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Volume 40 Issue 3
Mar.  2014
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Journal of Beijing University of Aeronautics and Astronautics  > 2014  >  40(3): 304-308.
Xu Hongjie, An Minghua, Xu Xiaobin, et al. Thermal induced non-reciprocity of fiber coil in differential interference fiber optic gyroscope[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(3): 304-308. doi: 10.13700/j.bh.1001-5965.2013.0258(in Chinese)
Citation: Xu Hongjie, An Minghua, Xu Xiaobin, et al. Thermal induced non-reciprocity of fiber coil in differential interference fiber optic gyroscope[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(3): 304-308. doi: 10.13700/j.bh.1001-5965.2013.0258(in Chinese)
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Thermal induced non-reciprocity of fiber coil in differential interference fiber optic gyroscope

doi: 10.13700/j.bh.1001-5965.2013.0258

  • School of Instrumentation Science and Opto-electronics Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • Received Date: 15 May 2013
  • Publish Date: 20 Mar 2014
    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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