光子带隙光纤陀螺仪中的反向二次波相干误差

Backward Secondary-Wave Coherence Errors in Photonic Bandgap Fiber Optic Gyroscopes.

作者信息

Xu Xiaobin, Song Ningfang, Zhang Zuchen, Jin Jing

机构信息

Department of Opto-electronics Engineering, Beihang University, Beijing 100191, China.

出版信息

Sensors (Basel). 2016 Jun 8;16(6):851. doi: 10.3390/s16060851.

DOI:10.3390/s16060851

PMID:27338388

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4934277/

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.

摘要

光子带隙光纤陀螺仪（PBFOG）是一种新型光纤陀螺仪（FOG），与传统FOG相比，具有出色的环境适应性。在这项工作中，我们发现并研究了后向二次波相干（BSC）误差，这是PBFOG特有的一种偏置误差，由背向反射引起的二次波和背向散射引起的二次波之间的干涉所致。我们的理论和实验结果表明，对于一个直径为10厘米、长度为300米的光子带隙光纤线圈，最大BSC误差约为4.7°/小时。BSC误差是导致PBFOG偏置不稳定性的一个重要误差源，在PBFOG实际应用之前必须加以解决。