討
秋山誠志郎; 浅原彰文; 美濃島薫
Oral presentation, Japanese, 日本光学会年次学術講演会（OPJ2021）
28 Oct. 2021

光コムのコヒーレント制御によるデュアルコム分光法における低周波ノイズ抑制の検討
朱 瑞宸; 浅原 彰文; 加藤峰士; 美濃島 薫
Oral presentation, Japanese, 日本光学会年次学術講演会（OPJ2021）
28 Oct. 2021

双方向動作型デュアルコムファイバレーザーの非線形波長変換による中赤外分光への応用
李 嘉杰; 浅原 彰文; 田 昊晨; 吉井 一倫; 加藤 峰士; 中嶋 善晶; 美濃島 薫
Oral presentation, Japanese, 日本光学会年次学術講演会（OPJ2021）
28 Oct. 2021

機械共有機構により同期した波長帯の異なる光コムどうしの相対コヒーレント評価
長谷川 達也; 楠美 友悟; 浅原 彰文; 清水 亮介; 美濃島 薫
Oral presentation, Japanese, 日本光学会年次学術講演会（OPJ2021）
28 Oct. 2021

プラズモニック金ナノロッド構造体におけるフェムト秒時間分解近赤外発光分光
杉田篤史; 王俊真; 蒔山拓海; 末元徹; 浅原彰文; 奥野剛史; 谷峻太郎; 小林洋平
Oral presentation, Japanese, 日本物理学会2021年秋季大会
22 Sep. 2021

750-MHz repetition rate phase-linked Yb-fiber lasers for dual-comb spectroscopy
田 昊晨; 浅原 彰文; 美濃島 薫
Oral presentation, English, 第82回応用物理学会秋季学術講演会
13 Sep. 2021

Phase locking of two-color Electro-optic frequency combs generated with common modulators for coherent synthesis
李 润敏; 田 昊晨; 加藤 峰士; 浅原 彰文; 美濃島 薫
Oral presentation, English, 第82回応用物理学会秋季学術講演会
13 Sep. 2021

光コムによる量子もつれ光子生成と時間分解検出法の検討
佐久間 茂喜; 大島 拡輝; 長谷川 達也; 浅原 彰文; 清水 亮介; 美濃島 薫
Oral presentation, Japanese, 第82回応用物理学会秋季学術講演会
10 Sep. 2021

双方向動作型モード同期ファイバレーザーを用いたコヒーレント中赤外光発生とデュアルコム分光への応用
李 嘉杰; 田 昊晨; 吉井 一倫; 中嶋 善晶; 加藤 峰士; 浅原 彰文; 美濃島 薫
Oral presentation, Japanese, 第82回応用物理学会秋季学術講演会
10 Sep. 2021

機械共有型デュアルコムレーザーを用いた位相情報を活用した分光測定法の検討
遠藤 健; 楠美 友悟; 浅原 彰文; 美濃島 薫
Oral presentation, Japanese, 第82回応用物理学会秋季学術講演会
10 Sep. 2021

光コムのコヒーレント制御による干渉位相差制御を用いたデュアルコム分光法の感度向上
朱 瑞宸; 足立 拓斗; 浅原 彰文; 美濃島 薫
Poster presentation, Japanese, 超高速光エレクトロニクス研究会
19 May 2021

Orbital angular momentum-dependent phase detection using single-pixel dual-comb spectroscopy towards versatile manipulation of optical vortex light-wave
A. Asahara; T. Adachi; S. Akiyama; K. Minoshima
Oral presentation, English, CLEO:2021, International conference
13 May 2021

Highly functional dual-comb spectroscopy for versatile physical property evaluation of solid samples
T. Adachi; R. Zhu; S. Akiyama; A. Asahara; Y. Odagiri; C. Ishibashi; Y. Hatano; K. Minoshima
Oral presentation, English, CLEO:2021, International conference
10 May 2021

Optical phase spectral control of orbital angular momentum modes studied by dual-comb imaging spectroscopy
A. Asahara; T. Adachi; S. Akiyama; K. Minoshima
Poster presentation, English, ALPS 2021, International conference
20 Apr. 2021

High-precision mutual control of two-color fiber combs
T. Hasegawa; Y. Kusumi; S. Sakuma; A. Asahara; Y. Nakajima; R. Shimizu; K. Minoshima
Poster presentation, English, ALPS 2021, International conference
20 Apr. 2021

Sensitivity improvement in dual-comb spectroscopy by tailoring the phase-slip in the interference signals
R. Zhu; T. Adachi; A. Asahara; K. Minoshima
Oral presentation, English, ALPS 2021
19 Apr. 2021

シングルピクセルデュアルコム分光による多重光渦の位相検出
浅原 彰文; 足立 拓斗; 秋山 誠志郎; 美濃島 薫
Oral presentation, Japanese, 第68回応用物理学会春季学術講演会
19 Mar. 2021

デュアルコム分光法における干渉位相制御による高感度化の検討
朱 瑞宸; 足立 拓斗; 浅原 彰文; 美濃島 薫
Oral presentation, Japanese, 第68回応用物理学会春季学術講演会
16 Mar. 2021

デュアルコム分光法による電気光学効果測定の高度化
足立 拓斗; 朱 瑞宸; 秋山 誠志郎; 浅原 彰文; 小田切 雄介; 石橋 爾子; 波多野 智; 美濃島 薫
Oral presentation, Japanese, レーザー学会第41回年次大会
18 Jan. 2021

デュアルコム分光法を用いた磁気特性評価装置の試作機開発
小田切 雄介; 足立 拓斗; 浅原 彰文; 石橋 爾子; 波多野 智; 美濃島 薫
Invited oral presentation, Japanese, レーザー学会第41回年次大会, Domestic conference
18 Jan. 2021

High speed, high sensitivity, and high resolution methane gas analysis using dual-comb
R. Zhu; T. Adachi; A. Asahara; K. Minoshima
Poster presentation, English, Irago 2020
11 Dec. 2020

波長帯の異なる2種のファイバコムの高精度同期制御
長谷川 達也; 楠美 友悟; 佐久間 茂喜; 浅原 彰文; 中嶋 善晶; 清水 亮介; 美濃島 薫
Poster presentation, Japanese, レーザー学会第548回研究会「ファイバレーザー技術」
27 Nov. 2020

Detection of optical vortices with various topological charges using single-pixel dual-comb imaging
A. Asahara; T. Adachi; S. Akiyama; K. Minoshima
Oral presentation, English, FiO+LS 2020
14 Sep. 2020

デュアルコムイメージング分光による光渦のトポロジカルチャージ検出
浅原 彰文; 足立 拓斗; 秋山 誠志郎; 美濃島 薫
Oral presentation, Japanese, 第81回応用物理学会秋季学術講演会
10 Sep. 2020

デュアルコム分光と光渦を組み合わせた角度測定における高度化
秋山 誠志郎; 浅原 彰文; 足立 拓斗; 美濃島 薫
Oral presentation, Japanese, 第81回応用物理学会秋季学術講演会
08 Sep. 2020

Complex optical response measurement of solid material to external fields by dual-comb spectroscopy
T. Adachi; A. Asahara; Y. Odagiri; M. Shirakawa; M. Ishibashi; S. Hatano; E. Tokunaga; K. Minoshima
Oral presentation, English, CLEO-PR:2020
05 Aug. 2020

光コムの光渦研究への応用
浅原彰文; 美濃島薫
Invited oral presentation, Japanese, 精密計測を元に科学技術に変革をもたらす回路技術調査専門委員会, Domestic conference
16 Jul. 2020

Spatiotemporal Characterization of Optical Vortex Light-wave using Hyperspectral Dual-comb Imaging
Akifumi Asahara; Takuto Adachi; Seishiro Akiyama; Kaoru Minoshima
Oral presentation, English, CLEO:2020, International conference
12 May 2020

Dual-comb spectroscopy of dispersion properties in solid-state optical response
Takuto Adachi; Akifumi Asahara; Yusuke Odagiri; Masayuki Shirakawa; Chikako Ishibashi; Satoshi Hatano; Eiji Tokunaga; Kaoru Minoshima
Oral presentation, English, ALPS2020, International conference
21 Apr. 2020

Hyperspectral Spatial Phase Detection of Optical Vortices using Single-pixel Imaging and Dual-comb Spectroscopy
Akifumi Asahara; Takuto Adachi; Seishiro Akiyama; Kaoru Minoshima
Oral presentation, English, ALPS2020, International conference
21 Apr. 2020

デュアルコム固体分光法の電気光学効果測定への応⽤
足立 拓斗; 浅原 彰文; 白川 正之; 徳永 英司; 美濃島 薫
Oral presentation, Japanese, 第67回応用物理学会春季学術講演会
14 Mar. 2020

デュアルコム分光と光渦を組み合わせた⾓度測定におけるトポロジカルチャージ依存性
秋山 誠志郎; 浅原 彰文; 足立 拓斗; 美濃島 薫
Oral presentation, Japanese, 第67回応用物理学会春季学術講演会
13 Mar. 2020

デュアルコム分光による光渦のハイパースペクトルイメージング
浅原 彰文; 足立 拓斗; 秋山 誠志郎; 美濃島 薫
Oral presentation, Japanese, 第67回応用物理学会春季学術講演会
13 Mar. 2020

デュアルコム分光と光渦を用いた角度計測におけるトポロジカルチャージによる測定レンジの拡大
秋山 誠志郎; 浅原 彰文; 足立 拓斗; 美濃島 薫
Poster presentation, Japanese, 第20回レーザー学会東京支部研究会
09 Mar. 2020

Optical-frequency-comb microscopy with laser-scanning configuration for simultaneous and spectroscopic amplitude, quantitative phase, and polarization imaging
Takeo Minamikawa; Shota Nakano; Eiji Hase; Akifumi Asahara; Hidenori Koresawa; Takahiko Mizuno; Katsuya Sato; Hirotsugu Yamamoto; Kaoru Minoshima; Takeshi Yasui
Oral presentation, English, SPIE Photonics West OPTO 2020
06 Feb. 2020

Improvement and Quantitative Evaluation of Dual-comb based Asynchronous Optical Sampling Method
Tomohito Saito; Akifumi Asahara; Kouichi Akahane; Kaoru Minoshima; Junko Ishi-Hayase
Poster presentation, English, Industry-UCB-UEC-Keio Workshop 2019 (IUUKWS 2019)
10 Dec. 2019

偏光変調コムを利用した円二色性計測システムの開発と評価
白川 正之; 足立 拓斗; 浅原 彰文; 徳永 英司; 美濃島 薫
Poster presentation, Japanese, OPJ2019
05 Dec. 2019

デュアルコム分光法を用いた磁性材料評価装置の開発
小田切 雄介; 足立 拓斗; 浅原 彰文; 石橋 爾子; 波多野 智; 美濃島 薫
Invited oral presentation, Japanese, OPJ2019
03 Dec. 2019

デュアルコム分光法による固体材料の複素テンソルスペクトル計測
足立 拓斗; 浅原 彰文; 小田切 雄介; 白川 正之; 石橋 爾子; 波多野 智; 徳永 英司; 美濃島 薫
Oral presentation, Japanese, OPJ2019
02 Dec. 2019

Dual-comb spectroscopy for direct measurement of solid-state optical response
T. Adachi; A. Asahara; Y. Odagiri; M. Shirakawa; M. Ishibashi; S. Hatano; E. Tokunaga; K. Minoshima
Poster presentation, English, Irago conference 2019
29 Oct. 2019

複素テンソル評価に向けたデュアルコム固体分光法の高度化
足立 拓斗; 浅原 彰文; 小田切 雄介; 白川 正之; 石橋 爾子; 波多野 智; 徳永 英司; 美濃島 薫
Oral presentation, Japanese, 第80回応用物理学会秋季学術講演会
21 Sep. 2019

デュアル光渦コム分光法によるOAM検出性能の高度化
浅原彰文; 足立拓斗; 美濃島薫
Oral presentation, Japanese, 第80回応用物理学会秋季学術講演会
19 Sep. 2019

レーザー走査型光コム分光顕微鏡による生体計測
中野 祥汰; 南川 丈夫; 長谷 栄治; 浅原 彰文; 水野 孝彦; 佐藤 克也; 山本 裕紹; 美濃島 薫; 安井 武史
Poster presentation, Japanese, 第80回応用物理学会秋季学術講演会
18 Sep. 2019

レーザー走査型光コム定量位相差顕微鏡によるバイオイメージング
中野祥汰; 南川丈夫; 長谷栄治; 浅原彰文; 水野孝彦; 佐藤克也; 山本裕紹; 美濃島薫; 安井武史
Oral presentation, Japanese, 生体医工学シンポジウム2019
07 Sep. 2019

光コムの位相制御性を活用した新奇分光応用
浅原彰文; 美濃島薫
Poster presentation, Japanese, 国際光デーシンポジウム2019
28 Jun. 2019

Laser scanning dual optical-frequency-comb spectromicroscopy
Shota Nakano; Takeo Minamikawa; Eiji Hase; Akifumi Asahara; Takahiko Mizuno; Hirotsugu Yamamoto; Kaoru Minoshima; Takeshi Yasui
Oral presentation, English, CLEO/Europe-EQEC 2019
27 Jun. 2019

New optical comb spectroscopy combined with optical vortex
Akifumi Asahara; Kaoru Minoshima
Invited oral presentation, English, The 41st PIERS 2019, Invited, International conference
19 Jun. 2019

Combination of lock-in detection with dual-comb spectroscopy
Hidenori Koresawa; Kyuki Shibuya; Akifumi Asahara; Takeo Minamikawa; Kaoru Minoshima; Takeshi Yasui
Poster presentation, English, CLEO:2019
09 May 2019

Orbital Angular Momentum-resolved Dual-comb Spectroscopy towards Topological Material Studies
Akifumi Asahara; Takuto Adachi; Yue Wang; Kaoru Minoshima
Oral presentation, English, CLEO:2019
06 May 2019

Dual-comb Spectroscopy Technique for Magneto-optic Effect Measurements
Takuto Adachi; Akifumi Asahara; Yusuke Odagiri; Masayuki Shirakawa; Yue Wang; Chikako Ishibashi; Satoshi Hatano; Eiji Tokunaga; Kaoru Minoshima
Poster presentation, English, ALPS2019
24 Apr. 2019

Development of Dual-Comb Faraday Effect Measurement Equipment
Yusuke Odagiri; Akifumi Asahara; Takuto Adachi; Masayuki Shirakawa; Yue Wang; Chikako Ishibashi; Satoshi Hatano; Eiji Tokunaga; Kaoru Minoshima
Poster presentation, English, ALPS2019
24 Apr. 2019

Rapid Characterization of Orbital Angular Momentum Spectrum of Arbitrary Optical Vortex using Dual-comb Spectroscopy
Akifumi Asahara; Takuto Adachi; Yue Wang; Kaoru Minoshima
Oral presentation, English, ALPS2019
22 Apr. 2019

軌道角運動量分解デュアル光渦コム分光法の開発
浅原彰文; 足立拓斗; 王月; 美濃島薫
Invited oral presentation, Japanese, 第66回応用物理学会春季学術講演会
09 Mar. 2019

デュアルコム分光法によるファラデー回転測定
足立拓斗; 浅原彰文; 小田切雄介; 白川正之; 王月; 石橋爾子; 波多野智; 徳永英司; 美濃島薫
Oral presentation, Japanese, 第66回応用物理学会春季学術講演会
09 Mar. 2019

レーザー走査型光コム分光顕微鏡による偏光計測
中野 祥汰; 南川 丈夫; 長谷 栄治; 浅原 彰文; 水野 孝彦; 山本 裕紹; 美濃島 薫; 安井 武史
Oral presentation, Japanese, 第66回応用物理学会春季学術講演会
09 Mar. 2019

デュアルコム分光による磁性材料の高速ファラデー回転角測定
足立拓斗; 浅原彰文; 小田切雄介; 白川正之; 王月; 石橋爾子; 波多野智; 徳永英司; 美濃島薫
Poster presentation, Japanese, 第19回レーザー学会東京支部研究会
08 Mar. 2019

Multi-comb coherent control for material studies
Kaoru Minoshima; Akifumi Asahara
Invited oral presentation, English, APS March Meeting 2019, International conference
05 Mar. 2019

レーザー走査型光コム顕微鏡の開発
中野 祥汰; 南川 丈夫; 長谷 栄治; 浅原 彰文; 水野 孝彦; 山本 裕紹; 安井 武史
Poster presentation, Japanese, LED総合フォーラム2019 in 徳島
23 Feb. 2019

デュアル光コムビートと2次元周波数多重化によるスキャンレス全視野蛍光イメージング
是澤秀紀; 澁谷九輝; 浅原彰文; 南川丈夫; 美濃島薫; 安井武史
Poster presentation, Japanese, LED総合フォーラム2019 in 徳島
23 Feb. 2019

光コムによる多彩な精密位相制御と固体分光応用
浅原彰文; 美濃島薫
Invited oral presentation, Japanese, 光波シンセシス研究グループ研究会「光の絶対位相制御と分光計測・物質操作への応用」, Domestic conference
12 Feb. 2019

Dual-comb-based asynchronous optical sampling to evaluate transient response of quantum dots
Tomohito Saito; Akifumi Asahara; Kaoru Minoshima; Junko Ishi-Hayase
Poster presentation, English, Photonics West, SPIE OPTO
06 Feb. 2019

Combination of lock-in detection with dual-comb spectroscopy
Hidenori Koresawa; Kyuki Shibuya; Akifumi Asahara; Takeo Minamikawa; Kaoru Minoshima; Takeshi Yasui
Oral presentation, English, OPTO2019 in Photonics West 2019
06 Feb. 2019

チャープした光コムの和周波発生を用いた無走査３次元計測の対象拡大
田中優理奈; 加藤峰士; 内田めぐみ; 浅原彰文; 美濃島薫
Oral presentation, Japanese, レーザー学会学術講演会第39回年次大会
14 Jan. 2019

デュアルコム分光法の磁気光学特性評価への適用拡大
浅原彰文; 足立拓斗; 小田切雄介; 白川正之; 王月; 石橋爾子; 波多野智; 徳永英司; 美濃島薫
Oral presentation, Japanese, レーザー学会学術講演会第39回年次大会
14 Jan. 2019

デュアルコム分光法によるファラデー効果測定装置の開発
小田切雄介; 浅原彰文; 足立拓斗; 白川正之; 王月; 石橋爾子; 波多野智; 徳永英司; 美濃島薫
Oral presentation, Japanese, レーザー学会学術講演会第39回年次大会
14 Jan. 2019

ステップ状試料を用いたデュアルコム分光による屈折率精密測定
王月; 浅原彰文; 庄司一郎; 野竹孝志; 南出泰亜; 美濃島薫
Oral presentation, Japanese, レーザー学会学術講演会第39回年次大会
14 Jan. 2019

光コムと光渦を組み合わせた時空間干渉計測
浅原彰文; 美濃島薫
Oral presentation, Japanese, 東北大電気通信研究所 共同プロジェクト研究会
12 Dec. 2018

Multi-comb technique for metrological applications with coherent control of optical pulse train
K. Minoshima; A. Asahara
Invited oral presentation, English, Fourier Transform Spectroscopy (FTS) 2018, Invited, International conference
06 Nov. 2018

Use of Lock-in Detection in Dual-Comb Spectroscopy
Hidenori Koresawa; Kyuki Shibuya; Akifumi Asahara; Takeo Minamikawa; Kaoru Minoshima; Takeshi Yasui
Oral presentation, English, Fourier Transform Spectroscopy (FTS) 2018
06 Nov. 2018

光コムによる時間領域コヒーレント分光
浅原 彰文
Invited oral presentation, Japanese, OPJ2018, Invited, Domestic conference
02 Nov. 2018

固体材料の位相屈折率測定のためのデュアルコム分光法の高度化
王 月; 浅原 彰文; 庄司 一郎; 野竹 孝志; 南出 泰亜; 美濃島 薫
Oral presentation, Japanese, OPJ2018, Domestic conference
01 Nov. 2018

Precise interferometric measurements for information along azimuth axis using dual-optical-vortex-comb spectroscopy
浅原 彰文; 王 月; 美濃島 薫
Oral presentation, Japanese, 第79回応用物理学会秋季学術講演会
20 Sep. 2018

Spatio-temporal manipulation of light waves by use of optical frequency combs
K. Minoshima; A. Asahara
Invited oral presentation, English, Frontiers in Optics (FiO), Invited, International conference
20 Sep. 2018

デュアルコム分光による位相屈折率の精密測定法の開発
王 月; 浅原 彰文; 庄司 一郎; 野竹 孝志; 南出 泰亜; 美濃島 薫
Oral presentation, Japanese, 第79回応用物理学会秋季学術講演会
19 Sep. 2018

レーザー走査型共焦点光コム分光顕微鏡の開発
中野 祥汰; 南川 丈夫; 長谷 栄治; 浅原 彰文; 水野 孝彦; 山本 裕紹; 美濃島 薫; 安井 武史
Oral presentation, Japanese, 第79回応用物理学会秋季学術講演会
19 Sep. 2018

ロックイン検出型デュアル光コム分光法
是澤 秀紀; 澁谷 九輝; 浅原 彰文; 南川 丈夫; 美濃島 薫; 安井 武史
Oral presentation, Japanese, 第79回応用物理学会秋季学術講演会
18 Sep. 2018

Dual-comb polarization spectroscopy for optical material characterization
浅原 彰文; 白川 正之; 王 月; 徳永 英司; 美濃島 薫
Oral presentation, Japanese, 日本物理学会2018年秋季大会
10 Sep. 2018

High-resolution no-scanning 3D image detection using sum-frequency generation of chirped optical frequency combs
Y. Tanaka; T. Kato; M. Uchida; A. Asahara; K. Minoshima
Oral presentation, English, CLEO-PR:2018
02 Aug. 2018

Spatially scanning dual-comb spectroscopy for precise measurement of refractive index and thickness profiles of solids
Y. Wang; A. Asahara; K. Kondo; K. Minoshima
Oral presentation, English, CLEO-PR:2018
01 Aug. 2018

Coherent control and interferometric detection of lateral beam profile by use of dual-optical vortex comb
A. Asahara; S. Shoji; K. Kondo; Y. Wang; K. Minoshima
Oral presentation, English, Ultrafast Phenomena: 2018 (UP2018), International conference
17 Jul. 2018

Coherent spatiotemporal phase control by combining optical frequency combs and optical vortices
Akifumi Asahara; Satoru Shoji; Ken-ichi Kondo; Yue Wang; Kaoru Minoshima
Oral presentation, English, CLEO:2018
15 May 2018

Metrological Applications Using Coherent Controllability of Optical Combs
A. Asahara; K. Minoshima
Invited oral presentation, English, LSC2018, Invited, International conference
27 Apr. 2018

No-scanning 3D image detection with sum-frequency generation of optical frequency combs
Y. Tanaka; T. Kato; M. Uchida; A. Asahara; K. Minoshima
Oral presentation, English, ALPS2018
24 Apr. 2018

Simultaneous measurement of refractive index and thickness profiles of solids based on dual-comb spectroscopy
Y. Wang; A. Asahara; K. Kondo; K. Minoshima
Oral presentation, English, ALPS2018
24 Apr. 2018

デュアルコム分光による屈折率分布の精密測定法の開発
王 月; 浅原 彰文; 近藤 健一; 美濃島 薫
Oral presentation, Japanese, 第65回応用物理学会春季学術講演会
20 Mar. 2018

チャープした光コムの和周波発生を用いた無走査3次元計測における高分解能イメージ検出
田中優理奈; 加藤峰士; 内田めぐみ; 浅原彰文; 美濃島薫
Oral presentation, Japanese, 第65回応用物理学会春季学術講演会
19 Mar. 2018

Rotational Optical Manipulation using Dual-Optical Vortex Combs
Akifumi Asahara; Satoru Shoji; Ken-ichi Kondo; Yue Wang; Kaoru Minoshima
Oral presentation, Japanese, 第65回応用物理学会春季学術講演会
19 Mar. 2018

光周波数コムの固体物性・コヒーレント計測への新しい応用
浅原 彰文; 近藤 健一; 王 月; 美濃島 薫
Poster presentation, Japanese, 日本光学会フォトダイナミズム研究グループシンポジウム
05 Feb. 2018

偏波保持ファイバを用いたオールファイバ型デュアルコム分光計の開発
王 月; 浅原 彰文; 近藤 健一; 美濃島 薫
Poster presentation, Japanese, 日本光学会 コンテンポラリーオプティクス研究会
05 Dec. 2017

チャープした光コムの和周波発生を用いた無走査3次元計測法における計測分解能の改善
田中優理奈; 内田めぐみ; 加藤峰士; 浅原彰文; 美濃島薫
Poster presentation, Japanese, 日本光学会 コンテンポラリーオプティクス研究会
05 Dec. 2017

光周波数コムによる自在なコヒーレント計測
浅原 彰文; 美濃島 薫
Invited oral presentation, Japanese, 超⾼速光エレクトロニクス（UFO）研究会 第3回研究会「先端レーザーによる超⾼速科学」, Invited, Domestic conference
17 Nov. 2017

Chirp optimization in no-scanning 3D imaging method with sum-frequency generation of optical frequency comb
田中優理奈; 内田めぐみ; 加藤峰士; 浅原彰文; 美濃島薫
Oral presentation, Japanese, OPJ2017
02 Nov. 2017

Development of dual comb spectroscopy for measurement of group refractive index and rapid dispersion of optical materials
近藤 健一; 浅原 彰文; 王 月; 庄司一郎; 美濃島 薫
Oral presentation, Japanese, OPJ2017
01 Nov. 2017

All-fiber-based dual-comb spectroscopic system with polarization maintaining fiber
王 月; 浅原 彰文; 近藤 健一; 美濃島 薫
Oral presentation, Japanese, OPJ2017
01 Nov. 2017

Tailoring the fiber-based frequency combs for metrology application with coherent control
Kaoru Minoshima; Akifumi Asahara; Ken-ichi Kondo; Yue Wang
Invited oral presentation, English, Advanced Solid State Lasers (ASSL) Conference 2017, Invited, International conference
04 Oct. 2017

Relative CEP control of dual-comb for solid-state physics
A. Asahara; K. Kondo; Y. Wang; K. Minoshima
Oral presentation, Japanese, 日本物理学会2017年度秋季大会
21 Sep. 2017

光コムの位相制御性を生かした新たな応用の展開
浅原 彰文; 美濃島 薫
Invited oral presentation, Japanese, 2017年度精密工学会秋季大会学術講演会, Domestic conference
20 Sep. 2017

Precise Phase Control of Optical Vortex with Optical Comb and its Applications
Akifumi Asahara; Ken-ichi Kondo; Yue Wang; Kaoru Minoshima
Oral presentation, Japanese, 第78回応用物理学会秋季学術講演会
06 Sep. 2017

Temperature measurement by all-fiber based dual-comb spectrometer with FBG
Yue Wang; Akifumi Asahara; Ken-ichi Kondo; Kaoru Minoshima
Oral presentation, Japanese, 第78回応用物理学会秋季学術講演会
06 Sep. 2017

Precision measurement of group refractive index and dispersion property of optical materials by dual-comb spectroscopy
近藤 健一; 浅原 彰文; 王 月; 庄司一郎; 美濃島 薫
Oral presentation, Japanese, 第78回応用物理学会秋季学術講演会
05 Sep. 2017

Dual-Comb Optical Synthesizer for Arbitrary Coherent Measurement
A. Asahara; K. Minoshima
Invited oral presentation, English, The 24th Congress of the International Commission for Optics (ICO-24), Invited, International conference
24 Aug. 2017

Rapid Evaluation Method of Anisotropy by Dual Comb Spectroscopy
Ken-ichi Kondo; Akifumi Asahara; Yue Wang; Ichiro Shoji; Kaoru Minoshima
Oral presentation, English, The 24th Congress of the International Commission for Optics (ICO-24), International conference
22 Aug. 2017

One-shot 3D measurement method using nonlinear optical gating with a chirped optical frequency comb
Y. Tanaka; M. Uchida; T. Kato; A. Asahara; K. Minoshima
Poster presentation, English, The 24th Congress of the International Commission for Optics (ICO-24), International conference
22 Aug. 2017

Development of All-Fiber-Type Dual-Comb Spectrometer
Y. Wang; A. Asahara; K. Kondo; K. Minoshima
Poster presentation, English, The 24th Congress of the International Commission for Optics (ICO-24), International conference
22 Aug. 2017

Portable and Stable Dual-Comb Spectroscopic System Based on All-Fiber Setup
Yue Wang; Akifumi Asahara; Ken-ichi Kondo; Kaoru Minoshima
Poster presentation, English, The 12th Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR 2017), International conference
03 Aug. 2017

Coherent Modulation of Interference Signals in Dual-Comb Spectroscopy
Akifumi Asahara; Ken-ichi Kondo; Yue Wang; Kaoru Minoshima
Oral presentation, English, The 12th Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR 2017), International conference
02 Aug. 2017

Precise Birefringence Measurement of Anisotropic Materials by Dual-Comb Spectroscopy
Ken-ichi Kondo; Akifumi Asahara; Yue Wang; Ichiro Shoji; Kaoru Minoshima
Oral presentation, English, The 12th Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR 2017), International conference
01 Aug. 2017

Coherent Control of Relative Carrier Envelope Phase in Dual-Comb Spectroscopy
Akifumi Asahara; Ken-ichi Kondo; Yue Wang; Kaoru Minoshima
Oral presentation, English, CLEO: 2017 (Conference on Lasers and Electro-Optics), International conference
19 May 2017

Application of Relative Carrier Envelope Offset Frequency for Coherent Control in Dual-Comb Configuration
Akifumi Asahara; Ken-ichi Kondo; Yue Wang; Kaoru Minoshima
Oral presentation, English, The 6th Advanced Lasers and Photon Sources (ALPS’17), International conference
18 Apr. 2017

Development of Rapid Evaluation Method of anisotropy of Nonlinear Optical Materials by Dual Comb Spectroscopy
Ken-ichi Kondo; Akifumi Asahara; Yue Wang; Kaoru Minoshima
Oral presentation, English, The 6th Advanced Lasers and Photon Sources (ALPS’17), International conference
18 Apr. 2017

Time-domain dual-comb spectroscopy for solid-state physics
Akifumi Asahara
Oral presentation, English, The fourth MIPT-LPI-UEC Joint Workshop
27 Mar. 2017

光物性研究のための時間分解デュアルコム分光法の開発
浅原 彰文; 近藤 健一; 王 月; 美濃島 薫
Oral presentation, Japanese, 日本物理学会第72回年次大会
18 Mar. 2017

オールファイバ型デュアルコム分光システムの開発
王 月; 浅原 彰文; 近藤 健一; 美濃島 薫
Oral presentation, Japanese, 第64回応用物理学会春季学術講演会
17 Mar. 2017

デュアルコムの相対キャリアエンベロープ位相制御によるコヒーレント分光への展開
浅原 彰文; 近藤 健一; 王 月; 美濃島 薫
Oral presentation, Japanese, 第64回応用物理学会春季学術講演会
16 Mar. 2017

デュアルコム分光による非線形光学材料の異方性評価法の開発
近藤 健一; 浅原 彰文; 王 月; 庄司 一郎; 美濃島 薫
Oral presentation, Japanese, 第64回応用物理学会春季学術講演会
15 Mar. 2017

デュアルコム分光による量子ドットの過渡応答評価
新井 悠人; 浅原 彰文; 美濃島 薫; 赤羽 浩一; 早瀬 潤子
Oral presentation, Japanese, 第64回応用物理学会春季学術講演会
15 Mar. 2017

非線形光学材料の高速な異方性評価のためのデュアルコム分光
近藤 健一; 浅原 彰文; 王 月; 庄司 一郎; 美濃島 薫
Poster presentation, Japanese, 第17回レーザー学会東京支部研究会
07 Mar. 2017

オールファイバ型デュアルコム分光器による汎用的高精度分光システムの開発
王 月; 浅原 彰文; 近藤 健一; 美濃島 薫
Poster presentation, Japanese, 第17回レーザー学会東京支部研究会
07 Mar. 2017

Ultrafast Spectroscopy using Dual Optical Frequency Combs
Akifumi Asahara
Oral presentation, English, Photonics and Laser Technology Symposium
20 Jan. 2017

デュアルコムによる変調ポンププローブ分光法の開発
浅原 彰文; 近藤 健一; 王 月; 美濃島 薫
Oral presentation, Japanese, レーザー学会学術講演会第37回年次大会
09 Jan. 2017

デュアルコム分光による異方性材料の精密複素光学特性評価
近藤 健一; 浅原 彰文; 王 月; 美濃島 薫
Oral presentation, Japanese, レーザー学会学術講演会第37回年次大会
07 Jan. 2017

デュアル光コムを用いた超高速分光
浅原 彰文; 美濃島 薫
Oral presentation, Japanese, 東北大学電気通信研究所 共同プロジェクト研究会
08 Dec. 2016

デュアルコムの時間分解コヒーレント分光と固体物性への応用
浅原 彰文; 近藤 健一; 美濃島 薫
Invited oral presentation, Japanese, 第4回 超高速光エレクトロニクス研究会, Domestic conference
25 Nov. 2016

希土類材料の複素光学特性評価ためのデュアルコム分光
近藤 健一; 浅原 彰文; 美濃島 薫
Oral presentation, Japanese, Optics & Photonics Japan 2016 (OPJ2016), Domestic conference
Nov. 2016

デュアルコムを用いた多次元超高速分光の固体物性への応用
浅原 彰文; 近藤 健一; 美濃島 薫
Oral presentation, Japanese, Optics & Photonics Japan 2016 (OPJ2016), Domestic conference
Nov. 2016

デュアルコム分光による光学材料の複屈折測定の開発
近藤 健一; 浅原 彰文; 美濃島 薫
Poster presentation, Japanese, 日本光学会 コンテンポラリーオプティクス研究会
05 Oct. 2016

天文観測用NbTiN超伝導薄膜の動的THz光学特性
浅原 彰文; 西村 優里; 西谷 純一; 末元 徹; 山本 智
Poster presentation, Japanese, 第77回応用物理学会年次大会, Domestic conference
Sep. 2016

デュアルコム分光によるレーザー媒質の複素光学特性の高速測定
近藤 健一; 浅原 彰文; 美濃島 薫
Oral presentation, Japanese, 第77回応用物理学会年次大会, Domestic conference
Sep. 2016

時間分解デュアルコム分光法による複素光学物性ダイナミクスの精密計測
浅原 彰文; 近藤 健一; 美濃島 薫
Oral presentation, Japanese, 第77回応用物理学会年次大会, Domestic conference
Sep. 2016

Time-Resolved Fourier Measurement for Semiconductors by Near-Infrared Dual-Comb Spectroscopy
A. Asahara; A. Nishiyama; S. Yoshida; K. Kondo; Y. Nakajima; K. Minoshima
Poster presentation, English, International Conference on Ultrafast Phenomena 2016 (UP 2016), International conference
20 Jul. 2016

Dual-Comb Spectroscopy for Solid-State Physics and Extension toward Time-Resolved Measurement
Akifumi Asahara; Akiko Nishiyama; Satoru Yoshida; Ken-ichi Kondo; Yoshiaki Nakajima; Kaoru Minoshima
Oral presentation, English, CLEO: 2016 (Conference on Lasers and Electro-Optics), International conference
08 Jun. 2016

Time-Domain Measurements for Characterization of Solids by Dual-Comb Spectroscopy and Asynchronous Optical Sampling
Akifumi Asahara; Akiko Nishiyama; Satoru Yoshida; Ken-ichi Kondo; Yoshiaki Nakajima; Kaoru Minoshima
Oral presentation, English, The 5th Advanced Lasers and Photon Sources (ALPS’16)
17 May 2016

Mode filtering of fiber-based optical frequency comb by use of Fabry-Perot cavities and its application
S. Yoshida; A. Nishiyama; A. Asahara; Y. Nakajima; K. Minoshima
Oral presentation, English, The 5th Advanced Lasers and Photon Sources (ALPS’16)
17 May 2016

デュアルコム分光法の高分解能Rb原子分光への応用
西山 明子; 浅原 彰文; 吉田 悟; 中嶋 善晶; 美濃島 薫
Oral presentation, Japanese, 第16回分子分光研究会, Domestic conference
May 2016

時間分解デュアルコム分光法の開発と固体光物性研究への応用
浅原 彰文; 西山明子; 吉田悟; 近藤健一; 中嶋善晶; 美濃島薫
Oral presentation, Japanese, 第63回応用物理学会春季学術講演会
21 Mar. 2016

固体物性評価のための時間分解デュアルコム分光法の開発
浅原 彰文; 西山 明子; 吉田 悟; 近藤 健一; 中嶋 善晶; 美濃島 薫
Poster presentation, Japanese, 第16回レーザー学会東京支部研究会
04 Mar. 2016

MgO立方体結晶からの室温紫外レーザー発振
相馬 遥香; 上中 友紀; 浅原 彰文; 末元 徹; 内野 隆司
Oral presentation, Japanese, 第63回応用物理学会春季学術講演会, Domestic conference
Mar. 2016

デュアルコム分光法によるRb原子の高分解能分光
西山 明子; 浅原 彰文; 吉田 悟; 中嶋 善晶; 美濃島 薫
Oral presentation, Japanese, 第63回応用物理学会春季学術講演会, Domestic conference
Mar. 2016

THz conductivity characterized by localized carriers in nanogranular λ-Ti_3O_5
Asahara A.; Watanabe H.; Tokoro H.; Ohkoshi S.; Suemoto T.
Japanese, Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS)
26 Aug. 2013
26 Aug. 2013- 26 Aug. 2013

26aEJ-7 Time-resolved Faraday rotation measurement in photoinduced phase transitions of rubidium manganese hexacyanoferrate
Asahara A.; Tokoro H.; Ohkoshi S.; Suemoto T.
Japanese, Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS)
26 Mar. 2013
26 Mar. 2013- 26 Mar. 2013

18pHC-15 Femtosecond time-resolved Faraday effect in a photomagnetic cyano-complex
Asahara A.; Nakajima M.; Ishige S.; Tokoro H.; Ohkoshi S.; Suemoto T.
Japanese, Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS)
24 Aug. 2012
24 Aug. 2012- 24 Aug. 2012

18aPSB-22 Excitation intensity dependence of photo-induced phase transition in a cyano-complex
Ishige S.; Fukaya R.; Asahara A.; Tokoro H.; Ohkoshi S.; Suemoto T.
Japanese, Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS)
24 Aug. 2012
24 Aug. 2012- 24 Aug. 2012

24pPSB-9 Observation of photoinduced domain growth in a cyano-complex
Asahara A.; Nakajima M.; Fukaya R.; Ishige S.; Tokoro H.; Ohkoshi S.; Suemoto T.
Japanese, Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS)
05 Mar. 2012
05 Mar. 2012- 05 Mar. 2012

21aTC-14 Femtosecond phase boundary dynamics of photoinduced phase transition in a cyano-complex
Asahara A.; Nakajima M.; Fukaya R.; Tokoro H.; Ohkoshi S.; Suemoto T.
Japanese, Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS)
24 Aug. 2011
24 Aug. 2011- 24 Aug. 2011

25aHC-6 Femtosecond C≡N vibrational spectroscopy of bidirectional photoinduced phase transition in rubidium manganese hexacyanoferrate
Asahara A.; Nakajima M.; Fukaya R.; Tokoro H.; Ohkoshi S.; Suemoto T.
Japanese, Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS)
03 Mar. 2011
03 Mar. 2011- 03 Mar. 2011

23aPS-46 Observation of photo-induced phase transition dynamics in LT-phase RbMnFe hexacyano-complex by transient CN oscillation spectroscopy
Asahara A.; Nakajima M.; Fukaya R.; Tokoro H.; Ohkoshi S.; Suemoto T.
Japanese, Meeting abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS)
01 Mar. 2010
01 Mar. 2010- 01 Mar. 2010

波動と光
2024
The University of Electro-Communications

光工学実験第一
2024
The University of Electro-Communications

光工学実験第一
2023
The University of Electro-Communications

光工学実験第一
2022
電気通信大学

光工学実験第一
2019
The University of Electro-Communications

日本光学会

レーザー学会

The Physical Society of Japan

The Japan Society of Applied Physics

Optica (formerly, Optical Society of America (OSA))

Material evaluation technology that is opened up by spectroscopy principle based on the direct acquisition of optical response function
美濃島 薫; 浅原 彰文
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, The University of Electro-Communications, Grant-in-Aid for Scientific Research (S), 本研究では、光波の応答関数として特性を直接得る分光技術原理を創出することを目的とし、マルチコム光源とマルチ分光技術の開発を行う。 本年度は、計画の初年度にあたり、複数の光コムどうしが精密な関係を持つ光源を高度化して波長域拡大を行うとともに、分光対象拡大のために重要な分光信号検出の高感度化手法を検討した。 まず、光源開発においては、技術蓄積のある近赤外1.5μm波長域のエルビウムドープファイバレーザーの光コム出力をもとに、独自技術であるリング型共振器の左右回転双方向出力による一体型デュアルコムレーザーを高度化した。分散補償した光ファイバ増幅器を開発してコヒーレンスを維持しながら高出力化するとともに、光コムの繰り返し周波数とキャリアエンベロープオフセット周波数信号を検出して性能を評価し、受動安定化の実現を確認した。次に、波長域拡大においては、双方向型デュアルコムレーザーの出力をもとに、高非線形ファイバと導波路型非線形光学結晶によって高効率な波長変換を行い、豊富な分子の指紋領域として応用上有用な波長2-4μm帯の中赤外光と可視光領域の広帯域光発生を実現した。デュアルコム分光に適用するためには高コヒーレンスが不可欠であるが、実際に中赤外光の双方向出力を用いて波長帯ごとに相互干渉信号を生成したところ、全帯域にわたりシングルショットでインターフェログラム信号検出に成功した。さらに環境ガスとして重要なN2Oガスセルに適用して基礎特性評価を行い、中赤外分光への適用性を実証した。 さらに、光コムの位相制御を活用し、分光信号の高感度取得法を考案した。光コムの2つの周波数パラメータを電気的に制御し、動的な光干渉信号波形の位相を制御することによって分光情報の高感度化手法を実現した。シミュレーションと基礎実験を行って手法原理の妥当性を検証し、環境変動による長期不安定性に有効であることを示した。, 21H05014
05 Jul. 2021 - 31 Mar. 2026

光コム分光を駆使した光渦メタマテリアル物性の研究
01 Apr. 2021 - 31 Mar. 2024

デュアル光磁場コムを用いたメタマテリアル近接場の複素透磁率分光法の開発
安井 武史; 田中 拓男; 岡本 敏弘; 南川 丈夫; 浅原 彰文
日本学術振興会, 科学研究費助成事業, 徳島大学, 挑戦的研究(萌芽), ２組のエルビウム添加フィバー光コム（中心波長=1550nm、スペクトル幅=50nm、繰り返し周波数=100MHz）を用いて、デュアル光電場コム分光装置の構築を行った。測定用光コムから出力された光は、サンプル光とリファレンス光に分割され、サンプル光がサンプルを通った後、再びリファレンス光と重ねられる。その後、偏光ビームスプリッタで読み出し用（局部発振器用）光コムと干渉させ、バンドパスフィルタで帯域制限を行った後、光検出器で検出する。取得したインターフェログラムをフーリエ変換することにより、光電場コムのモード分解振幅コムとモード分解位相コムを取得した。 構築した装置の基本特性を評価するため、複素屈折率スペクトルが既知の標準サンプルを計測したところ、複素屈折率（屈折率、消衰係数）が文献値と同じであることを確認した。次に、メタマテリアル模擬サンプルとして、金ナノ粒子濃度の異なる透過性光学材料を計測した。その結果、金ナノ粒子濃度の依存性を確認した。, 21K18727
09 Jul. 2021 - 31 Mar. 2023

Noninvasive biomedical imaging using optical-comb microscopy
MINAMIKAWA Takeo
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, The University of Tokushima, Grant-in-Aid for Scientific Research (B), In this study, we developed a novel optical microscope, namely "optical frequency comb microscope", which utilizes the optical frequency comb. The optical frequency comb is an extreme light source and involves simultaneous measurement capability of the light intensity and phase because of its ultra-long coherence. We have realized three-dimensional optical constant distribution imaging with submicrometer resolution, which was challenging to achieve so far. We also applied the optical frequency comb microscope to biological imaging, clarifying the possibility of a novel non-invasive biological imaging method based on a three-dimensional optical constant distribution., 18H01901
01 Apr. 2018 - 31 Mar. 2021

光周波数コムと光渦を用いた角度計測技術の研究
精密測定技術振興財団, 精密測定技術振興のための調査・研究事業
Apr. 2020 - Mar. 2021

デュアルコムを用いたコヒーレント分光法の開発
浅原彰文
Principal investigator
Apr. 2017 - Mar. 2019

テラヘルツ分光用ヘテロダイン超伝導ミクサ素子の光物性研究に根ざした開発
浅原 彰文
Principal investigator
01 Apr. 2015 - 31 Jul. 2015

光磁性スイッチング錯体における超高速スピンダイナミクスの観測
浅原 彰文
Principal investigator
01 Apr. 2013 - 31 Mar. 2015

位相屈折率の導出方法、試料、位相屈折率の測定装置
Patent right, 美濃島薫, 浅原彰文, 特願2018-165528, Date applied: 04 Sep. 2018, 特許7270202 (P7270202), Date registered: 27 Apr. 2023

デュアルコム分光法における干渉信号の測定方法
Patent right, 特願2018-247417, Date applied: 28 Dec. 2018, 特許7128516 (P7128516)

光コムの制御方法及び光コムの制御装置
Patent right, 美濃島薫, 浅原彰文, 特願2017-037766, Date applied: 28 Feb. 2017, The University of Electro-Communications, 特許6963322 (P6963322)