首页|A novel dual-channel thermo-optic locking method for the whispering gallery mode microresonator

A novel dual-channel thermo-optic locking method for the whispering gallery mode microresonator

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Mode locking can be effectively achieved by using the thermo-optic effects in the whispering gallery mode(WGM)optical microcavity,without the help of external equipment.Therefore,it has the advantages of small size,low integration costs,and self-locking,which shows great potential for application.However,the conventional single-channel microcavity thermal-locking method that relies solely on internal thermal balance will inevitably be disturbed by the external envi-ronment.This limitation affects the locking time and stability.Therefore,in this paper,we propose a new method for closed-loop thermal locking of a dual-channel microcavity.The thermal locking of the signal laser and the thermal regu-lation of the control laser are carried out respectively by synchronously drawing a dual-path tapered fiber.The theoretical model of the thermal dynamics of the dual-channel microcavity system is established,and the influence of the control-laser power on the thermal locking of the signal laser is confirmed.The deviation between the locking voltage of the signal laser and the set point value is used as a closed-loop feedback parameter to achieve long-term and highly stable mode locking of the signal laser.The results show that in the 2.63 h thermal-locking test,the locking stability is an order of magnitude higher than that of the single tapered fiber.This solution addresses the issue of thermal locking being disrupted by the external environment,and offers new possibilities for important applications such as spectroscopy and micro-optical sensor devices.

optical microcavitythermo-optic lockingthermal nonlinearity effect

范文杰、刘文耀、潘梓文、王蓉、刘来、邢恩博、周彦汝、唐军、刘俊

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State Key Laboratory of Dynamic Measurement Technology,North University of China,Taiyuan 030051,China

Shanxi Province Key Laboratory of Quantum Sensing and Precision Measurement,North University of China,Taiyuan 030051,China

国家重点研发计划国家自然科学基金国家自然科学基金国家自然科学基金Fundamental Research Program of Shanxi ProvinceShanxi Province Key Laboratory of Quantum Sensing and Precision Measurement

2022YFB3203400U21A201416227331451821003202303021223001201905D121001

2024

10.1088/1674-1056/ad225f

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(5)
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