The highly efficient coupling of light from conventional optical components to optical mode volumes lies in the heart of chip-based micro-devices,which is determined by the mode-matching between propagation constants of fiber taper and the whispering-gallery-mode(WGM)of the resonator.Optical gyroscopes,typically realized as fiber-optic gyroscopes and ring-laser gyroscopes,have been the mainstay in diverse applications such as position-ing and inertial sensing.Here,the mode-matching is theoretically analyzed and experimentally verified.We ob-serve the Sagnac effect in a millimeter-scale wedged resonator gyroscope,which has attracted considerable attention and has been rapidly promoted in recent years.We demonstrate a bidirectional pump and probe scheme,which directly measures the frequency beat caused by the Sagnac effect.We establish the linear response between the detected beat frequency and the rotation velocity.The clockwise and counterclockwise rotation can also be distinguished according to the value of the frequency beat.The experimental results verify the feasibility of developing the gyroscope in a WGM resonator system and pave the way for future development.

Department of Physics,State Key Laboratory of Low-Dimensional Quantum Physics,Tsinghua University,Beijing 100084,China;Beijing Academy of Quantum Information Sciences,Beijing 100193,China;Frontier Science Center for Quantum Information,Beijing 100084,China;Beijing National Research Center for Information Science and Technology,Beijing 100084,China;School of Information,Tsinghua University Beijing 100084,China

[1]XUAN MAO;HONG YANG;DAN LONG;MIN WANG;PENG-YU WEN;YUN-QI HU;BO-YANG WANG;GUI-QIN LI;JIAN-CUN GAO;GUI-LU LONG-.Experimental demonstration of mode-matching and Sagnac effect in a millimeter-scale wedged resonator gyroscope)[J].光子学研究（英文）,2022(09):2115-2121

wedged,gyroscopes

Experimental,demonstration,mode,matching,Sagnac,effect,millimeter,scale,resonator,highly,efficient,coupling,light,from,conventional,optical,components,volumes,lies,heart,chip,micro,devices,which,determined,by,between,propagation,constants,fiber,taper,whispering,gallery,WGM,Optical,typically,realized,laser,have,been,mainstay,diverse,applications,such,position,inertial,sensing,Here,theoretically,analyzed,experimentally,verified,We,serve,has,attracted,considerable,attention,rapidly,promoted,recent,years,demonstrate,bidirectional,pump,probe,scheme,directly,measures,frequency,beat,caused,establish,linear,response,detected,rotation,velocity,counterclockwise,can,also,distinguished,according,value,results,verify,feasibility,developing,system,pave,way,future,development

0.543323