Frequency-swept discrete Fourier transform spectroscopy ~demonstration and application in THz and near-infrared region~

• Project/Area Number: 26246031
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Optical engineering, Photon science
• Research Institution: The University of Tokushima
• Principal Investigator: YASUI TAKESHI 徳島大学, 大学院理工学研究部, 教授 (70314408)
• Co-Investigator(Kenkyū-buntansha): 岩田 哲郎 徳島大学, ソシオテクノサイエンス研究部, 教授 (50304548) ; 橋本 守 大阪大学, 基礎工学研究科, 准教授 (70237949) ; 木戸口 善行 徳島大学, ソシオテクノサイエンス研究部, 教授 (70294717) ; 埴淵 昌毅 徳島大学, 大学院医歯薬学研究部, 准教授 (80335794)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥40,560,000 (Direct Cost: ¥31,200,000、Indirect Cost: ¥9,360,000); Fiscal Year 2016: ¥8,320,000 (Direct Cost: ¥6,400,000、Indirect Cost: ¥1,920,000); Fiscal Year 2015: ¥21,840,000 (Direct Cost: ¥16,800,000、Indirect Cost: ¥5,040,000); Fiscal Year 2014: ¥10,400,000 (Direct Cost: ¥8,000,000、Indirect Cost: ¥2,400,000)
• Keywords: フーリエ変換分光 / テラヘルツ分光 / 赤外分光 / ガス分析 / 応用光学・量子光工学 / リモートセンシング / 量子エレクトロニクス

Outline of Final Research Achievements

In this research, we demonstrated improved spectral resolution by overcoming the time window size limitation using a mode-locked terahertz (THz) or near-infrared (NIR) pulse train as precisely periodic pulsed radiation in discrete Fourier transform spectroscopy (dFTS). Since infinitesimal resolution can be achieved at harmonic components of its repetition frequency 1/T when the time window size is exactly matched to the repetition period T, a combination of dFTS with a spectral interleaving technique achieves a spectral resolution only limited by the spectral interleaving interval.

Research Products

• [Int'l Joint Research] University of the Littoral Opal Coast/Bordeaux University(フランス)
• [Int'l Joint Research] Beihang University(中国)
• [Int'l Joint Research] 北京航空航天大学(中国)
• [Int'l Joint Research] ボルドー大学(フランス)
• [Journal Article] Measurement of absolute frequency of continuous-wave terahertz radiation in real time using a free-running, dual-wavelength mode-locked, erbium-doped fibre laser (2017)
  • Author(s): Guoqing Hu, Tatsuya Mizuguchi, Xin Zhao, Takeo Minamikawa, Takahiko Mizuno, Yuli Yang, Cui Li, Ming Bai, Zheng Zheng, and Takeshi Yasui
  • Journal Title: Sci. Reports Volume: 7 Issue: 1 Pages: 42082-42082
  • DOI: 10.1038/srep42082
  • NAID: 120006534980
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Terahertz frequency-domain spectroscopy of low-pressure acetonitrile gas by a photomixing terahertz synthesizer referenced to dual optical frequency combs (2016)
  • Author(s): Yi-Da Hsieh, Hiroto Kimura, Kenta Hayashi, Takeo Minamikawa, Yasuhiro Mizutani, Hirotsugu Yamamoto, Tetsuo Iwata, Hajime Inaba, Kaoru Minoshima, Francis Hindle, and Takeshi Yasui
  • Journal Title: J. Infrared, Millimeter, and Terahertz Waves Volume: 37 Issue: 9 Pages: 903-915
  • DOI: 10.1007/s10762-016-0277-6
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Dynamic terahertz spectroscopy of gas molecules mixed with unwanted aerosol under atmospheric pressure using fibre-based asynchronous-optical-sampling terahertz time-domain spectroscopy (2016)
  • Author(s): Yi-Da Hsieh, Shota Nakamura, Dahi Ghareab Abdelsalam, Takeo Minamikawa, Yasuhiro Mizutani, Hirotsugu Yamamoto, Tetsuo Iwata, Francis Hindle, and Takeshi Yasui
  • Journal Title: Sci. Reports Volume: 6 Issue: 1 Pages: 28114-28114
  • DOI: 10.1038/srep28114
  • NAID: 120006534963
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] eal-Time Determination of Absolute Frequency in Continuous-Wave Terahertz Radiation with a Photocarrier Terahertz Frequency Comb Induced by an Unstabilized Femtosecond Laser (2016)
  • Author(s): Takeo Minamikawa, Kenta Hayashi, Tatsuya Mizuguchi, Yi-Da Hsieh, Dahi Ghareab Abdelsalam, Yasuhiro Mizutani, Hirotsugu Yamamoto, Tetsuo Iwata, and Takeshi Yasui
  • Journal Title: Journal of Infrared, Millimeter, and Terahertz Waves Volume: 37 Issue: 5 Pages: 473-485
  • DOI: 10.1007/s10762-015-0237-6
  • Peer Reviewed
• [Journal Article] Near-infrared broadband dual-frequency-comb spectroscopy with a resolution beyond the Fourier limit determined by the observation time windows (2015)
  • Author(s): S. Okubo, Y.-D. Hsieh, H. Inaba, A. Onae, M. Hashimoto, and T. Yasui
  • Journal Title: Opt. Express Volume: 23 Issue: 26 Pages: 33184-339193
  • DOI: 10.1364/oe.23.033184
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Super-resolution discrete Fourier transform spectroscopy beyond time window size limitation using precisely periodic pulsed radiation (2015)
  • Author(s): T. Yasui, Y. Iyonaga, Y.-D. Hsieh, Y. Sakaguchi, F. Hindle, S. Yokoyama, T. Araki, and M. Hashimoto
  • Journal Title: Optica Volume: 2
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Adaptive sampling dual terahertz comb spectroscopy using dual free-running femtosecond lasers (2015)
  • Author(s): T. Yasui, R. Ichikawa, Y.-D. Hsieh, K. Hayashi, H. Cahyadi, F. Hindle, Y. Sakaguchi, T. Iwata, Y. Mizutani, H. Yamamoto, K. Minoshima, and H. Inaba
  • Journal Title: Sci. Rep. Volume: 5
  • NAID: 120006875682
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Real-time absolute frequency measurement of continuous-wave terahertz radiation based on dual terahertz combs of photocarriers with different frequency spacings (2015)
  • Author(s): T. Yasui, K. Hayash, R. Ichikawa, H. Cahyadi, Y.-D. Hsieh, Y. Mizutani, H. Yamamoto, T. Iwata, H. Inaba, and K. Minoshima
  • Journal Title: Opt. Express Volume: 23 Pages: 11367-11377
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Phase-slope and phase measurements of tunable CW-THz radiation with terahertz comb for wide-dynamic-range, high-resolution, distance measurement of optically rough object (2014)
  • Author(s): T. Yasui, M. Fujio, S. Yokoyama, and T. Araki
  • Journal Title: Opt. Express Volume: 22 Issue: 14 Pages: 17349-17359
  • DOI: 10.1364/oe.22.017349
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] デュアル光コム分光のための２波長ファイバー光コム光源 (2017)
  • Author(s): 水口達也，Guoqing Hu，南川丈夫，荒木勉，Zheng Zheng，安井武史
  • Organizer: レーザー学会学術講演会第37回年次大会
  • Place of Presentation: 徳島大学（徳島県徳島市）
• [Presentation] ２波長独立モード同期ファイバーレーザーを用いた非同期光サンプリング式テラヘルツ時間領域分光法 (2017)
  • Author(s): 水口 達也, Guoqing Hu, 南川 丈夫, Zheng Zheng, 安井 武史
  • Organizer: 第64回応用物理学会春季学術講演会
  • Place of Presentation: パシフィコ横浜（神奈川県横浜市）
• [Presentation] デュアル光コム分光エリプソメトリー (2016)
  • Author(s): 南川 丈夫, 謝 宜達, 澁谷 九輝, 兼岡 良樹, 大久保 章, 稲場 肇, 水谷 康弘, 安井 武史, 岩田 哲郎
  • Organizer: 第63回応用物理学会春季学術講演会
  • Place of Presentation: 東京工業大学（東京都目黒区）
  • Year and Date: 2016-03-19
• [Presentation] デュアルTHzコム計測のための２波長モード同期Erファイバーレーザー (2016)
  • Author(s): Guoqing Hu , 水口 達也, 南川 丈夫, Zheng Zheng , 安井 武史
  • Organizer: 第63回応用物理学会春季学術講演会
  • Place of Presentation: 東京工業大学（東京都目黒区）
  • Year and Date: 2016-03-19
• [Presentation] 非制御フェムト秒レーザー励起フォトキャリアTHzコムを用いたCW-THz波のリアルタイム絶対周波数計測 (2016)
  • Author(s): 水口 達也, 林 健太, 南川 丈夫, 安井 武史
  • Organizer: 第63回応用物理学会春季学術講演会
  • Place of Presentation: 東京工業大学（東京都目黒区）
  • Year and Date: 2016-03-19
• [Presentation] アダプティブ・サンプリング式デュアルTHzコム分光法 (2016)
  • Author(s): 安井 武史
  • Organizer: 日本レーザー学会第36回年次大会
  • Place of Presentation: 名城大学（愛知県名古屋市）
  • Year and Date: 2016-01-09
  • Invited
• [Presentation] Super-resolution discrete Fourier transform spectroscopy beyond time window size limitation using precisely periodic THz pulse train (2016)
  • Author(s): Takeshi Yasui
  • Organizer: EMN (Energy Materials Nanotechnology) Meeting on Terahertz
  • Place of Presentation: NH Collection Aranzazu (San Sebastian, Spain)
  • Int'l Joint Research / Invited
• [Presentation] Discrete Fourier transform spectroscopy using precisely periodic THz pulse train (2016)
  • Author(s): Takeshi Yasui
  • Organizer: JSAP-OSA Joint Symposia 2017
  • Place of Presentation: 朱鷺メッセ（新潟県新潟市）
  • Int'l Joint Research / Invited
• [Presentation] Gapless dual THz comb spectroscopy (2016)
  • Author(s): Takeshi Yasui
  • Organizer: 41st International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz2016)
  • Place of Presentation: Bella Center (Copenhagen, Denmark)
  • Int'l Joint Research / Invited
• [Presentation] Dual-comb spectroscopy in the THz region (2016)
  • Author(s): Takeshi Yasui
  • Organizer: Light, Energy and the Environment Congress/Fourier Transform Spectroscopy (FTS2016)
  • Place of Presentation: Kongresshalle am Zoo Leipzig (Leipzig, Germany)
  • Int'l Joint Research / Invited
• [Presentation] 2波長モード同期ファイバーレーザーを用いたデュアルTHzコム参照型THz絶対周波数計測 (2016)
  • Author(s): 水口 達也, Guoqing Hu, 南川 丈夫, Zheng Zheng, 安井 武史
  • Organizer: 第77回応用物理学会秋季学術講演会
  • Place of Presentation: 朱鷺メッセ（新潟県新潟市）
• [Presentation] 動的THzガス分光とマルチピークフィッティングを用いた煙混在ガスの定量分析 (2016)
  • Author(s): 謝 宜達, 中村 翔太, 南川 丈夫, フランシス ヒンデル, 安井 武史
  • Organizer: 第77回応用物理学会秋季学術講演会
  • Place of Presentation: 朱鷺メッセ（新潟県新潟市）
• [Presentation] デュアル・テラヘルツ・コム分光を簡略化する2色モード同期ファイバーレーザー (2016)
  • Author(s): 安井武史 , 水口達也 , Guoqing Hu, 南川丈夫 , Zheng Zheng
  • Organizer: テラヘルツ科学の最先端III
  • Place of Presentation: 三国観光ホテル（福井県坂井市）
• [Presentation] A free-running, dual-wavelength, mode-locked Er:fiber laser based real-time determination of absolute frequency of continuous-wave terahertz radiation (2016)
  • Author(s): Guoqing Hu, Tatsuya Mizuguchi, Takeo Minamikawa, Zheng Zheng, and Takeshi Yasui
  • Organizer: 第１回フォトニクス研究会
  • Place of Presentation: 沖縄県青年会館（沖縄県那覇市）
• [Presentation] デュアルTHzコム分光のための2波長モード同期ファイバーレーザー (2016)
  • Author(s): 水口達也，Guoqing Hu ，南川丈夫，Zheng Zheng，安井武史
  • Organizer: 第１回フォトニクス研究会
  • Place of Presentation: 沖縄県青年会館（沖縄県那覇市）
• [Presentation] テラヘルツ波を用いた煙混在ガスのリアルタイム濃度センシング (2016)
  • Author(s): 水口達也, 南川 丈夫, 安井 武史
  • Organizer: LED総合フォーラム2016 in 徳島
  • Place of Presentation: あわぎんホール（徳島県徳島市）
• [Presentation] Adaptive sampling, terahertz dual comb spectroscopy using unstabilized dual lasers (2015)
  • Author(s): T. Mizuguchi, R. Ichikawa1, Y.-D. Hsieh, and T. Yasui
  • Organizer: The Asian Student Meeting On Photonics & Optics (Asian CORE Student Meeting 2015),
  • Place of Presentation: Osaka University (Osaka, Japan)
  • Year and Date: 2015-12-07
  • Int'l Joint Research
• [Presentation] デュアル光コム分光エリプソメトリーに関する基礎研究 (2015)
  • Author(s): 謝 宜達, 澁谷 九輝, 兼岡 良樹, 大久保 章, 稲場 肇, 水谷 康弘, 安井 武史 岩田哲郎
  • Organizer: Optics & Photonics Japan 2015
  • Place of Presentation: 筑波大学東京キャンパス文京校舎（東京都文京区）
  • Year and Date: 2015-10-28
• [Presentation] 国家標準にトレーサブルなコヒーレント周波数リンクに基づいたテラヘルツ周波数標準技術の系統的構築 (2015)
  • Author(s): 安井 武史
  • Organizer: 応用物理学会・テラヘルツ電磁波技術研究会 第 1 回研究討論会 / テラヘルツテクノロジーフォーラム 第1回テラテク技術セミナー「テラヘルツ領域の計測・標準と産業応用可能性」
  • Place of Presentation: 徳島大学（徳島県徳島市）
  • Year and Date: 2015-10-06
  • Invited
• [Presentation] 周波数標準にトレーサブルな THz 周波数シンセサイザーの開発 (2015)
  • Author(s): 謝宜達、稲場肇、美濃島薫、安井 武史
  • Organizer: 応用物理学会・テラヘルツ電磁波技術研究会 第 1 回研究討論会 / テラヘルツテクノロジーフォーラム 第1回テラテク技術セミナー「テラヘルツ領域の計測・標準と産業応用可能性」
  • Place of Presentation: 徳島大学（徳島県徳島市）
  • Year and Date: 2015-10-06
• [Presentation] 非制御フェムト秒レーザーを用いた CW-THz 波のリアルタイム精密周波数計測開発 (2015)
  • Author(s): 水口達也、林 建太、安井武史
  • Organizer: 応用物理学会・テラヘルツ電磁波技術研究会 第 1 回研究討論会 / テラヘルツテクノロジーフォーラム 第1回テラテク技術セミナー「テラヘルツ領域の計測・標準と産業応用可能性」
  • Place of Presentation: 徳島大学（徳島県徳島市）
  • Year and Date: 2015-10-06
• [Presentation] 知的テラヘルツ計測 (2015)
  • Author(s): 安井武史
  • Organizer: 第76回応用物理学会秋季学術講演会
  • Place of Presentation: 名古屋国際会議場（愛知県名古屋市）
  • Year and Date: 2015-09-13
  • Invited
• [Presentation] Real-time absolute frequency measurement of CW-THz radiation based on a free-running THz comb (2015)
  • Author(s): T. Ogura, K. Hayashi, K. Nagai, Y. Nakajima, H. Inaba, K. Minoshima, and T. Yasui
  • Organizer: CLEO Pacific Rim 2015
  • Place of Presentation: Busan Exhibition and Convention Center (Busan, Korea)
  • Year and Date: 2015-08-24
  • Int'l Joint Research
• [Presentation] Adaptive sampling, terahertz dual comb spectroscopy using unstabilized dual lasers (2015)
  • Author(s): T. Mizuguchi, R. Ichikawa, T. Matsumoto, Y.-D. Hsieh, K. Minoshima, H. Inaba, and T. Yasui
  • Organizer: CLEO Pacific Rim 2015
  • Place of Presentation: Busan Exhibition and Convention Center (Busan, Korea)
  • Year and Date: 2015-08-24
  • Int'l Joint Research
• [Presentation] Gas-phase spectroscopy using THz frequency synthesizer based on dual optical combs (2015)
  • Author(s): Y.-D. Hsieh, K. Hayashi, H. Inaba, K. Minoshima, and T. Yasui
  • Organizer: CLEO Pacific Rim 2015
  • Place of Presentation: Busan Exhibition and Convention Center (Busan, Korea)
  • Year and Date: 2015-08-24
  • Int'l Joint Research
• [Presentation] Dual optical comb spectroscopy using modified adaptive sampling method (2015)
  • Author(s): S. Miyamoto, Y.-D. Hsieh, K. Kotani, S. Okubo, H. Inaba, and T. Yasui
  • Organizer: CLEO Pacific Rim 2015
  • Place of Presentation: Busan Exhibition and Convention Center (Busan, Korea)
  • Year and Date: 2015-08-24
  • Int'l Joint Research
• [Presentation] Adaptive sampling dual THz comb spectroscopy using unstabilized dual fs lasers (2015)
  • Author(s): T. Yasui
  • Organizer: 3rd International Symposium on Microwave/Terahertz Science and Applications
  • Place of Presentation: Okinawa Institute of Science and Technology Graduate University (Okinawa, Japan)
  • Year and Date: 2015-06-30
  • Int'l Joint Research / Invited
• [Presentation] Adaptive sampling dual comb spectroscopy in terahertz region using unstabilized dual femtosecond lasers (2015)
  • Author(s): R. Ichikawa,Y.-D. Hsieh, K. Hayashi, K. Minoshima, H. Inaba, and T. Yasui
  • Organizer: CLEO: Science & Innovations 2015
  • Place of Presentation: San Jose Convention Center (San Jose, USA)
  • Year and Date: 2015-05-10
  • Int'l Joint Research
• [Presentation] Discrete Fourier transform infrared spectroscopy using precisely periodic pulse (2015)
  • Author(s): Y.-D. Hsieh, S. Okubo, H. Inaba, M. Hashimoto, and T. Yasui
  • Organizer: CLEO: Science & Innovations 2015
  • Place of Presentation: San Jose Convention Center (San Jose, USA)
  • Year and Date: 2015-05-10
  • Int'l Joint Research
• [Presentation] Real-time absolute frequency measurement of CW-THz wave based on a free-running THz comb (2015)
  • Author(s): T. Ogura, K. Hayashi, H. Inaba, K. Minoshima, and T. Yasui
  • Organizer: CLEO: Science & Innovations 2015
  • Place of Presentation: San Jose Convention Center (San Jose, USA)
  • Year and Date: 2015-05-10
  • Int'l Joint Research
• [Presentation] Low-pressure gas spectroscopy using terahertz frequency synthesizer traceable to microwave frequency standard via dual optical comb (2014)
  • Author(s): T. Yasui, H. Kimura, Y.-D. Hsieh, H. Inaba, and K. Minoshima
  • Organizer: 39th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz2014)
  • Place of Presentation: The University of Arizona (Tucson, USA)
  • Year and Date: 2014-09-14 – 2014-09-19
• [Presentation] Extraction of beat signal between dual THz combs using dual THz spectrum analyzers (2014)
  • Author(s): R. Ichikawa, H. Kimura, K. Hayashi, H. Inaba, K.Minoshima, and T. Yasui
  • Organizer: 39th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz2014)
  • Place of Presentation: The University of Arizona (Tucson, USA)
  • Year and Date: 2014-09-14 – 2014-09-19
• [Presentation] OSA Optical Sensors (2014)
  • Author(s): Gapless dual THz comb spectroscopy
  • Organizer: T. Yasui
  • Place of Presentation: Crowne Plaza Barcelona Fira Center (Barcelona, Spain)
  • Year and Date: 2014-07-27 – 2014-07-31
  • Invited
• [Presentation] Spectrally interleaved, comb-mode-resolved, dual-terahertz-comb spectroscopy (2014)
  • Author(s): Y.-D. Hsieh, Y. Iyonaga, Y. Sakaguchi, S. Yokoyama, H. Inaba, K. Minoshima, F. Hindle, T. Arak, and T . Yasui
  • Organizer: CLEO: Science & Innovations 2014
  • Place of Presentation: San Jose Convention Center (San Jose, USA)
  • Year and Date: 2014-06-08 – 2014-06-13
• [Presentation] Low-pressure gas spectroscopy using terahertz frequency synthesizer traceable to microwave frequency standard via dual optical combs (2014)
  • Author(s): Y.-D. Hsieh, H. Kimura, H. Inaba, K. Minoshima, T. Arak, and T. Yasui
  • Organizer: CLEO: Science & Innovations 2014
  • Place of Presentation: San Jose Convention Center (San Jose, USA)
  • Year and Date: 2014-06-08 – 2014-06-13
• [Remarks] 徳島大学 大学院社会産業理工学研究部 安井/南川研究室 ホームページ
  • URL: http://femto.me.tokushima-u.ac.jp
• [Remarks] 櫛の歯状のテラヘルツ波（テラヘルツコム）で 煙混在ガスの濃度をリアルタイムに分析（徳島大プレス発表）
  • URL: http://www.tokushima-u.ac.jp/docs/2016061300025/files/280615.pdf
• [Remarks] 櫛の歯状のテラヘルツ波（テラヘルツコム）で 煙混在ガスの濃度をリアルタイムに分析（JSTプレス発表）
  • URL: http://www.jst.go.jp/pr/announce/20160615-3/index.html
• [Remarks] テラヘルツ波の分光器（2016/6/20付け日経産業新聞掲載）
  • URL: http://femto.me.tokushima-u.ac.jp/topic/topic20160620.pdf
• [Remarks] 徳島大学大学院理工学研究部機械科学系 安井研究室
  • URL: http://femto.me.tokushima-u.ac.jp/
• [Remarks] 徳島大学大学院ソシオテクノサイエンス研究部 安井研究室
  • URL: http://femto.me.tokushima-u.ac.jp