Frequency counter based on teraheltz standard frequency comb

2010 Fiscal Year Final Research Report

• Project/Area Number: 20560036
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Applied optics/Quantum optical engineering
• Research Institution: Osaka University
• Principal Investigator: YOKOYAMA Shuko Osaka University, 大学院・基礎工学研究科, 特任研究員 (30437363)
• Co-Investigator(Kenkyū-buntansha): YASUI Takeshi 徳島大学, 大学院・ソシオテクノサイエンス研究部, 教授 (70314408) ; ARAKI Tsutomu 大阪大学, 大学院・基礎工学研究科, 教授 (50136214)
• Project Period (FY): 2008 – 2010
• Keywords: 光計測 / テラヘルツ / 光周波数コム / 周波数標準 / ファイバーレーザー

Research Abstract

We have developed a high-accuracy and high-resolution teraheltz(THz) electromagnetic wave frequency counter based on THz standard frequency comb, which consists of many accurate frequency lines extending from microwave region to THz region, utilizing our previously developed "multifrequency heterodyning photoconductive detection". The system adopted a fiber laser as a light source to be small-size, stable and robust instrument for a practical use. Measurement precision of 2.4*10^<-1>, bandwidth of 1THz and minimum power limitation of a few hundreds of nanowatt have been achieved.

Research Products

• [Journal Article] Terahertz frequency metrology based on frequency comb (2011)
  • Author(s): T.Yasui, S. Yokoyama, H. Inaba, K.Minoshima, T.Nagatsuma, T.Araki
  • Journal Title: IEEE Journal of Selected Topics in Quantum Electronics 17 Pages: 191-201
  • Peer Reviewed
• [Journal Article] Absolute distance measurement of optically rough objects using asynchronous-optical-sampling terahertz impulse ranging Applied Optics 49 5262-5270 2010 有T.Yasui, M.Nose, A.Ihara, K.Kawamoto, S.Yokoyama, H.Inaba, K.Minoshima, T.Araki Fiber-based, hybrid terahertz spectrometer using dual fiber combs Optics Letters 35 1689-1691 2010 有T.Yasui, H.Takahashi, Y.Iwamoto, H.Inaba, K.Minoshima Continuously tunable, phase-locked, continuous-wave terahertz generator based on photomixing of two continuous-wave lasers locked to two independent optical combs Journal of Applied Physics 107 033111 2010 有T.Yasui, R.Nakamura, K.Kawamoto, A.Ihara, Y.Fujimoto, S.Yokoyama, H.Inaba, K.Minoshima, T.Nagatsuma, T.Araki Real-time monitoring of continuous-wave terahertz radiation using a fiber-based, terahertz-comb-referenced spectrum analyzer (2009)
  • Author(s): T.Yasui, Y.Kabetani, Y.Ohgi, S.Yokoyama, T.Araki
  • Journal Title: Optics Express 17 Pages: 17034-17043
  • Peer Reviewed
• [Journal Article] A distance meter using a terahertz intermode beat in an optical frequency comb (2009)
  • Author(s): S.Yokoyama, T.Yokoyama, Y.Hagihara, T.Araki, T.Yasui
  • Journal Title: Optics Express 17 Pages: 17324-17337
  • Peer Reviewed
• [Presentation] Observation of Terahertz Frequency Comb by Fiber-Based, Asynchronous-Optical-Sampling THz-TDS (2010)
  • Author(s): T.Yasui, M.Nose, K.Kawamoto, S.Yokoyama, H.Inaba (AIST), K.Minoshima(AIST), T.Araki
  • Organizer: CLEO/QELS and PhAST
  • Place of Presentation: San Jose, USA
  • Year and Date: 20100516-20100521
• [Presentation] Absolute Distance Measurement with Asynchronous-Optical-Sampling Terahertz Impulse Radar (2010)
  • Author(s): T.Yasui, Y.Ohgi, Y.Kabetani, S.Yokoyama, T.Araki
  • Organizer: CLEO/QELS and PhAST
  • Place of Presentation: San Jose, USA
  • Year and Date: 20100516-20100521
• [Presentation] Phase measurement of tunable CW-THz radiation at multiple frequencies based on photoconductive mixing with terahertz frequency comb (2009)
  • Author(s): M.Fujio, R.Nakamura, S.Yokoyama, T.Yasui, T.Araki
  • Organizer: 34th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz2009)
  • Place of Presentation: Busan, Korea
  • Year and Date: 20090921-20090925
• [Presentation] Asynchronous optical sampling, terahertz impulse radar (2009)
  • Author(s): Y.Ohgi, Y.Kabetani, T.Yasui, S.Yokoyama, T.Araki
  • Organizer: 8th Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim 2009)
  • Place of Presentation: Shanghai, China
  • Year and Date: 20090830-20090903
• [Presentation] Terahertz spectrum analyzer for precise frequency measurement of CW THz source (2009)
  • Author(s): T.Yasui, R.Nakamura, A.Ihara, S.Yokoyama, H.Inaba, K.Minoshima, T.Araki
  • Organizer: International Workshop on Terahertz Science and Technology (OTST2009)
  • Place of Presentation: Santa Barbara, USA
  • Year and Date: 20090307-20090311
• [Remarks] ホームページ等
  • URL: http://sml.me.es.osaka-u.ac.jp/araki_lab/
• [Patent(Industrial Property Rights)] 超高分解テラヘルツ分光計測装置 (2010)
  • Inventor(s): 安井武史, 荒木勉, 横山修子, 野瀬昌城, 北岸恵子
  • Industrial Property Rights Holder: 大阪大学,大塚電子
  • Industrial Property Number: 特許,特願2010-112723
  • Filing Date: 2010-05-16