Optimum incident angle to Faraday wedge of multi-oscillator ring laser gyroscope

SUO Gaojie; QIU Fusheng; SONG Kai

doi:10.7510/jgjs.issn.1001-3806.2016.02.020

In order to explore effect of incident light polarization on optimum incident angle to Faraday wedge of multi-oscillator ring laser gyroscope, the Jones matrix for Faraday wedge was established. The circularly polarization and the elliptically polarization were numerically simulated by using MATLAB. The optimum incident angle was obtained by searching for the minimum amplitude of magnetic circular dichroic loss at different incident angles and different temperatures in the range of -40℃~80℃. The results show the optimum incident angles to Faraday wedge for circularly polarization and elliptically polarization are different. This difference is enough to affect measurement accuracy of multi-oscillator ring laser gyroscope. The impact of incident polarization on the optimum incident angle should be taken into consideration when placing Faraday wedge. Phase shifts of p(perpendicular to incident plane) and s (parallel with incident plane) polarizations, reflecting coefficients of four reflecting mirrors of multi-oscillator ring laser gyroscope have the influence on the optimum incident angle.

Optimum incident angle to Faraday wedge of multi-oscillator ring laser gyroscope

Corresponding author: QIU Fusheng, fsqiu@mail.xjtu.edu.cn;

1. School of Science, Xi'an Jiaotong University, Xi'an 710049, China

Received Date: 2015-01-19

Accepted Date: 2015-01-31

Available Online: 2016-03-25

Abstract: In order to explore effect of incident light polarization on optimum incident angle to Faraday wedge of multi-oscillator ring laser gyroscope, the Jones matrix for Faraday wedge was established. The circularly polarization and the elliptically polarization were numerically simulated by using MATLAB. The optimum incident angle was obtained by searching for the minimum amplitude of magnetic circular dichroic loss at different incident angles and different temperatures in the range of -40℃~80℃. The results show the optimum incident angles to Faraday wedge for circularly polarization and elliptically polarization are different. This difference is enough to affect measurement accuracy of multi-oscillator ring laser gyroscope. The impact of incident polarization on the optimum incident angle should be taken into consideration when placing Faraday wedge. Phase shifts of p(perpendicular to incident plane) and s (parallel with incident plane) polarizations, reflecting coefficients of four reflecting mirrors of multi-oscillator ring laser gyroscope have the influence on the optimum incident angle.

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Reference (16)

[1]	WANG Z G,LONG X W,WANG F. Overview of four-mode differential laser gyros[J]. Laser Optoelectronics Progress, 2012,49(4):040005(in Chinese).
[2]	WANG Z G,LONG X W,WANG F. Influence of differential loss on zero drift in four-frequency differential laser gyros[J]. Laser Technology,2010,34(6):823-827(in Chinese).
[3]	JIANG Y J. Study on the basic characteristics of the faraday bias in differential laser gyro[D].Xi'an:Northwestern Polytechnical University, 2006:16-30(in Chinese).
[4]	HUANG H,BO S L. Research on faraday effect in magneto-optic glass[J].Applied Optics, 2004,25(4):14-17.
[5]	ZHOU L,REN L,LIU Q Q, et al. The compensation method for thermal bias of ring laser gyro[J]. Chinese Journal of Sensors and Actuators,2013,26(3):353-356(in Chinese).
[6]	MARTIN G J. Multioscillator ring laser gyro using compensated optical wedge:US,5907402[P]. 1999-05-25.
[7]	REN S F. Polarization states of linearly polarized light transmitting through several wave-plates with arbitrary thickness[J].Laser Technology, 2014,38(3):394-397(in Chinese).
[8]	XIONG X M,WANG M,QIN Z J.A method of temperature compensation for all optical fiber current sensors[J].Laser Technology, 2014,38(6):759-763.
[9]	FENG T, JIAO Z Y, ZHOU Q, et al. Analysis of optical axis variations in monolithic nonplanar ring laser[J].Chinese Optical Letters, 2014,12(1):011402.
[10]	WANG Z G.Bias characteristics of four-mode differential laser gyroscope with nonplanar cavity and its electronic system design[D]. Changsha:National University of Defense Technology, 2010:19-22(in Chinese).
[11]	CHOW W, GEA-BANACLOCHE J, PEDROTTI L, et al. The ring laser gyro[J].Reviews of Modern Physics, 1989,57(1):61-104.
[12]	MARTIN G J. Non-planar gyros and magnetic biases[J].Proceedings of the SPIE, 1984,487:94-101.
[13]	YU D Y,TAN H Y. Engineering optics[M].Beijing:China Machine Press,2005:306-313(in Chinese).
[14]	PAN H J, LIU Y. Matrix method to express the reflecting process of beam[J].Applied Optics, 2004, 25(4):9-13.
[15]	AI Y B, JIN Y J. Faraday magneto-optical rotation effect and its application[J]. Physics and Engineering,2002,12(5):50-51.
[16]	ZHAO J L. Advanced optics[M].Beijing:National Defence Industry Press,2002:36-42(in Chinese).

Optimum incident angle to Faraday wedge of multi-oscillator ring laser gyroscope

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