放大自发辐射光源结合相关法实现无源光网络故障检测  

Link Fault Detection in Passive Optical Networks Based on Correlation Method Combined with an Amplified Spontaneous Emission Source

作　　者：刘艳阳[1] 杨玲珍[1,2] 王斐斐[1] 陈曦[1] 张朝霞[1] 王娟芬[1] 刘香莲[1] 

机构地区：[1]太原理工大学物理与光电工程学院,山西太原030024 [2]新型传感器与智能控制教育部重点实验室,山西太原030024

出　　处：《中国激光》2014年第8期139-144,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金(61107033);山西省高等学校优秀青年学术带头人支持计划(2012lfjyt05)

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。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.

关 键 词：光通信 故障定位 相关法 波分复用无源光网络 放大自发辐射源 

分 类 号：TN929.11[电子电信—通信与信息系统]