中国物理B ›› 2018, Vol. 27 ›› Issue (8): 84213-084213.doi: 10.1088/1674-1056/27/8/084213
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
Yao Fei(费瑶), Yu-Ming He(何玉铭), Xiao-Dong Wang(王晓东), Fu-Hua Yang(杨富华), Zhao-Feng Li(李兆峰)
Yao Fei(费瑶)1,2, Yu-Ming He(何玉铭)1,2, Xiao-Dong Wang(王晓东)1,3, Fu-Hua Yang(杨富华)1,3, Zhao-Feng Li(李兆峰)1,3
摘要: Resonator integrated optic gyro (RIOG) is a high-accuracy gyroscope based on the Sagnac effect. The waveguide-type ring resonator is a key rotation sensing element in the RIOG. An asymmetric resonance line shape is found in the optic resonator. These asymmetries will induce offset errors when the phase modulation spectroscopy technique (PMST) is applied to the RIOG. The polarization errors and the difference among normal mode losses are found to be the two main sources of resonance asymmetry in an experiment. These sources are fully investigated and their contributions to the offset errors are compared. The analysis shows that proper modulation frequencies in clockwise (CW) and counterclockwise (CCW) directions can reduce an RIOG bias error. A transmissive resonator is recommended to obtain a better resonance line shape.
中图分类号: (Optical waveguides and couplers)