City Research Online

Nonlinear enhanced microresonator gyroscope

Silver, J. M., Del Bino, L., Woodley, M. T. M. , Ghalanos, G. N., Svela, A., Moroney, N., Zhang, S., Grattan, K. T. V. ORCID: 0000-0003-2250-3832 & Del'Haye, P. (2021). Nonlinear enhanced microresonator gyroscope. OPTICA, 8(9), pp. 1219-1226. doi: 10.1364/optica.426018


Optical gyroscopes based on the Sagnac effect have been the mainstay of inertial navigation in aerospace and shipping for decades. These gyroscopes are typically realized either as ring-laser gyroscopes (RLGs) or fiber-optic gyroscopes (FOGs). With the recent rapid progress in the field of ultrahigh-quality optical whispering-gallery mode and ring microresonators, attention has been focused on the development of microresonator-based Sagnac gyroscopes as a more compact alternative to RLGs and FOGs. One avenue that has been explored is the use of exceptional points in non-Hermitian systems to enhance the responsivity to rotation. We use a similar phenomenon, namely, the critical point of a spontaneous symmetry-breaking transition between counterpropagating light, to demonstrate a microresonator gyroscope with a responsivity enhanced by a factor of around 104. We present a proof-of-principle rotation measurement as well as a characterization of the system’s dynamical response, which shows the universal critical behaviors of responsivity enhancement and critical slowing down, both of which are beneficial in an optical gyroscope. We believe that this concept could be used to realize simple and cheap chip-based gyroscopes with sensitivities approaching those of today’s RLGs and FOGs.

Publication Type: Article
Additional Information: © 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
T Technology > TL Motor vehicles. Aeronautics. Astronautics
Departments: School of Science & Technology > Engineering
SWORD Depositor:
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