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Proceedings Paper

High precision measurement for asymmetry of backscattering coupling coefficient in square passive ring cavity
Author(s): Wei Tian; Meixiong Chen; Jie Yuan; Guangmin Xu
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Paper Abstract

A device and procedure for measuring the asymmetry of backscattering coupling coefficients in square passive resonant cavity are described in this article. The asymmetry means that the two backscattering (BS) coupling coefficients r1 (in CW direction) and r2 (in CCW direction) are unequal, where CW and CCW correspond to clockwise and counter-clockwise directions respectively. It has been proved theoretically that a laser gyro will have a smaller lock-in threshold when the asymmetry of backscattering coupling coefficient is lower. The relative difference of BS coupling parameters for oppositely directed waves in ring cavity (RC) used in experiments is measured with high accuracy in measuring each BS coupling parameter. The system contributes to forecast the lock-in threshold of the laser gyro when assembling its square resonant cavity. Those research results are important for high precision laser gyro.

Paper Details

Date Published: 8 October 2015
PDF: 6 pages
Proc. SPIE 9677, AOPC 2015: Optical Test, Measurement, and Equipment, 96771S (8 October 2015); doi: 10.1117/12.2199838
Show Author Affiliations
Wei Tian, National Univ. of Defense Technology (China)
Meixiong Chen, National Univ. of Defense Technology (China)
Jie Yuan, National Univ. of Defense Technology (China)
Guangmin Xu, National Univ. of Defense Technology (China)


Published in SPIE Proceedings Vol. 9677:
AOPC 2015: Optical Test, Measurement, and Equipment
Sen Han; Jonathan D. Ellis; Junpeng Guo; Yongcai Guo, Editor(s)

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