利用可调谐的混沌Fabry-Perot激光器实现波分复用无源光网络的断点检测  

Fault Location for WDM-PON by Using a Tunable Chaotic Fabry-Perot Laser

作　　者：王娜[1] 王安帮[2] 张明江[2] 徐航[1] 杨玲珍[1] 王云才[2] 

机构地区：[1]太原理工大学光电工程研究所,太原030024 [2]中国科学院西安光学精密机械研究所,西安710119

出　　处：《光子学报》2012年第11期1279-1285,共5页Acta Photonica Sinica

基　　金：国家自然科学基金(No.61107033);国家自然科学基金青年科学基金(No.60908014);山西省青年科学基金(No.2009021003);瞬态光学与光子技术国家重点实验室开放基金(No.SKLST201015)资助

摘　　要：波分复用无源光网络具有支路多、节点密的特征,为精确定位各支路的断点,提出了一种基于可调谐混沌Fabry-Perot激光器的检测方法.将光反馈多纵模Fabry-Perot半导体激光器作为混沌光源,在改变反馈光光波模式的条件下输出波长可调谐的混沌激光.以探测光的波长标记各被测支路,将探测信号和携带延时信息的回波信号进行互相关运算,根据相关曲线峰值的位置即可完成定位.分析了可调谐混沌源的特性,并以1×4的波分复用无源光网络为例,进行了初步的实验验证,结果表明该方法可以精确定位光网络支路中连接点及断点的位置,空间分辨率达4cm,且与探测距离无关.The main characteristic of WDM-PON is the node-tree structure.In order to preciously locate faults in each branch,a method based on tunable chaotic Fabry-Perot laser is proposed.Chaotic light emitted from a optical feedback multiple-longitudinal mode Fabry-Perot semiconductor laser diode is utilized as the probe beam.By selecting the feedback mode,a tunable chaotic laser is obtained.The branches of the optical networks are distinguished by the laser′s wavelength,and fault location is realized by calculating the cross-correlation of transmitted and back-reflected signals.In the experiment,we analyse the chaotic property and take a 1×4 ITU WDM-PON to be detected,the measurement results show that the breakpoints and connectors could be preciously located,an rang-independent spatial resolution within 4 cm are achieved with this method.

关 键 词：混沌 光网络断点检测 Fabry-Perot激光器 光时域反射仪 

分 类 号：TN929.11[电子电信—通信与信息系统] TN929.18[电子电信—信息与通信工程]