首页|Dynamic range expansion for optical frequency shift detection based on multiple harmonics

Dynamic range expansion for optical frequency shift detection based on multiple harmonics

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Sensors based on optical resonators often have their measurement range limited by their cavity linewidth,particularly in the measurement of time-varying signals.This paper introduces a method for optical frequency shift detection using multi-ple harmonics to expand the dynamic range of sensors based on optical resonators.The proposed method expands the measurement range of optical frequency shift beyond the cavity linewidth while maintaining measurement accuracy.The theoretical derivation of this method is carried out based on the equation of motion for an optical resonator and the recur-sive relationship of the Bessel function.Experimental results show that the dynamic range is expanded t0 4 times greater than the conventional first harmonic method while still maintaining accuracy.Furthermore,we present an objective analy-sis of the correlation between the expansion factor of the method and the linewidth and free spectrum of the optical resonator.

optical resonatoroptical frequency shiftmultiple harmonicsdynamic range expansion

周彦汝、樊李凡、徐凯、刘文耀、邢恩博、唐军、刘俊

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

School of Information & Communication Engineering,North University of China,Taiyuan 030051,China

School of Instrument & Electronics,North University of China,Taiyuan 030051,China

National Natural Science Foundation of China(NSFC)Foundation Research Project of Shanxi ProvinceShanxi Province Key Laboratory of Quantum Sensing and Precision Measurement

52305621202203021212156201905D121001002

2024

10.3788/COL202422.041201

中国光学快报(英文版)
中国光学学会 中国科学院上海光学精密机械研究所

中国光学快报(英文版)

CSTPCD
影响因子：1.305
ISSN：1671-7694
年,卷(期)：2024.22(4)