Share Email Print
cover

Proceedings Paper

The effect of the mirror's phase shift on the magnetic bias in square ring resonators
Author(s): Zhenglong Kang; Jie Yuan; Meixiong Chen; Xingwu Long; Fei Wang; Jian Zhou; Xudong Yu
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Theoretical and experimental analysis have shown that magnetic field has unavoidable effect on the performances of ring laser gyroscopes. This kind of effect has been called the magnetic bias of ring laser gyroscopes in this article. The affection of the mirror's phase shift on the magnetic bias in square ring resonators has been analyzed in this article. The following parameters which have influence on the magnetic bias such as Ar, B, g and Rsp are taken into account, where Ar is the distortion angle, B is the magnetic field, g is the phase shift of the mirror and Rsp is the difference of the reflectivity for 's' and 'p' type polarizations of light. The affection of parameters gi (i=1, 2, 3, 4) on magnetic bias is analyzed in detail, where gi are the phase shifts of four mirrors respectively. When g1=g2=g3=g4 and gi is near zero, the magnetic bias will become very samll. When g1=g2=g3=g4 and gi is near π, the magnetic bias will become great. In practice, g1≠g2≠g3≠g4, but, when g1+g2+g3+g4=0, the magnetic bias will become small. Especially, when g1+g2+g3+g4=0 and g1+g2=0, the magnetic bias is very small and can be ignored. In addition, when gi is near π and g1+g2+g3+g4=4π, the magnetic bias is small. Especially, when gi is near π, g1+g2+g3+g4=4π and g1+g2 =2π, the magnetic bias is very small and can be ignored. Based on these novel results, the magnetic bias can be eliminated by controlling the phase shifts of four mirrors accurately in film coating process. The research on the magnetic bias of ring resonators is very important for improving the performance of ring laser gyroscopes. These findings are important to the research on high precision and super high precision ring laser gyroscopes.

Paper Details

Date Published: 8 May 2012
PDF: 6 pages
Proc. SPIE 8429, Optical Modelling and Design II, 84291T (8 May 2012); doi: 10.1117/12.922481
Show Author Affiliations
Zhenglong Kang, National Univ. of Defense Technology (China)
Jie Yuan, National Univ. of Defense Technology (China)
Meixiong Chen, National Univ. of Defense Technology (China)
Xingwu Long, National Univ. of Defense Technology (China)
Fei Wang, National Univ. of Defense Technology (China)
Jian Zhou, National Univ. of Defense Technology (China)
Xudong Yu, National Univ. of Defense Technology (China)


Published in SPIE Proceedings Vol. 8429:
Optical Modelling and Design II
Frank Wyrowski; John T. Sheridan; Jani Tervo; Youri Meuret, Editor(s)

© SPIE. Terms of Use
Back to Top