第25卷第9期 2017年9月
文章编号
1004-924X (2017 )09-2283-09
光学精密工程
Optics and Precision Engineering
保偏光纤转轴熔接 Sagnac干涉环的
光学游标效应及温度传感器
赵春柳*，丁振名·吴彬青
（中国计量大学光学与电子科技学院，浙江杭州310018）
Vol.25No.9
Sep.2017
摘要：为了实现高灵敏度的温度传感，通过在基于保偏光纤Sagnac干涉仪的Sagnac环内增加一段保偏光纤，控制两段保偏光纤快轴熔接角度接近45°,设计并制造了保偏光纤转轴熔接Sagnac干涉环结构。在理论上通过Jones矩阵推导了保偏光纤转轴熔接Sagnac干涉环的干涉谱公式，基于仿真分析研究了主要参数对保偏光纤转轴熔接Sagnac干涉环输出特性的影响。仿真结果表明，保偏光纤转轴熔接Sagnac干涉环实现了光学游标效应，两段保偏光纤的平均长度、两段保偏
轴熔接Sagnac干涉环应用在光纤温度传感器中。实验结果表明，在2cm的感温区域，保偏光纤转轴熔接Sagnac干涉环
温度传感器的灵敏度就达到了一2.44nm/℃，是普通Sagnac干涉环温度传感器（一0.163nm/℃）的14.97倍。关键词：光纤传感；温度传感器；Sagnac千涉仪；光学游标效应；保偏光纤
中图分类号：TN253;S951.4
文献标识码：A
doi:10.3788/0PE.20172509.2283
Vernier effect based on optical fiber Sagnac interference loop with two angle shift spliced polarizationmaintaining fibers and
itsapplicationontemperaturesensor ZHAO Chun-liu",DING Zhen-ming,WU Bin-qing
(College of Optical and Electronic Technology,China Jiliang University,Hangzhou310018,China)
*Corresponding author,E-mail:clzhad@cjlu.edu.cn
Abstract: An optical fiber Sagnac interference loop with two angle shift spliced polarization maintaining fibers was designed and fabricated to realize high-sensitivity temperature sensing . In the optical fiber Sagnac loop, two sections of polarization maintaining fibers were spliced with an intersection angle of 45° between their fast axes . The interference spectrum formula of the Sagnac interference loop by the Jones matrix was deduced theoretically . The influence of main parameters of the formula on the output characteristics of the Sagnac interference loop was studied in simulation The simulation results show that vernier effect can be achieved in the optical fiber Sagnac interference loop with two angle shift spliced polarization maintaining fibers , of which the average length and the length difference affect wavelength intervals and envelope periods of output interference spectra of the Sagnac interference loop , respectively . In addition , the optical fiber Sagnac interference loop with two
收稿日期：2017-04-17；修订日期：2017-05-16.
基金项目：浙江省自然科学基金资助项目（No.LY17F050010）