光学学报, 2018, 38 (3): 0328005, 网络出版: 2018-03-20
用于动态应变测量的快速分布式布里渊光纤传感 下载: 1324次特邀综述
Fast Distributed Brillouin Optical Fiber Sensing for Dynamic Strain Measurement
传感器 非线性光纤光学 受激布里渊散射 振动分析 sensors nonlinear fiber optics stimulated Brillouin scattering vibration analysis
摘要
近些年,分布式布里渊光纤传感因具有分布式应变和温度的测量能力, 以及在结构健康监测领域的重要应用而受到广泛的研究。在多种传感方案中, 布里渊光时域分析(BOTDA)技术具有信噪比好、空间分辨率高、传感距离远等优点, 受到广泛关注。传统的BOTDA系统平均和扫频过程比较费时, 只适宜进行静态或缓慢的应变测量。通过分析BOTDA系统的分布式传感原理, 总结了限制其快速分布式传感测量的主要因素。针对这些限制因素, 综述了近期快速BOTDA系统取得的一系列的进展, 主要包括基于偏振补偿技术的快速BOTDA系统、基于光学捷变频技术的快速BOTDA系统、基于斜坡法的快速BOTDA系统、基于光学啁啾链的快速BOTDA系统、基于光学频率梳技术的快速BOTDA系统, 指出通过单一或者多个新技术组合而成的快速BOTDA系统具有更好的性能和更广阔的应用前景。
Abstract
Recently, distributed Brillouin optical fiber sensors have been extensively studied and discussed for the capacity to measure distributed strain and temperature, as well as important applications in the field of structural health monitoring. In several optical fiber sensing schemes, Brillouin optical time domain analysis (BOTDA) is widely concerned due to its good signal-to-noise ratio, high spatial resolution, and long-range sensing distance. However, due to the time-consuming averaging and frequency-sweeping processes, the classical BOTDA systems are suitable for static or slow-varying strain measurements. In this paper, we analyze the operation principle of BOTDA system and discuss some main factors for limiting fast measurement. Then, we summarize and analyze the dynamic measurement methods based on fast BOTDA, which are polarization compensation technique, frequency-agile technique, slope-assisted method, optical chirp chain technique, optical frequency comb technique. It is pointed out that the fast BOTDA system consisted of a single or multiple new techniques, has a better performance and a wider application prospect.
周登望, 王本章, 巴德欣, 徐金龙, 徐鹏柏, 姜桃飞, 张东昱, 李惠, 董永康. 用于动态应变测量的快速分布式布里渊光纤传感[J]. 光学学报, 2018, 38(3): 0328005. Zhou Dengwang, Wang Benzhang, Ba Dexin, Xu Jinlong, Xu Pengbai, Jiang Taofei, Zhang Dongyu, Li Hui, Dong Yongkang. Fast Distributed Brillouin Optical Fiber Sensing for Dynamic Strain Measurement[J]. Acta Optica Sinica, 2018, 38(3): 0328005.