Optical fiber temperature sensor based on beat frequency and Vernier effect of fiber ring resonator composite cavity

被引：1
作者：
Wang, Xu [1 ]
Li, Kecheng [1 ]
Wu, Xiaoyang [1 ]
Li, Bing [1 ]
Wang, Fang [1 ]
Yu, Kun [2 ]
机构：
[1] Henan Normal Univ, Coll Elect & Elect Engn, Xinxiang 453007, Peoples R China
[2] Henan Normal Univ, Sch Phys, Xinxiang 453007, Peoples R China
来源：
LASER PHYSICS | 2023年 / 33卷 / 10期
基金：
中国国家自然科学基金;
关键词：
beat frequency; Vernier effect; composite cavity laser; fiber ring resonator; LASER;
D O I：
10.1088/1555-6611/acee60
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A fiber temperature sensing scheme based on beat frequency and Vernier effect of fiber ring resonator (FRR) with composite cavity is proposed and experimentally demonstrated. The optical FRR as a sensor is put into the linear cavity fiber laser, and Vernier effect is generated when the resonance spectrum of the optical FRR and the longitudinal mode of the laser are superimposed. The beat frequency envelope spectrum corresponding to the longitudinal mode Vernier spectrum is used to realize fiber ring sensing in electrical domain, and the sensing information is obtained by tracing the envelope of beat frequency signal, which has the advantages of stable system, simple structure, low cost and high sensitivity.
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页数：7
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