Incoherent Brillouin Optical Time-Domain Reflectometry With Random State Correlated Brillouin Spectrum
Incoherent Brillouin Optical Time-Domain Reflectometry With Random State Correlated Brillouin Spectrum
复制标题
具有随机态相关布里渊谱的非相干布里渊光时域反射计
DOI：
10.1109/jphot.2015.2452773
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发表时间：
2015-08-01
影响因子：
2.4
通讯作者：
Wang, Yuncai
中科院分区：
文献类型：
--
作者：
Ma, Zhe;Zhang, Mingjiang;Wang, Yuncai
提出了一种基于随机态相关布里渊谱的非相干布里渊光时域反射测量方法，并首次在实验上得到了验证。该方法基于一种新研制的宽带随机光源（混沌激光器），其带宽为光纤中布里渊谱宽度的4倍。采用可变光延迟线代替光脉冲发生器，提供光纤中温度或应变的位置分布。通过调节参考光路，可以测量出斯托克斯光和泵浦光的相同随机态的相关性，并以布里渊谱的形式表示出来。空间分辨率与混沌激光器的带宽成反比，因此，泵浦波和斯托克斯波通过它们相同的随机状态彼此关联。实验结果表明，在155米的传感范围内的0.96米的空间分辨率（由混沌激光器的带宽的限制）。
An incoherent Brillouin optical time-domain reflectometry with random state correlated Brillouin spectrum is proposed and experimentally demonstrated for the first time, which is based on a newly developed broadband random light source (chaotic laser) with a bandwidth of four times of the Brillouin spectral width in fiber. A variable optical delay line is introduced to provide location distribution of the temperature or strain in the fiber to replace the optical pulse generator. By adjusting the reference light path, the correlation of the same random state of the Stokes light and the pump light will be measured in the form of the Brillouin spectrum. The spatial resolution is inversely proportional to the bandwidth of the chaotic laser, and hence, the pump wave and Stokes wave are correlated to each other by their identical random state. The experimental result shows a 0.96-m spatial resolution (limited by the bandwidth of the chaotic laser) over a 155-m sensing range.