Analysis of the normal mode effect in resonator integrated optic gyro

YuMing He; Zuo Feng; FuHua Yang; Wei Yan; WeiHua Han; ZhaoFeng Li

doi:10.1117/12.2549856

20 December 2019 Analysis of the normal mode effect in resonator integrated optic gyro

YuMing He, Zuo Feng, FuHua Yang, Wei Yan, WeiHua Han, ZhaoFeng Li

Proceedings Volume 11209, Eleventh International Conference on Information Optics and Photonics (CIOP 2019); 112094H (2019) https://doi.org/10.1117/12.2549856
Event: Eleventh International Conference on Information Optics and Photonics (CIOP 2019), 2019, Xi'an, China

Abstract

Resonantor Integrated Optic Gyro (RIOG) is a type of high-accuracy gyroscope based on the Sagnac effect. The shape of the resonance curve determines the limited sensitivity of RIOG. Any asymmetry of the resonance curve will not only induce a bias error into the gyro output, but also decrease the frequency discrimination coefficient of the demodulation curve. The differential nomal mode loss is suspected to be the major noise induces the resonance curve asymmetry. In this paper, the normal mode effect is fully investigated and the conclusions are verified by Finite-Difference Time-Domain (FDTD) simulation software. Two kinds of asymmetry resonance line shape were found in experiment. Analysis shows that the bending direction of the resonance curve is related to the sidewall roughness between coupler inside and outside, and the resonance asymmetry ratio is linearly proportional to the two nomal modes throughput difference.

Citation Download Citation

YuMing He, Zuo Feng, FuHua Yang, Wei Yan, WeiHua Han, and ZhaoFeng Li "Analysis of the normal mode effect in resonator integrated optic gyro", Proc. SPIE 11209, Eleventh International Conference on Information Optics and Photonics (CIOP 2019), 112094H (20 December 2019); https://doi.org/10.1117/12.2549856

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