提升Φ-OTDR系统空间分辨率的方法

Method to improve the spatial resolution of phase sensitive optical time domain reflection system

相位敏感光时域反射技术(Φ-OTDR)利用光的相位对外界因素变化敏感的特点,对外界扰动的探测效果很好。但探测场景中往往不止一个扰动点,因此需要提高Φ-OTDR系统对相邻两个扰动点的区分能力,也就是提高系统的空间分辨率。针对此问题,在可以正确探测外界扰动的Φ-OTDR系统基础上提出一种提升系统空间分辨率的数据处理方法。实验证明,使用新的数据处理方法之后的系统空间分辨率高于传统Φ-OTDR系统的理论空间分辨率。

Phase sensitive optical time domain reflectometer （φ-OTDR） is sensitive to external factors and has good detection effect on external disturbances. There are often more than one disturbing point in the detection scene, so it is necessary to improve the ability of the cb-OTDR system to distinguish between two adjacent disturbance points, which is to improve the spatial resolution of the system. Aiming at this problem, this paper proposes a data processing method for improving the spatial resolution of the system is proposed based on the φ-OTDR system which can detect the external disturbances correctly. Experiments show that the spatial resolution of the system using the new data processing method is higher than the theoretical spatial resolution of the traditional φ-OTDR system.