Analysis of resonance asymmetry phenomenon in resonator integrated optic gyro  

作　　者：Yao Fei Yu-Ming He Xiao-Dong Wang Fu-Hua Yang Zhao-Feng Li 费瑶;何玉铭;王晓东;杨富华;李兆峰(Engineering Research Center for Semiconductor Integrated Technology, Institute of Semiconductors, Chinese Academy of Sciences;College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Science;School of Microelectronics, University of Chinese Academy of Sciences)

机构地区：[1]Engineering Research Center for Semiconductor Integrated Technology,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China [2]College of Materials Science and Opto-Electronic Technology,University of Chinese Academy of Science,Beijing 100049,China [3]School of Microelectronics,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Physics B》2018年第8期297-300,共4页中国物理B（英文版）

基　　金：Project supported by the National Key Research and Development Program of China(Grant No.2016YFA02005003);the National Natural Science Foundation of China(Grant Nos.61274066,61504138,and 61474115)

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.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.

关 键 词：GYROSCOPES optical sensing and sensors resonators 

分 类 号：O4[理学—物理]