基于乙醇灌注边孔光纤的Sagnac干涉型温度传感器  

Sagnac Interferometer Based Temperature Sensor With Alcohol-Filled Side-Hole Fiber

作　　者：綦菲[1] 辛奕[1] 董新永[1] 孟庆强[1] 赵春柳[1] 金尚忠[1] 

机构地区：[1]中国计量学院光电子技术研究所,浙江杭州310018

出　　处：《激光与光电子学进展》2013年第1期99-102,共4页Laser & Optoelectronics Progress

基　　金：国家973计划(2010CB327804);浙江省钱江人才计划(QJD1002002)资助课题

摘　　要：提出并研究了一种基于乙醇灌注边孔光纤(SHF)的Sagnac干涉型温度传感器。边孔光纤是一种高双折射光纤,其包层中纤芯两侧具有两个空气孔。将乙醇填充进边孔光纤的空气孔中,利用乙醇的折射率随温度的变化,改变边孔光纤的双折射系数,使Sagnac干涉仪的输出谱发生波长漂移,从而实现了温度传感。实验获得该传感器在20℃～80℃的温度变化范围内灵敏度为86.8pm/℃,为普通光纤布拉格光栅(FBG)传感器的8倍。A temperature sensor by using an alcohol-filled side-hole fiber （SHF） based Sagnac interferometer is proposed and experimentally demonstrated. SHF is a highly birefringent fiber, which has two air holes running aside the core in the cladding of the fiber. Temperature changes the refractive index of the alcohol liquid filled in the air holes of the SHF, leading to the variation in birefringence of the SHF and hence interference pattern shift of the Sagnac interferometer. A sensitivity of 86.8 pm/℃ is achieved when temperature changes between 20 ℃ and 80 ℃. It is about eight times of that of a normal fiber Bragg grating （FBG） sensor.

关 键 词：光纤光学 光纤传感器 光纤Sagnac干涉仪 边孔光纤 温度测量 

分 类 号：TN253[电子电信—物理电子学]