title: Effects of back reflection on the fiber ring laser gyroscope.
abstract: In this Letter, the effects of the backreflection coefficient on a fiber ring laser gyroscope (FRLG) are discussed in detail. By applying the mode coupling equations, the eigenmodes in the FRLG are theoretically analyzed. We have found that the degree of intensity oscillation is intimately related to the backreflection coefficient in the FRLG; we have also explored the theoretical responding curve of FRLG. By utilizing a bidirectional filter with a tunable backreflection coefficient, our conclusions are proven. Two responding curves were obtained under two different backreflection coefficients, the scale factors of which are 1.4405  kHz/deg·s(-1) and 1.3096  kHz/deg·s(-1), respectively. The lock-in ranges of the curves are within 10  deg/s and 15  deg/s.
authors.affiliation: School of Optoelectronics, Beijing Institute of Technology, Beijing 100081, China. wen19841209@sina.com
authors.forename: Wen
authors.initials: W
authors.lastname: Ji
authors.forename: Shufen
authors.initials: S
authors.lastname: Chen
authors.forename: Lei
authors.initials: L
authors.lastname: Fu
authors.forename: Zhengfeng
authors.initials: Z
authors.lastname: Zou