Modeling and evaluating the performance of Brillouin distributed optical fiber sensors
Modeling and evaluating the performance of Brillouin distributed optical fiber sensors
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DOI：
10.1364/oe.21.031347
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发表时间：
2013-12-16
期刊：
影响因子：
3.8
通讯作者：
Thevenaz, Luc
中科院分区：
文献类型：
--
作者：
Soto, Marcelo A.;Thevenaz, Luc
深入分析了影响布里渊分布式光纤传感器性能的关键因素。推导出了一个解析表达式，估计的布里渊峰值增益频率的测定误差的基础上，第一次在真实的实验条件。这个表达式是实验验证，并描述了这种频率的不确定性取决于测量参数，如布里渊增益线宽，频率扫描步和信噪比。在此基础上，考虑到非线性效应和抽运损耗的限制，提出了一种可以比较布里渊分布式传感系统性能的品质因数。该品质因数为研究界和潜在用户提供了一种可能性，可以用一种客观的度量来评估任何拟议配置所带来的真实的性能增益。(C)2013年美国光学学会
A thorough analysis of the key factors impacting on the performance of Brillouin distributed optical fiber sensors is presented. An analytical expression is derived to estimate the error on the determination of the Brillouin peak gain frequency, based for the first time on real experimental conditions. This expression is experimentally validated, and describes how this frequency uncertainty depends on measurement parameters, such as Brillouin gain linewidth, frequency scanning step and signal-to-noise ratio. Based on the model leading to this expression and considering the limitations imposed by nonlinear effects and pump depletion, a figure-of-merit is proposed to fairly compare the performance of Brillouin distributed sensing systems. This figure-of-merit offers to the research community and to potential users the possibility to evaluate with an objective metric the real performance gain resulting from any proposed configuration. (C) 2013 Optical Society of America