Nanophotonic optical gyroscope with sensitivity enhancement around mirroredexceptional points

OPTICS COMMUNICATIONS

卷:483

Article

Chen, Changdong^1,2  Xie, Yijun²  Huang, Shu-Wei² 

[1] Nanjing Univ Aeronaut & Astronaut, Nanjing 211100, Peoples R China

[2] Univ Colorado, Dept Elect Comp & Energy Engn, Boulder, CO 80309 USA

关键词: Optical gyroscope;    Exceptional point;    Ring cavity;   

DOI  :  10.1016/j.optcom.2020.126674

来源: Elsevier

【 摘 要 】

Unavoidable thermal fluctuation and fabrication error severely compromise the sensing performance of nanophotonic optical gyroscope devices in practice. In this paper, we theoretically propose a doubly-coupled ring gyroscope system that not only takes advantage of exceptional point enhanced rotation sensitivity but also improves the robustness against thermal fluctuation and fabrication error. In the doubly-coupled-ring gyroscope with gains, two mirrored exceptional point supermodes experience opposite responses to rotation but same response to thermal fluctuation and fabrication error. Thus, differential readout of the frequency splitting from the two mirrored exceptional point supermodes results in a nearly 100% common-mode noise rejection and remarkably enhances the measurement precision and sensitivity of the photonic optical gyroscope. The proposed doubly-coupled-ring system is a promising platform for not only the novel photonic optical gyroscope but also the next-generation exceptional point sensor in general.

【 授权许可】

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