基于模间干涉原理的全光纤马赫-曾德尔温度传感器  

All-Fiber Mach-Zehnder Temperature Sensor Based on Inter-Modal Interference

作　　者：吕卫卫[1] 徐峰[1] 俞本立[1] 

机构地区：[1]安徽大学物理与材料科学学院,安徽合肥230601

出　　处：《激光与光电子学进展》2014年第5期58-62,共5页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61108076);国家红外物理实验室开放基金(201007);安徽省教育厅重点研究项目(KJ2011A009)

摘　　要：根据模间干涉原理提出了一种基于细芯光敏光纤的全光纤马赫-曾德尔干涉仪(MZI)结构,并实验制作出纤芯错位的MZI。根据数值模拟对该模间干涉仪结构进行优化,获得了干涉仪的干涉谱消光比超过20 dB。通过对该传感器进行温度响应实验,分析并讨论了干涉长度及弯曲特性对其温度灵敏度的影响,最终获得的温度灵敏度达到116 pm/°C。An all-fiber Mach-Zehnder interferometer （MZI） temperature sensor based on the inter-modal interference principle is proposed and experimentally demonstrated. According to the simulation results of the MZI based on core-offset, we optimized the structural parameters of such an MZI sensor. The MZI sensor based on core-offset with the extinction ratio of more than 20 dB is obtained successfully. The performance of sensing temperature of such MZI sensors is tested. The influence of the interference length and bending structure of such MZI sensors on the temperature response are also investigated in detail. The temperature sensitivity is improved and reaches to 116 pm/℃.

关 键 词：光纤传感 细芯光敏光纤 纤芯错位 温度测量 

分 类 号：O433[机械工程—光学工程]