北京航空航天大学学报 ›› 2014, Vol. 40 ›› Issue (3): 304-308.doi: 10.13700/j.bh.1001-5965.2013.0258

• 论文 • 上一篇    下一篇

双干涉光纤陀螺光纤环温度致非互易性分析

徐宏杰, 安明花, 徐小斌, 滕飞   

  1. 北京航空航天大学 仪器科学与光电工程学院, 北京 100191
  • 收稿日期:2013-05-15 出版日期:2014-03-20 发布日期:2014-03-29
  • 基金资助:
    国家自然科学基金资助项目(61205077)

Thermal induced non-reciprocity of fiber coil in differential interference fiber optic gyroscope

Xu Hongjie, An Minghua, Xu Xiaobin, Teng Fei   

  1. School of Instrumentation Science and Opto-electronics Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
  • Received:2013-05-15 Online:2014-03-20 Published:2014-03-29

摘要: 双干涉光纤陀螺是一种新型光纤陀螺,可加倍Sagnac信号,具有轻小型、高信噪比的优点.为改善双干涉光纤陀螺光纤环的温度性能,针对其光路建立了光纤环温度致非互易误差模型,仿真分析了光纤环中90°熔点位置对温度致非互易误差的影响,提出了将90°熔点置于光纤环中点时陀螺的温度致非互易误差将显著减小,并进行了实验验证,实验结果与理论分析相符.结果表明将90°熔点置于光纤环中点可使双干涉光纤陀螺的温度致非互易误差降低为原来的1/400.

Abstract: Differential interference fiber optic gyroscope (DIFOG) is a new conception FOG. It can double the Sagnac signal and has the advantages of small size and high signal-to-noise ratio. In order to improve the temperature performance of DIFOG, the thermal-induced nonreciprocal error model of fiber coil was built based on its special light path. Then the effect of the position of 90° splicing point on thermal induced non-reciprocity error was analyzed and simulated. The results show the thermal induced non-reciprocity error is decreased significantly when the 90° splicing point at the midpoint of fiber coil. The corresponding thermal excitations experiments were also carried out. The experimental results are in agreement with theoretical calculation, and show that by modifying the 90° splicing point to the middle of fiber coil the thermal induced non-reciprocity error is reduced by a factor of~400.

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