基于BOTDA的分布式光纤高温传感研究(特邀)  

Distributed fiber high-temperature sensing based on BOTDA(invited)

作　　者：徐鹏柏 王晓龙 温坤华[1] 郑永秋 周金运[1] 董永康[4] 董新永 杨军[1,2] 王云才 秦玉文 Xu Pengbai;Wang Xiaolong;Wen Kunhua;Zheng Yongqiu;Zhou Jinyun;Dong Yongkang;Dong Xinyong;Yang Jun;Wang Yuncai;Qin Yuwen(Guangdong Provincial Key Laboratory of Photonics Information Technology,Guangzhou 510006,China;School of Information Engineering,Guangdong University of Technology,Guangzhou 510006,China;School of Instrument and Electronics,North University of China,Taiyuan 030051,China;National Key Laboratory of Science and Technology on Tunable Laser,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]广东工业大学广东省信息光子技术重点实验室,广东广州510006 [2]广东工业大学信息工程学院,广东广州510006 [3]中北大学仪器与电子学院,山西太原030051 [4]哈尔滨工业大学可调谐(气体)激光技术国家级重点实验室,黑龙江哈尔滨150001

出　　处：《红外与激光工程》2022年第10期32-40,共9页Infrared and Laser Engineering

基　　金：国家自然科学基金重点项目(62131018);国家自然科学基金青年项目(62005055)。

摘　　要：基于布里渊光时域分析(Brillouin optical time-domain analysis,BOTDA)测量技术分别研究了单模光纤、光子晶体光纤和镀金光纤在1100℃、1200℃和1000℃的高温传感特性,通过对石英光纤的布里渊频移(Brillouin frequency shift,BFS)跳跃现象和涂覆层燃烧现象进行研究,指出石英光纤均需要退火才能够达到热稳定状态。退火后,三种光纤的布里渊频移随温度呈非线性变化。其中,单模光纤和光子晶体光纤高温状态下涂覆层气化,二氧化硅发生晶化导致其机械强度大幅下降,因此仅能作为一次性高温传感器;镀金光纤由于金涂层具有较高的熔点和良好的气密性,高温退火后仍然能够保持良好的机械强度,因此可以作为一种重复使用的高温传感器。该研究有望为高温传感应用(如涡轮发动机内部温度监测)提供一种技术参考。In this paper,the high temperature sensing properties of single-mode fiber,photonic crystal fiber,and gold-coated fiber at 1100℃,1200℃,and 1000℃were studied based on Brillouin optical time-domain analysis(BOTDA).The fact of Brillouin frequency shift(BFS)hopping and the coating burning indicated that the silica fiber should be annealed to reach a thermally stable state.After annealing,the BFS of the three kinds of fibers increased with temperature nonlinearly.The coating of single-mode fiber and photonic crystal fiber burned at high temperatures.And the crystallization of silicon doped its mechanical strength,indicating that it can only be used as a one-time high-temperature sensor.The gold-coated fiber with a higher melting point and better hermeticity can maintain good mechanical strength after high-temperature annealing,so it is a reusable high-temperature sensor.The research in this paper showed the potential for high-temperature sensing applications such as temperature monitoring of turbine engines.

关 键 词：分布式光纤高温传感 布里渊光时域分析仪 光子晶体光纤 镀金光纤 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]