中文摘要：

提出了一种基于掺铒光纤放大自发辐射（ASE）光源实现波分复用无源光网络（WDM-PON）故障检测的技术。WDM-PON因其具有节点密、支路多的结构特点导致光纤链路中故障检测困难,该技术利用双程后向结构掺铒光纤ASE光源光谱的宽带特性和具有delta相关特性的时域输出,结合相关法实现分辨率为厘米量级的WDMPON光纤链路故障点定位。以8通道WDM-PON为例进行检测,结果表明该方法能够精确定位光网络中断点及松动接头的位置,并实现多故障反射事件检测。实验中获得动态范围为23dB,分辨率达到4cm,测量精度与测量距离无关。基于ASE光源的宽带特性,该技术至少可完成对32路的WDM-PON故障检测。

英文摘要：

The fault detection technique for the wavelength division multiplexing passive optical network （WDM- PON） is proposed based on an erbium-doped fiber amplified spontaneons emission （ASE） source. It is quite difficult to the link fault detection because of the multi-branch and node density structure of WDM-PON. The technology utilizes the broadband characteristics of the erbium-doped fiber ASE source with the double-pass backward configuration and the delta correlation properties of the time-domain output. It can solve the problem in the WDM-PON fault detection of fiber links. In the experiments, the detection of 8 channels WDM-PON can accurately locate the fiber breakpoint, the joint looseness, and multi-fault reflection. The results show that the 23 dB dynamic range and 4 cm spatial resolution which is independent to the measuring distance are realized. The technology is able to achieve the detection of the WDM-PON faults with 32 channels based on the broadband characteristics of the ASE source to realize WDM-PON fiber link fault location with centimeter resolution.