针对连续分布式布里渊光纤传感器的传感特性与阈值问题,根据光纤中泵浦光与斯托克斯光之间耦合波方程,推导出布里渊散射阈值的关系式.通过计算分析该关系式与入射光的脉冲宽度、光纤半径和温度的关系,提出了基于脉冲光布里渊散射的阈值理论估算模型.在实验中,利用布里渊光时域反射仪系统,得出了脉冲光布里渊阈值特性,并与理论模型的结果进行对比分析,实验证明了该脉冲光阈值模型的结果与实验得到的布里渊阈值能够较好地吻合.
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