Fiber Optics Group, Department of Physics, University of Ottawa, Ottawa, Ontario, K1N 6N5, Canada.
Opt Lett. 2011 Jan 15;36(2):277-9. doi: 10.1364/OL.36.000277.
We propose and demonstrate a high-performance and long-range Brillouin optical time-domain analysis (BOTDA) based on time-division multiplexing measurement, where a probe pulse and a pump pulse are used to perform the measurement on a selected sensing section, and the measurement of the entire sensing fiber is realized by combining the series measurements over different sections through changing the delay time between the two pulses. In experiment, a 100 km sensing fiber is divided into 11 sections based on the gain-controlled principle, and spatial resolutions of 0.6 m and 2 m are obtained at the end of 75 km and 100 km, respectively.
我们提出并演示了一种基于时分复用测量的高性能、长距离布里渊光时域分析（BOTDA）技术，其中使用一个探测脉冲和一个泵浦脉冲对选定的传感段进行测量，并通过改变两个脉冲之间的延迟时间，将不同段的串联测量组合起来，从而实现对整个传感光纤的测量。在实验中，根据增益控制原理将 100km 传感光纤分成 11 段，在 75km 和 100km 末端分别获得 0.6m 和 2m 的空间分辨率。
