Real-time spectroscopic measurement system for the terahertz wave visualized by optical heterodyne

• Project/Area Number: 18H01908
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 30020:Optical engineering and photon science-related
• Research Institution: National Institute of Information and Communications Technology
• Principal Investigator: Shin'ichiro Hayashi 国立研究開発法人情報通信研究機構, テラヘルツ研究センターテラヘルツ連携研究室, 主任研究員 (70360188)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Project Status: Completed (Fiscal Year 2020)
• Budget Amount: ¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000); Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2019: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000); Fiscal Year 2018: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
• Keywords: テラヘルツ光 / 非線形光学 / 波長変換 / テラヘルツ帯スペクトル計測

Outline of Final Research Achievements

We propose and demonstrate a real-time spectroscopic measurement spectroscopic measurement system for the terahertz wave visualized by optical heterodyne using wavelength conversion between infrared and terahertz-waves based on nonlinear optics. As a stabilized pumping beam, we enhanced the brightness of 1.5 μm beam generated by Nd:YAG MOPA system based molecular gas stabilized injection-seeded PPLN-OPG and KTA-OPA for terahertz-wave parametric wavelength conversion. Wavelength conversion techniques with frequency stabilized infrared beams allow the spectra in the terahertz region to be determine their frequency as traceable to the national standard. The results reported at papers, and domestic and international conferences.

Academic Significance and Societal Importance of the Research Achievements

テラヘルツ光無線通信が不得意とする長距離伝送を，光通信波長帯に波長変換することにより光ファイバーネットワークを通じて実現するための基盤技術となり得る成果であり，変換後は不可視領域であるテラヘルツ帯を可視化することも容易である。加えて，既に発展した光制御技術に基づいたテラヘルツ光周波数制御手法に関する提案を行った。これらの成果は，テラヘルツ光を利用した広範囲にわたる領域，分子物理学など基礎科学の発展においても，無線通信・非破壊検査など工業利用においても重要な結果であると考えている。

Research Products

• [Journal Article] Terahertz parametric generation with pulse train pump beam (2020)
  • Author(s): Kawaguchi Rie、Hayashi Shin’ichiro、Kawase Kodo、Murate Kosuke
  • Journal Title: OSA Technical Digest of the Frontiers in Optics / Laser Science Volume: なし Pages: FW7F.6-FW7F.6
  • DOI: 10.1364/fio.2020.fw7f.6
  • Peer Reviewed
• [Journal Article] Zero-spindle spectral drill: real-time spectral measurement in a fixed Fabry-Perot cavityavity (2020)
  • Author(s): Seigo Ohno, Katsuhiko Miyamoto, Shin'ichiro Hayashi, Norihiko Sekine
  • Journal Title: Optics Express Volume: 28 Issue: 15 Pages: 22088-22094
  • DOI: 10.1364/oe.397238
  • Peer Reviewed / Open Access
• [Journal Article] Continuously Tunable NIR Pulsed Parametric Sources by an Is-OPG / OPA for Terahertz-wave Generation (2020)
  • Author(s): Hayashi Shin’ichiro、Urata Yoshiharu、Ohno Seigo、Miyamoto Katsuhiko、Sekine Norihiko
  • Journal Title: OSA Technical Digest of the 14th Pacific Rim Conference on Lasers and Electro-Optics (CLEO PR 2020) Volume: なし Pages: 3-6
  • DOI: 10.1364/cleopr.2020.p3_6
  • Peer Reviewed
• [Journal Article] Continuously Tunable Terahertz-wave Parametric Source based on Spectral Drill Cavity (2020)
  • Author(s): Hayashi Shin'ichiro、Urata Yoshiharu、Ohno Seigo、Miyamoto Katsuhiko、Sekine Norihiko
  • Journal Title: 2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) Volume: なし Pages: 1-2
  • DOI: 10.1109/irmmw-thz46771.2020.9370657
  • Peer Reviewed
• [Journal Article] Spectroscopic Measurement of Terahertz-wave based on Nonlinear Optics (2020)
  • Author(s): Shin’ichiro Hayashi, Seigo Ohno, Katsuhiko Miyamoto, Yoshiharu Urata, and Norihiko Sekine
  • Journal Title: URSI GASS 2020 Volume: なし
  • Peer Reviewed
• [Journal Article] Real-time terahertz wave spectrometer using pulse train (2020)
  • Author(s): Kawaguchi Rie、Kawase Kodo、Hayashi Shinichiro、Murate Kosuke
  • Journal Title: 2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) Volume: なし Pages: 1-1
  • DOI: 10.1109/irmmw-thz46771.2020.9370532
  • Peer Reviewed
• [Journal Article] Optical Heterodyne Detection in the Terahertz Region for Accurate Frequency Measurement (2019)
  • Author(s): Hayashi Shin'ichiro、Saito Shingo、Sekine Norihiko
  • Journal Title: 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) Volume: なし Pages: 1-2
  • DOI: 10.1109/irmmw-thz.2019.8874117
  • Peer Reviewed
• [Journal Article] Wavelength Conversion between Terahertz wave and Infrared for frequency measurement (2019)
  • Author(s): Shin’ichiro HAYASHI, Seigo OHNO, and Norihiko SEKINE
  • Journal Title: 3rd PEM International Workshop in Ise (PEM2019) Volume: なし
  • Peer Reviewed
• [Journal Article] Terahertz wave Heterodyne Detection based on Parametric Up-conversion at Room Temperature (2018)
  • Author(s): Hayashi Shin'ichiro、Uzawa Yoshinori
  • Journal Title: 2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) Volume: 1 Pages: 1-2
  • DOI: 10.1109/irmmw-thz.2018.8510422
  • Peer Reviewed
• [Journal Article] Real-time Detection of Terahertz wave from Quantum Cascade Laser by Frequency Up-conversion in a Nonlinear Crystal (2018)
  • Author(s): Saito Shingo、Hayashi Shin'ichiro、Uzawa Yoshinori、Sekine Norihiko、Nawata Kouji、Minamide Hiroaki
  • Journal Title: 2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) Volume: 1 Pages: 1-2
  • DOI: 10.1109/irmmw-thz.2018.8510343
  • Peer Reviewed
• [Presentation] 波長変換によるテラヘルツ光計測 (2021)
  • Author(s): 林伸一郎
  • Organizer: 理研仙台セミナー
  • Invited
• [Presentation] Bi-directional terahertz wave parametric wavelength conversion (invited) (2021)
  • Author(s): Shin'ichiro Hayashi and Norihiko Sekine
  • Organizer: GSELOP2021
  • Invited
• [Presentation] 機械動作を排したスペクトルドリル (2020)
  • Author(s): 大野誠吾, 宮本克彦, 林伸一郎, 関根徳彦
  • Organizer: レーザー学会学術講演会第40 回年次大会
• [Presentation] High speed measurement in spectral drill using q-plate and camera (2020)
  • Author(s): 143.Seigo Ohno, Katsuhiko Miyamoto, Shin’ichiro Hayashi and Norihiko Sekine
  • Organizer: the 8th International Conference on Photonics, Optics and Laser Technology (PHOTOPTICS 2020)
  • Invited
• [Presentation] Optical heterodyne detection based on parametric upconversion in the terahertz region at room temperature (2019)
  • Author(s): Shin’ichiro Hayashi, Shingo Saito, and Norihiko Sekine
  • Organizer: Photonics West
  • Int'l Joint Research
• [Presentation] Bidirectional Wavelength Conversion between Infrared and Terahertz Wave in Nonlinear Crystal (invited) (2019)
  • Author(s): S. Hayashi, S. Saito, N. Sekine
  • Organizer: 2nd International Congress on Photonics Research (Interphotonics2019)
  • Int'l Joint Research / Invited
• [Presentation] Optical Heterodyne Detection in the Terahertz Region for Accurate Frequency Measurement (2019)
  • Author(s): Shin’ichiro Hayashi, Shingo Saito, and Norihiko Sekine
  • Organizer: IRMMW-THz2019
  • Int'l Joint Research
• [Presentation] Optical heterodyne detection of quasi-CW terahertz-wave from THz-QCL (2019)
  • Author(s): Shin’ichiro Hayashi and Norihiko Sekine
  • Organizer: 2019 Infrared Terahertz Quantum Workshop (ITQW 2019)
  • Int'l Joint Research
• [Presentation] Wavelength Conversion between Terahertz wave and Infrared for frequency measurement (2019)
  • Author(s): Shin’ichiro HAYASHI, Seigo OHNO, and Norihiko SEKINE
  • Organizer: 3rd PEM International Workshop in Ise (PEM2019)
• [Presentation] Optical heterodyne detection based on parametric upconversion in the terahertz region at room temperature (2019)
  • Author(s): Shin’ichiro Hayashi, Shingo Saito, Norihiko Sekine
  • Organizer: Photonics West 2019
  • Int'l Joint Research
• [Presentation] Bidirectional and efficient conversion between terahertz-wave and infrared in MgO:LiNbO3 (invited) (2018)
  • Author(s): Shin’ichiro Hayashi, Yoshinori Uzawa, and Norihiko Sekine
  • Organizer: EMN Summer 2018 (Photonics/Optoelectronics)
  • Int'l Joint Research / Invited
• [Presentation] Terahertz Wave Heterodyne Detection Based On Parametric Up-conversion At Room Temperature (2018)
  • Author(s): Shin'ichiro Hayashi and Yoshinori Uzawa
  • Organizer: IRMMW-THz 2018
  • Int'l Joint Research
• [Presentation] Real-time Detection Of Terahertz Wave From Quantum Cascade Laser By Frequency Upconversion In A Nonlinear Crystal (2018)
  • Author(s): Shingo Saito, Kouji Nawata, Shin'ichiro Hayashi, and Yoshinori Uzawa
  • Organizer: IRMMW-THz 2018
  • Int'l Joint Research
• [Presentation] 光ヘテロダイン検出によるテラヘルツ帯スペクトラム計測 (2018)
  • Author(s): 林 伸一郎，齋藤 伸吾，関根 徳彦
  • Organizer: 電子回路研究会・周波数計測による多方面精密計測
• [Book] Optical heterodyne terahertz wave measurement (2021)
  • Author(s): Shin'ichiro Hayashi and Norihiko Sekine
  • Publisher: Intech Open