中国物理B ›› 2009, Vol. 18 ›› Issue (7): 2801-2805.doi: 10.1088/1674-1056/18/7/030

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A dual-loop Sagnac interferometer

赵建领1, 吴令安1, 马海强2   

  1. (1)Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; (2)School of Sciences, Beijing University of Posts and Telecommunications, Beijing 100876, China;Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2009-02-23 修回日期:2009-03-17 出版日期:2009-07-20 发布日期:2009-07-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 60578029, 10674174 and 10805006) and the National Program for Basic Research in China (Grant No 2006CB921100).

A dual-loop Sagnac interferometer

Ma Hai-Qiang(马海强)a)b), Zhao Jian-Ling(赵建领)b), and Wu Ling-An(吴令安)b)†   

  1. a School of Sciences, Beijing University of Posts and Telecommunications, Beijing 100876, China; b Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2009-02-23 Revised:2009-03-17 Online:2009-07-20 Published:2009-07-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 60578029, 10674174 and 10805006) and the National Program for Basic Research in China (Grant No 2006CB921100).

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摘要： A new type of all-fibre Sagnac interferometer composed of two loops is proposed and analysed in detail. It can be used with a very long transmission line while maintaining excellent performance characteristics due to the automatic compensation of any birefringence effects in the trunk fibre. Preliminary experiments at 1310~nm wavelength with a 70~km long trunk fibre demonstrated an interference visibility as high as 98%, indicating that this scheme has promising potential applications.

Abstract: A new type of all-fibre Sagnac interferometer composed of two loops is proposed and analysed in detail. It can be used with a very long transmission line while maintaining excellent performance characteristics due to the automatic compensation of any birefringence effects in the trunk fibre. Preliminary experiments at 1310 nm wavelength with a 70 km long trunk fibre demonstrated an interference visibility as high as 98%, indicating that this scheme has promising potential applications.

Key words: Sagnac interferometer, polarization controller

中图分类号:  (Interferometers)

  • 07.60.Ly
07.60.Vg (Fiber-optic instruments) 42.81.Gs (Birefringence, polarization)