title: Under-Coupling Whispering Gallery Mode Resonator Applied to Resonant Micro-Optic Gyroscope.
abstract: As an important sensing element, the whispering gallery mode resonator (WGMR) parameters seriously affect the resonant micro-optic gyroscope (RMOG) performance. This work proposes an under-coupling resonator to improve the resonator'sQvalue and to optimize the coupling coefficient to maximize the RMOG's sensitivity. GeO₂-doped silica waveguide-type resonators with different coupling coefficients were simulated, designed, fabricated and tested. An under-coupling ring resonator with a quality factor of 10 million is reported. The RMOG system was built based on this resonator and the scale factor was tested on a uniaxial high-precision rotating platform. Experimental results show that this resonator could improve the RMOG sensitivity by five times.
authors.affiliation: Key Laboratory of Instrumentation Science & Dynamic Measurement of Ministry of Education, North University of China, Taiyuan 030051, China. tsienkun@163.com.
authors.forename: Kun
authors.initials: K
authors.lastname: Qian
authors.affiliation: Key Laboratory of Instrumentation Science & Dynamic Measurement of Ministry of Education, North University of China, Taiyuan 030051, China. tangjun@nuc.edu.cn.
authors.forename: Jun
authors.initials: J
authors.lastname: Tang
authors.affiliation: Key Laboratory of Instrumentation Science & Dynamic Measurement of Ministry of Education, North University of China, Taiyuan 030051, China. guohaonuc@163.com.
authors.forename: Hao
authors.initials: H
authors.lastname: Guo
authors.affiliation: Key Laboratory of Instrumentation Science & Dynamic Measurement of Ministry of Education, North University of China, Taiyuan 030051, China. liuwenyao@nuc.edu.cn.
authors.forename: Wenyao
authors.initials: W
authors.lastname: Liu
authors.affiliation: Key Laboratory of Instrumentation Science & Dynamic Measurement of Ministry of Education, North University of China, Taiyuan 030051, China. liuj@nuc.edu.cn.
authors.forename: Jun
authors.initials: J
authors.lastname: Liu
authors.affiliation: Key Laboratory of Instrumentation Science & Dynamic Measurement of Ministry of Education, North University of China, Taiyuan 030051, China. xuechenyang@nuc.edu.cn.
authors.forename: Chenyang
authors.initials: C
authors.lastname: Xue
authors.affiliation: Key Laboratory of Instrumentation Science & Dynamic Measurement of Ministry of Education, North University of China, Taiyuan 030051, China. zhengyongqiu86@163.com.
authors.forename: Yongqiu
authors.initials: Y
authors.lastname: Zheng
authors.affiliation: Key Laboratory of Instrumentation Science & Dynamic Measurement of Ministry of Education, North University of China, Taiyuan 030051, China. zcfdalianfe@126.com.
authors.forename: Chengfei
authors.initials: C
authors.lastname: Zhang
keywords: Sagnac effect; gyroscopes; planar; resonators; waveguides