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Non-Hermitian ring laser gyroscopes with enhanced Sagnac sensitivity

Author

Listed:
  • Mohammad P. Hokmabadi

    (University of Central Florida)

  • Alexander Schumer

    (University of Central Florida
    Vienna University of Technology (TU Wien))

  • Demetrios N. Christodoulides

    (University of Central Florida)

  • Mercedeh Khajavikhan

    (University of Central Florida
    University of Southern California)

Abstract

Gyroscopes are essential to many diverse applications associated with navigation, positioning and inertial sensing1. In general, most optical gyroscopes rely on the Sagnac effect—a relativistically induced phase shift that scales linearly with the rotational velocity2,3. In ring laser gyroscopes (RLGs), this shift manifests as a resonance splitting in the emission spectrum, which can be detected as a beat frequency4. The need for ever more precise RLGs has fuelled research activities aimed at boosting the sensitivity of RLGs beyond the limits dictated by geometrical constraints, including attempts to use either dispersive or nonlinear effects5–8. Here we establish and experimentally demonstrate a method using non-Hermitian singularities, or exceptional points, to enhance the Sagnac scale factor9–13. By exploiting the increased rotational sensitivity of RLGs in the vicinity of an exceptional point, we enhance the resonance splitting by up to a factor of 20. Our results pave the way towards the next generation of ultrasensitive and compact RLGs and provide a practical approach for the development of other classes of integrated sensor.

Suggested Citation

  • Mohammad P. Hokmabadi & Alexander Schumer & Demetrios N. Christodoulides & Mercedeh Khajavikhan, 2019. "Non-Hermitian ring laser gyroscopes with enhanced Sagnac sensitivity," Nature, Nature, vol. 576(7785), pages 70-74, December.
    • Handle: RePEc:nat:nature:v:576:y:2019:i:7785:d:10.1038_s41586-019-1780-4
    DOI: 10.1038/s41586-019-1780-4
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    Cited by:

    1. Arunn Suntharalingam & Lucas Fernández-Alcázar & Rodion Kononchuk & Tsampikos Kottos, 2023. "Noise resilient exceptional-point voltmeters enabled by oscillation quenching phenomena," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    2. Yuxiang Li & Zhihe Guo & Xuyang Zhao & Sheng Liu & Zhenmin Chen & Wen-Fei Dong & Shixiang Wang & Yun-Lu Sun & Xiang Wu, 2024. "An all-optical multidirectional mechano-sensor inspired by biologically mechano-sensitive hair sensilla," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    3. Xin Zhou & Xingjing Ren & Dingbang Xiao & Jianqi Zhang & Ran Huang & Zhipeng Li & Xiaopeng Sun & Xuezhong Wu & Cheng-Wei Qiu & Franco Nori & Hui Jing, 2023. "Higher-order singularities in phase-tracked electromechanical oscillators," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    4. Xingwei Gao & Hao He & Scott Sobolewski & Alexander Cerjan & Chia Wei Hsu, 2024. "Dynamic gain and frequency comb formation in exceptional-point lasers," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    5. J.-W. Zhang & J.-Q. Zhang & G.-Y. Ding & J.-C. Li & J.-T. Bu & B. Wang & L.-L. Yan & S.-L. Su & L. Chen & F. Nori & Ş. K. Özdemir & F. Zhou & H. Jing & M. Feng, 2022. "Dynamical control of quantum heat engines using exceptional points," Nature Communications, Nature, vol. 13(1), pages 1-7, December.

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