Abstract Brillouin optical time-domain analysis (BOTDA) based on optical chirp chain (OCC) has been proved that it is capable of fast and long range measurement. However, the performance of OCC-BOTDA is also limited by the issues of polarization fading and relative low signal-to-noise ratio due to transient stimulated Brillouin scattering (SBS) interaction. In this work, we propose a single shot OCC-BOTDA based on polarization diversity and image denoising. The polarization fading is suppressed by polarization diversity technique and the SNR is further enhanced by image denoising, thus the need of trace averaging is avoided. Single shot measurement of temperature over 10 km single mode fiber is achieved. The spatial resolution and temperature uncertainty are 6 m and 0.59 °C, respectively.

中文翻译：

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基于偏振分集和图像去噪的单次OCC-BOTDA

摘要 基于光学啁啾链（OCC）的布里渊光时域分析（BOTDA）已被证明具有快速、远距离测量的能力。然而，由于瞬态受激布里渊散射 (SBS) 相互作用，OCC-BOTDA 的性能也受到偏振衰落和相对低信噪比问题的限制。在这项工作中，我们提出了一种基于偏振分集和图像去噪的单次 OCC-BOTDA。偏振分集技术抑制了偏振衰落，图像去噪进一步提高了信噪比，从而避免了轨迹平均的需要。实现了 10 公里单模光纤上的单次温度测量。空间分辨率和温度不确定度分别为 6 m 和 0.59 °C。