Analysis of nonreciprocal noise based on mode splitting in a high-Q optical microresonator
Analysis of nonreciprocal noise based on mode splitting in a high-Q optical microresonator
复制标题
高 Q 值光学微谐振器中基于模式分裂的不可逆噪声分析
DOI:
10.1088/1555-6611/aa92f9
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发表时间:
2017
期刊:
影响因子:
1.2
通讯作者:
Shao Hui
中科院分区:
文献类型:
--
作者:
Yang Zhaohua;Xiao Yarong;Huo Jiayan;Shao Hui
The whispering gallery mode optical microresonator offers a high quality factor, which enables it to act as the core component of a high sensitivity resonator optic gyro; however, nonreciprocal noise limits its precision. Considering the Sagnac effect, i.e. mode splitting in high-quality optical micro-resonators, we derive the explicit expression for the angular velocity versus the splitting amount, and verify the sensing mechanism by simulation using finite element method. Remarkably, the accuracy of the angular velocity measurement in the whispering gallery mode optical microresonator with a quality factor of 108 is 106 °/s. We obtain the optimal coupling position of the novel angular velocity sensing system by detecting the output transmittance spectra of different vertical coupling distances and axial coupling positions. In addition, the reason for the nonreciprocal phenomenon is determined by theoretical analysis of the evanescent distribution of a tapered fiber. These results will provide an effective method and a theoretical basis for suppression of the nonreciprocal noise.
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