title: Backward Secondary-Wave Coherence Errors in Photonic Bandgap Fiber Optic Gyroscopes.
abstract: Photonic bandgap fiber optic gyroscope (PBFOG) is a novel fiber optic gyroscope (FOG) with excellent environment adaptability performance compared to a conventional FOG. In this work we find and investigate the backward secondary-wave coherence (BSC) error, which is a bias error unique to the PBFOG and caused by the interference between back-reflection-induced and backscatter-induced secondary waves. Our theoretical and experimental results show a maximum BSC error of ~4.7°/h for a 300-m PBF coil with a diameter of 10 cm. The BSC error is an important error source contributing to bias instability in the PBFOG and has to be addressed before practical applications of the PBFOG can be implemented.
authors.affiliation: Department of Opto-electronics Engineering, Beihang University, Beijing 100191, China. xuxiaobin@buaa.edu.cn.
authors.forename: Xiaobin
authors.initials: X
authors.lastname: Xu
authors.affiliation: Department of Opto-electronics Engineering, Beihang University, Beijing 100191, China. songnf@buaa.edu.cn.
authors.forename: Ningfang
authors.initials: N
authors.lastname: Song
authors.affiliation: Department of Opto-electronics Engineering, Beihang University, Beijing 100191, China. zzc1022@163.com.
authors.forename: Zuchen
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Department of Opto-electronics Engineering, Beihang University, Beijing 100191, China. jinjing@buaa.edu.cn.
authors.forename: Jing
authors.initials: J
authors.lastname: Jin
keywords: bias error; fiber optic gyroscope; photonic bandgap fiber