中国物理B ›› 2024, Vol. 33 ›› Issue (8): 84204-084204.doi: 10.1088/1674-1056/ad4324

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

Xinsheng Ding(丁鑫圣)1, Wenyao Liu(刘文耀)1,2,†, Shixian Wang(王师贤)1, Yu Tao(陶煜)1, Yanru Zhou(周彦汝)1,2, Yu Bai(白禹)1,2, Lai Liu(刘来)1,2, Enbo Xing(邢恩博)1,2, Jun Tang(唐军)1,2,‡, and Jun Liu(刘俊)1,2,§   

  1. 1 State Key Laboratory of Dynamic Measurement Technology, North University of China, Taiyuan 030051, China;
    2 Shanxi Province Key Laboratory of Quantum Sensing and Precision Measurement, North University of China, Taiyuan 030051, China
  • 收稿日期:2023-11-21 修回日期:2024-04-24 出版日期:2024-08-15 发布日期:2024-07-15
  • 通讯作者: Wenyao Liu, Jun Tang, Jun Liu E-mail:liuwenyao@nuc.edu.cn;tangjun@nuc.edu.cn;liuj@nuc.edu.cn
  • 基金资助:
    Project supported in part by the National Natural Science Foundation of China (Grant Nos. 62273314, U21A20141, and 51821003); Fundamental Research Program of Shanxi Province (Grant No. 202303021224008); and Shanxi Province Key Laboratory of Quantum Sensing and Precision Measurement (Grant No. 201905D121001).

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

Xinsheng Ding(丁鑫圣)1, Wenyao Liu(刘文耀)1,2,†, Shixian Wang(王师贤)1, Yu Tao(陶煜)1, Yanru Zhou(周彦汝)1,2, Yu Bai(白禹)1,2, Lai Liu(刘来)1,2, Enbo Xing(邢恩博)1,2, Jun Tang(唐军)1,2,‡, and Jun Liu(刘俊)1,2,§   

  1. 1 State Key Laboratory of Dynamic Measurement Technology, North University of China, Taiyuan 030051, China;
    2 Shanxi Province Key Laboratory of Quantum Sensing and Precision Measurement, North University of China, Taiyuan 030051, China
  • Received:2023-11-21 Revised:2024-04-24 Online:2024-08-15 Published:2024-07-15
  • Contact: Wenyao Liu, Jun Tang, Jun Liu E-mail:liuwenyao@nuc.edu.cn;tangjun@nuc.edu.cn;liuj@nuc.edu.cn
  • Supported by:
    Project supported in part by the National Natural Science Foundation of China (Grant Nos. 62273314, U21A20141, and 51821003); Fundamental Research Program of Shanxi Province (Grant No. 202303021224008); and Shanxi Province Key Laboratory of Quantum Sensing and Precision Measurement (Grant No. 201905D121001).

摘要: 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.

关键词: exceptional surface, exceptional points, ring resonator, angular rate sensing, rotational direction recognition, wide operating range

Abstract: 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.

Key words: exceptional surface, exceptional points, ring resonator, angular rate sensing, rotational direction recognition, wide operating range

中图分类号:  (Sensors, gyros)

  • 42.81.Pa
42.81.Qb (Fiber waveguides, couplers, and arrays)