Distributed Fiber Strain Sensor With 1-kHz Sampling Rate Based on Brillouin Optical Correlation Domain Analysis
Distributed Fiber Strain Sensor With 1-kHz Sampling Rate Based on Brillouin Optical Correlation Domain Analysis
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DOI：
10.1117/12.734429
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发表时间：
2007-09
影响因子：
2.6
通讯作者：
K. Song;K. Hotate
中科院分区：
文献类型：
--
作者：
K. Song;K. Hotate
本文报道了一种基于光纤受激布里渊散射的高速分布式动态应变传感技术。通过应用简化的布里渊光相关域分析，优化的时间门和不平衡的马赫-曾德尔延迟线，实现了1 kHz的采样率，比以前的最佳结果高出一个数量级以上。在实验中，我们提出了各种动态应变的测量在最大频率为200 Hz，10厘米的空间分辨率和20米的测量范围。
We report the highest speed distributed sensing of dynamic strain based on stimulated Brillouin scattering in optical fibers. A sampling rate of 1 kHz, more than an order of magnitude higher than the former best result, is achieved by applying a simplified Brillouin optical correlation domain analysis with optimized time gates and an unbalanced Mach-Zehnder delay line. In experiments, we present the measurement of various dynamic strains at the maximum frequency of 200 Hz with 10-cm spatial resolution and 20-m measurement range.