Abstract

Lock-in phenomenon in ring laser gyroscopes is directly related to effective backscattering, which includes both backscattering and nonuniform loss. Effective backscattering often differs in different states and can only be reflected in a working state via online estimation in the working state. Moreover, effective backscattering can result in the intensity modulation of beams in the opposite directions. The effective backscattering parameters can be obtained by measuring the weak modulations in the intensity signals under different rotation rates and by using the curve-fitting method. This letter demonstrates the online estimation of backscattering.

© 2012 Chinese Optics Letters

Effect of Rayleigh backscattering in an optical passive ring-resonator gyro

K. Iwatsuki, K. Hotate, and M. Higashiguchi
Appl. Opt. 23(21) 3916-3924 (1984)

Backscattering in an optical passive ring-resonator gyro: experiment

Katsumi Iwatsuki, Kazuo Hotate, and Minoru Higashiguchi
Appl. Opt. 25(23) 4448-4451 (1986)

Mirrors movement-induced equivalent rotation effect in ring laser gyros

Guangfeng Lu, Zhenfang Fan, Shaomin Hu, and Hui Luo
Opt. Express 21(12) 14458-14465 (2013)

Reducing the effects of backscattering on the behavior of a ring laser

W. R. Christian, E. C. Gage, and L. Mandel
Opt. Lett. 12(5) 328-330 (1987)

Compensation of the laser parameter fluctuations in large ring-laser gyros: a Kalman filter approach

Alessandro Beghi, Jacopo Belfi, Nicolò Beverini, B. Bouhadef, D. Cuccato, Angela Di Virgilio, and Antonello Ortolan
Appl. Opt. 51(31) 7518-7528 (2012)