In this paper, a new distributed fiber optic sensor system based on dual sensing directions by polarization optical time-domain reflectometer (POTDR) is proposed. Using a single POTDR scheme, the system is able to detect signals in the forward direction and backward direction simultaneously. It can detect more perturbations applied on the fiber simultaneously than a traditional POTDR. It can also improve the positioning accuracy of POTDR by judging the perturbations from both directions. The proposed method is cost effective and has good potential in the application of intrusion monitoring.

中文翻译：

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基于双传感方向的POTDR系统

本文提出了一种基于偏振光时域反射仪（POTDR）双传感方向的新型分布式光纤传感器系统。使用单个 POTDR 方案，系统能够同时检测正向和反向信号。与传统的 POTDR 相比，它可以同时检测更多施加在光纤上的扰动。还可以通过判断两个方向的扰动来提高POTDR的定位精度。所提出的方法具有成本效益，在入侵监控应用中具有良好的潜力。