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Design of a high sensitivity and wide range angular rate sensor based on exceptional surface

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It is found that when the parity-time symmetry phenomenon is introduced into the resonant optical gyro system and it works near the exceptional point,the sensitivity can in theory be significantly amplified at low angular rate.However,in fact,the exceptional point is easily disturbed by external environmental variables,which means that it depends on harsh experimental environment and strong control ability,so it is difficult to move towards practical application.Here,we propose a new angular rate sensor structure based on exceptional surface,which has the advantages of high sensitivity and high robustness.The system consists of two fiber-optic ring resonators and two optical loop mirrors,and one of the resonators contains a variable ratio coupler and a variable optical attenuator.We theoretically analyze the system response,and the effects of phase and coupling ratio on the system response.Finally,compared with the conventional resonant gyro,the sensitivity of this exceptional surface angular rate sensor can be improved by about 300 times at low speed.In addition,by changing the loss coefficient in the ring resonator,we can achieve a wide range of 600 rad/s.This scheme provides a new approach for the development of ultra-high sensitivity and wide range angular rate sensors in the future.

exceptional surfaceexceptional pointsring resonatorangular rate sensingrotational direction recognitionwide operating range

丁鑫圣、刘文耀、王师贤、陶煜、周彦汝、白禹、刘来、邢恩博、唐军、刘俊

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State Key Laboratory of Dynamic Measurement Technology,North University of China,Taiyuan 030051,China

Shanxi Province Key Laboratory of Quantum Sensing and Precision Measurement,North University of China,Taiyuan 030051,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaFundamental Research Program of Shanxi ProvinceShanxi Province Key Laboratory of Quantum Sensing and Precision Measurement

62273314U21A2014151821003202303021224008201905D121001

2024

10.1088/1674-1056/ad4324

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(8)