光学精密工程2017，Vol.25Issue(9)：2283-2291,9.DOI:10.3788/OPE.20172509.2283
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
Vernier effect based on optical fiber Sagnac interference loop with two angle shift spliced polarization maintaining fibers and its application on temperature sensor
摘要
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 angle shift spliced polarization maintaining fibers was applied as a fiber temperature sensor experimentally .T he results show that the sensitivity of the proposed temperature sensor based on Sagnac interference loop is -2 .44 nm/℃ within 2 cm temperature zone ,which is 14 .97 times as compared with that (-0 .163 nm/℃) of ordinary Sagnac loop sensors without vernier effect .关键词
光纤传感/温度传感器/Sagnac干涉仪/光学游标效应/保偏光纤Key words
optical sensing/temperature sensor/sagnac interferometer/optical vernier effect/oolarization maintaining fiber分类
信息技术与安全科学引用本文复制引用
赵春柳,丁振名,吴彬青..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[J].光学精密工程,2017,25(9):2283-2291,9.基金项目
浙江省自然科学基金资助项目(No.LY17F050010) （No.LY17F050010）
