光学学报, 2020, 40 (7): 0706002, 网络出版: 2020-04-15
格雷编码布里渊光时域分析传感器中偏振随机噪声影响及其抑制方法 下载: 946次
Effect and Elimination of Polarization Random Noise in Golay-Coded Brillouin Optical Time Domain Analysis Fiber Sensors
光通信 分布式光纤传感 布里渊光时域分析 optical communications distributed fiber sensing Brillouin optical time domain analysis
摘要
在格雷编码布里渊光时域分析(BOTDA)传感器中,采用随机扰偏技术,不仅会在消除强偏振牵引效应时引起传感信号信噪比恶化,同时也会引入较强的偏振随机噪声(PRN)而降低传感信号的测量准确度。通过仿真分析和实验研究,证实了偏振随机噪声对传感信号的影响,并基于布里渊相移谱抑制了偏振随机噪声,实验结果表明该方法可使传感准确度提高3倍。
Abstract
Random polarization control in Golay-coded Brillouin optical time domain analysis (BOTDA) fiber sensors can be used to mitigate the deterioration in the signal-to-noise ratio caused by the strong pulling effect of polarization. However, a relatively strong polarization random noise (PRN) is induced, which may reduce the measurement accuracy of the sensing signal. In this study, the effect of PRN on the sensing signal was confirmed through simulation analysis and experimental verification. Furthermore, Brillouin phase shift was used to suppress PRN. Experimental results show that the sensing accuracy is enhanced threefold using the proposed method.
蒋朋, 闫连山, 周银, 李宗雷, 张信普, 何海军, 潘玮, 罗斌. 格雷编码布里渊光时域分析传感器中偏振随机噪声影响及其抑制方法[J]. 光学学报, 2020, 40(7): 0706002. Peng Jiang, Lianshan Yan, Yin Zhou, Zonglei Li, Xinpu Zhang, Haijun He, Wei Pan, Bin Luo. Effect and Elimination of Polarization Random Noise in Golay-Coded Brillouin Optical Time Domain Analysis Fiber Sensors[J]. Acta Optica Sinica, 2020, 40(7): 0706002.