弯曲损耗对分布式光纤拉曼测温解调的影响  

Influence of Bending Loss to Demodulation on Distributed Fiber Raman Temperature Measurement

作　　者：申文博 张东生[2] Shen Wenbo;Zhang Dongsheng(School of Mechanical Engineering,Wuhan University of Technology,Wuhan 430070,Hubei,China;National Engineering Laboratory for Fiber Optic Sensing Technology,Wuhan University of Technology,Wuhan 430070,Hubei,China)

机构地区：[1]武汉理工大学机械工程学院,湖北武汉430070 [2]武汉理工大学光纤传感技术国家工程实验室,湖北武汉430070

出　　处：《激光与光电子学进展》2023年第5期92-96,共5页Laser & Optoelectronics Progress

摘　　要：研究了弯曲损耗对分布式光纤拉曼测温解调的影响,从理论上分析了单路解调算法和双路解调算法的解调原理,并通过实验验证了两种解调算法对存在多处弯曲损耗光纤的温度解调可行性。实验结果表明,两种解调算法均可适用于已发生弯曲损耗光纤的温度解调,但对于发生弯曲损耗位置附近的光纤,单路解调算法的准确度和波动性优于双路解调算法。The influence of bending loss on distributed fiber Raman temperature measurement demodulation is studied,the demodulation concept of the singlechannel and dualchannel demodulation algorithms is theoretically investigated,and tests are used to confirm the viability of the two demodulation algorithms for temperature demodulation of multibend loss fibers.The experimental results suggest that the temperature demodulation of the fiber with bending loss may be achieved using the two demodulation algorithms.However,the singlechannel demodulation algorithm’s accuracy and volatility are superior to the twochannel demodulation algorithm for the fiber close to the point of bending loss.

关 键 词：光纤光学 分布式光纤测温系统 温度解调算法 光纤损耗 

分 类 号：O434.12[机械工程—光学工程]