Related Experiment Video
Updated: Mar 19, 2026

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
Published on: December 3, 2013
Backward Secondary-Wave Coherence Errors in Photonic Bandgap Fiber Optic Gyroscopes
Xiaobin Xu1, Ningfang Song2, Zuchen Zhang3
1Department of Opto-electronics Engineering, Beihang University, Beijing 100191, China. xuxiaobin@buaa.edu.cn.
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.
Related Concept Videos
Gyroscope: Precession
Doppler Effect - II
Gyroscope
NMR Spectrometers: Resolution and Error Correction
Atomic Nuclei: Larmor Precession Frequency
IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations

