• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

WHITE-LIGHT PHOTON RECYCLING LOOP INTERFEROMETER

Research Project

Project/Area Number 09650051
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied optics/Quantum optical engineering
Research InstitutionOSAKA UNIVERSITY

Principal Investigator

KITAGAWA Masahiro  GRADUATE SCHOOL OF ENGINEERING SCIENCE, OSAKA UNIVERSITY, ASSOCIATE PROFESSOR, 大学院・基礎工学研究科, 助教授 (20252629)

Co-Investigator(Kenkyū-buntansha) TAKAHARA Junichi  GRADUATE SCHOOL OF ENGINEERING SCIENCE, OSAKA UNIVERSITY, RESEARCH ASSOCIATE, 大学院・基礎工学研究科, 助手 (90273606)
KOBAYASHI Tetsuro  GRADUATE SCHOOL OF ENGINEERING SCIENCE, OSAKA UNIVERSITY, PROFESSOR, 大学院・基礎工学研究科, 教授 (10029522)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 1998: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1997: ¥1,700,000 (Direct Cost: ¥1,700,000)
Keywordsinterferometer / loop / gyroscope / fiber gyro / recycling / white-light / gravity wave / multimode / 位相差検出感度 / ショット雑音限界
Research Abstract

A. White-light photon recycling loop interferometer with Ti : Sapphire laser
・ One of the end mirrors of Ti : Sapphire laser is replaced with a loop interferometer with 3.6 m loop length. Dark fringe is clearly observed even under the threshold, which suggests the broadband nature of the loop interferometer. The multimode oscillation with 1 nm (FWHM) total spectral width and 45.5 MHz mode separation is observed above the threshold.
・ The phase sensitivity measured by intra-loop phase modulator is very close to the shot noise limit due to the leakage light. To achieve the true standard quantum limit governed by the intra-cavity photon number, the leakage photon must be eliminated by improving the alignment of the loop.
B. White-light photon recycling fiber gyro with EDFA
・ Erbium-doped fiber is terminated by a loop interferometer consisting of 500 m polarization maintaining fiber (PANDA) and pumped with 980 nm laser diode. The fundamental characteristics of the very long cavity laser is investigated.
・ The phase sensitivity measured by intra-loop phase modulator is improved by 26 times by white-light photon recycling.
・ The rotation sensitivity actually measured is limited by the intensity fluctuations of the laser and is far from the true quantum limit enabled by white-light photon recycling. To achieve the true quantum limit, the intensity noise of the laser must be suppressed.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] M.Kitagawa,T,Katou,et al: "Loop interferometer and new recycling scheme for gravitational wave detection"CLEO/Pacific Rim'97 Technical Digest. 257-257 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 北川勝浩、片岡広、小林哲朗: "ファイバループ干渉計による量子暗号通信"日本物理学会講演概要集 第2分冊. 52巻2号. 315-315 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.kitagawa: "Extraction of NMR Quantum Computation Signal with Parity Gate"Quantum Coherence and Decoherence (Proc.6th ISQM). (印刷中). (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 中原良、北川勝浩、小林哲朗: "レーザ内部光を利用したファイバジャイロ"第59回応用物理学会学術講演会予稿集. No.3. 891-891 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 北川勝浩: "NMR量子計算の現状と課題"日本物理学会講演概要集 第2分冊. 53巻2号. 339-339 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M. Kitagawa, T. Katou et. Al: "Loop interferometer and new recycling scheme for gravitational wave detection"CLEO/Pacific Rim '97 Tech. Digest. 257 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M. Kitagawa: "Extraction of NMR Quantum Computation Signal with Parity Gate"Proc. 6th ISOM. (in press). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 中原良,北川勝浩,小林哲郎: "レーザ内部光を利用したファイバジャイロ" 第59回応用物理学会学術講演会予稿集. NO.3. 891-891 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] M.Kitagawa, T.Katou, R.Nakahara, T.Kan, A.Morimoto, T.Kobayashi: "Loop interferometer and new recycling scheme for gravitational wave detection" CLEO/Pacific Rim'97 Technical Digest. 257-257 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 北川勝浩、片岡広、小林哲郎: "ファイバループ干渉計による量子暗号通信" 日本物理学会講演概要集第2分冊. 52巻2号. 315-315 (1997)

    • Related Report
      1997 Annual Research Report

URL: 

Published: 1997-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi