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Proceedings Paper

The coupling measurement system for ring laser gyro
Author(s): Zhen-fang Fan; Hui Luo; Guang-feng Lu; Xiang Cheng
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Paper Abstract

The lock-in effect can reduce the performance of ring laser gyros. The lock-in effect is a result of backscattering. Self-consistent equations for ring laser gyro show that the intensity of the opposite beams has AC modulation at the frequency of beat frequency signal because of the backscattering. The amplitude and phase of the AC modulations have important information about the backscattering. Comparing to the DC component in intensity signal, The AC components are much smaller, it is not suitable to measure the AC components directly using analog to digital conversion. A novel synchronous demodulation method is proposed which taking advantage of the heterodyne read-out signals in quadrature. The coupling modulation under different rotation rate is measured, experiments of this system show that this system works well and we can draw beneficial conclusion from the experiments.

Paper Details

Date Published: 20 August 2011
PDF: 8 pages
Proc. SPIE 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging, 81922E (20 August 2011); doi: 10.1117/12.900593
Show Author Affiliations
Zhen-fang Fan, National Univ. of Defense Technology (China)
Hui Luo, National Univ. of Defense Technology (China)
Guang-feng Lu, National Univ. of Defense Technology (China)
Xiang Cheng, National Univ. of Defense Technology (China)


Published in SPIE Proceedings Vol. 8192:
International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging
Farzin Amzajerdian; Weibiao Chen; Chunqing Gao; Tianyu Xie, Editor(s)

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