High-accuracy length metrology with self-correction of environmental fluctuation using optical frequency combs.

• Project/Area Number: 25286076
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Optical engineering, Photon science
• Research Institution: The University of Electro-Communications
• Principal Investigator: MINOSHIMA Kaoru 電気通信大学, 情報理工学(系)研究科, 教授 (20358112)
• Co-Investigator(Kenkyū-buntansha): YASUI Takeshi 徳島大学, ソシオテクノサイエンス研究部, 教授 (70314408) ; INABA Hajime 国立研究開発法人産業技術総合研究所, 物理計測標準研究部門, 研究グループ長 (70356492)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥18,980,000 (Direct Cost: ¥14,600,000、Indirect Cost: ¥4,380,000); Fiscal Year 2015: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000); Fiscal Year 2014: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000); Fiscal Year 2013: ¥10,400,000 (Direct Cost: ¥8,000,000、Indirect Cost: ¥2,400,000)
• Keywords: 光コム / 距離計測 / 干渉計測 / 空気屈折率 / 超短パルスレーザー / ファイバレーザー / 精密計測 / 省エネ / 干渉計

Outline of Final Research Achievements

Air refractive index correction is one of the major sources of uncertainty in length metrology. In this study, high-accuracy length measurement method by use of optical frequency combs was developed and significant improvement in the accuracy of air refractive index correction was achieved. High-precision interferometric measurement method of dispersion relation of air refractive index was developed by using precise frequency control of multi-color combs. Basic technologies for high-accuracy and real-time self-correction by direct use of target optical measurement results has been developed. Ultrahigh-accuracy correction was actually demonstrated by developing the self-evaluation method without relying on the accuracy of air refractive index equation. This study opens up the high-accuracy energy-saving length measurement methods under practical environmental conditions. Developed technique can improve the accuracy of well-established empirical equations for air refractive index.

Research Products

• [Int'l Joint Research] 清華大学(中国)
• [Int'l Joint Research] コロラド大学(米国)
• [Journal Article] Highly stabilized optical frequency comb interferometer with a long fiber-based reference path towards arbitrary distance measurement (2015)
  • Author(s): Y. Nakajima and K. Minoshima
  • Journal Title: Optics Express Volume: 23 Issue: 20 Pages: 25979-25987
  • DOI: 10.1364/oe.23.025979
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Fiber-based optical frequency comb interferometer with nm-stability and meters-wide scanning range (2015)
  • Author(s): Y. Nakajima and K. Minoshima
  • Journal Title: CLEO 2015 Volume: SI
  • Acknowledgement Compliant
• [Journal Article] Ultra-precision optical metrology using highly controlled fiber-based frequency combs (2015)
  • Author(s): K. Minoshima, G. Wu, Y. Nakajima
  • Journal Title: Proceedings of SPIE Volume: 9525 Pages: 9525-1
  • Int'l Joint Research / 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. Hayashi, R. Ichikawa, H. Cahyadi, Y.-D. Hsieh, Y. Mizutani, H. Yamamoto, T. Iwata, H. Inaba, and K. Minoshima
  • Journal Title: Opt. Express Volume: 23 Issue: 9 Pages: 11367-11377
  • DOI: 10.1364/oe.23.011367
  • Peer Reviewed / Open Access
• [Journal Article] Pulse-to-pulse alignment technique based on synthetic-wavelength interferometry of optical frequency combs for distance measurement (2013)
  • Author(s): G. Wu, M. Takahashi, H. Inaba, K. Minoshima
  • Journal Title: Optics Letters Volume: 38 Issue: 12 Pages: 2140-2143
  • DOI: 10.1364/ol.38.002140
  • Peer Reviewed
• [Journal Article] Extremely high-accuracy correction of air refractive index using two-colour optical frequency combs (2013)
  • Author(s): G. Wu, M. Takahashi, K. Arai, H. Inaba, K. Minoshima
  • Journal Title: Scientific Report Volume: 3 Issue: 1 Pages: 18941-5
  • DOI: 10.1038/srep01894
  • Peer Reviewed
• [Presentation] 高精度に位相制御された超高速ファイバレーザーによる光コムとその応用 (2015)
  • Author(s): 美濃島薫
  • Organizer: 超高速光エレクトロニクス研究会
  • Place of Presentation: 東京
  • Year and Date: 2015-11-25
  • Invited
• [Presentation] テラヘルツ計測の基礎と各種応用 (2015)
  • Author(s): 安井 武史
  • Organizer: 情報機構セミナー
  • Place of Presentation: 大田区
  • Year and Date: 2015-09-29
  • Invited
• [Presentation] 光波の超精密制御が拓く応用の世界 (2015)
  • Author(s): 美濃島薫
  • Organizer: 応用物理学会第76回秋季学術講演会
  • Place of Presentation: 名古屋
  • Year and Date: 2015-09-14
  • Invited
• [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
  • Year and Date: 2015-09-13
  • Invited
• [Presentation] Length metrology with ultra-high precision using fiber-based frequency combs (2015)
  • Author(s): Kaoru Minoshima
  • Organizer: CLEO-PR
  • Place of Presentation: Busan, Korea
  • Year and Date: 2015-08-25
  • Int'l Joint Research / Invited
• [Presentation] Ultra-precision optical metrology using fiber-based frequency combs (2015)
  • Author(s): Kaoru Minoshima
  • Organizer: ISUPT/EXAT
  • Place of Presentation: Kyoto
  • Year and Date: 2015-07-13
  • Int'l Joint Research / Invited
• [Presentation] Ultra-precision optical metrology using highly controlled fiber-based frequency combs (2015)
  • Author(s): Kaoru Minoshima
  • Organizer: Optical Measurement Systems for Industrial Inspection IX
  • Place of Presentation: Munich, Germany
  • Year and Date: 2015-06-22
  • Int'l Joint Research / Invited
• [Presentation] Development of fiber-based frequency combs and their application in precision metrology (2015)
  • Author(s): Kaoru Minoshima
  • Organizer: China-Korea-Japan Joint Workshop for Ultrafast Photonics Technology
  • Place of Presentation: 北京
  • Year and Date: 2015-03-22
  • Invited
• [Presentation] ファイバー光コム共振器の外乱/RF周波数変換機能を用いたひずみ計測に関する基礎研究 (2015)
  • Author(s): 小倉 隆志, 中嶋 善晶, 山岡 禎久, 美濃島 薫,安井 武史
  • Organizer: 第62回応用物理学会春季学術講演会
  • Place of Presentation: 東京都文京区
  • Year and Date: 2015-03-11 – 2015-03-14
• [Presentation] ファイバ型光コム干渉計による光路長走査範囲の拡大 (2015)
  • Author(s): 中嶋善晶、美濃島薫
  • Organizer: 応用物理学会
  • Place of Presentation: 東海大学
  • Year and Date: 2015-03-11
• [Presentation] 高速制御ファイバコムと応用技術 (2015)
  • Author(s): 中嶋善明、美濃島薫、稲場肇
  • Organizer: 第15回電位学会光・量子デバイス研究会
  • Place of Presentation: 東京
  • Year and Date: 2015-03-05
  • Invited
• [Presentation] 光コムの超精密ものさしと応用展開 (2015)
  • Author(s): 美濃島薫
  • Organizer: 第6回超高速光エレクトロニクス研究会
  • Place of Presentation: 東京大学柏キャンパス
  • Year and Date: 2015-01-16
  • Invited
• [Presentation] 周波数安定化手法を適用した光コム干渉計の開発 (2015)
  • Author(s): 中嶋善晶、美濃島薫
  • Organizer: レーザー学会
  • Place of Presentation: 筑波大学文京キャンパス
  • Year and Date: 2015-01-11
• [Presentation] 超高精度の光のものさし：光コム (2014)
  • Author(s): 美濃島薫
  • Organizer: 第4回先端フォトニクスシンポジウム
  • Place of Presentation: 日本学術会議
  • Year and Date: 2014-08-08
  • Invited
• [Presentation] 狭線幅光コムの開発と光シンセサイザの研究 (2014)
  • Author(s): 中嶋善明、美濃島薫
  • Organizer: 第4回先端フォトニクスシンポジウム
  • Place of Presentation: 日本学術会議
  • Year and Date: 2014-08-08
• [Presentation] Ultrahigh-accuracy optical metrology using fiber-based frequency combs (2014)
  • Author(s): Kaoru Minoshima
  • Organizer: International Workshop, Ultrafast Lasers and Applications
  • Place of Presentation: Taiwan
  • Year and Date: 2014-08-05
  • Invited
• [Presentation] 光コムの作る超精密ひかりのものさし (2014)
  • Author(s): 美濃島薫
  • Organizer: 応用光学懇談会第148回講演会
  • Place of Presentation: 大阪
  • Year and Date: 2014-07-02
  • Invited
• [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:2014
  • Place of Presentation: San Jose
  • Year and Date: 2014-06-12
• [Presentation] ファイバレーザー光周波数コムと計測応用
  • Author(s): 美濃島 薫
  • Organizer: レーザー学会第5回ファイバレーザー技術専門委員会
  • Place of Presentation: 調布市
  • Invited
• [Presentation] 光周波数コムを用いた精密計測
  • Author(s): 美濃島 薫
  • Organizer: 電気学会先端光・量子発生利用技術調査専門委員会
  • Place of Presentation: 調布市
  • Invited
• [Presentation] 光周波数コムを用いた高精度光計測
  • Author(s): 美濃島 薫
  • Organizer: 電子情報通信学会総会
  • Place of Presentation: 新潟市
  • Invited
• [Presentation] 光の周波数と位相を自由に制御できる光シンセサイザー：光コム -概要と計測への応用-
  • Author(s): 稲場 肇
  • Organizer: 中部レーザ応用技術研究会 第89回研究会
  • Place of Presentation: 名古屋市
  • Invited