基于光纤过耦合器结构的温度应变传感器  

Temperature and Strain Sensor Based on Fiber Optic Overcoupler Structure

作　　者：江升旭 柳春郁[1,2] 冷硕 韩晓鹏 杨九如[1,2] JIANG Shengxu;LIU Chunyu;LENG Shuo;HAN Xiaopeng;YANG Jiuru(College of Electronics Engineering,Heilongjiang University,Harbin 150080,China;Key Lab of Electronics Engineering,Colleges of Heilongjiang Province,Heilongjiang University,Harbin 150080,China)

机构地区：[1]黑龙江大学电子工程学院,哈尔滨150080 [2]黑龙江大学电子工程黑龙江省高校重点实验室,哈尔滨150080

出　　处：《光子学报》2021年第1期95-102,共8页Acta Photonica Sinica

基　　金：国家自然科学基金(No.61675066)。

摘　　要：从微纳光纤耦合的角度,采用单模光纤2×2耦合的方式,利用光纤过耦合设计出一种光纤传感器。通过改变光纤耦合器的拉锥参数使其达到过耦合状态,此时光纤自身的过耦合结构受环境影响导致光波长会对外界的温度和应变变化有较高的响应度,以此来实现对温度和应变的测量。实验中分别拉锥了过耦合长度为22 000μm和22 500μm的光纤过耦合器,并比较了它们的透射谱。温度和应变的传感测试结果表明,波长对温度响应度最低满足104 pm/℃,对应变响应度最低满足-21 pm/με。From the perspective of micro-nano optical fiber coupling,an optical fiber sensor is designed by using single mode optical fiber 2×2 coupling.By changing the tapering parameters of optical fiber coupler,the over-coupling state is reached.At this time,the over-coupling structure of optical fiber itself is affected by the environment,so that the wavelength of light has a higher response to the change of external temperature and strain,realizing the measurement of temperature and strain.In the experiment,optical fiber over-couplers with overcoupling length of 22 000 μm and 22 500 μm are tapered,and their transmission spectra were compared.The temperature and strain sensing tests results show that the lowest wavelength response to temperature is about 104 pm/℃,and the lowest wavelength response to strain is about -21 pm/με.

关 键 词：光纤光学 传感器 微纳光纤 温度 应变 过耦合器 

分 类 号：TN253[电子电信—物理电子学]