Precise Fault Location in WDM-PON by Utilizing Wavelength Tunable Chaotic Laser
Precise Fault Location in WDM-PON by Utilizing Wavelength Tunable Chaotic Laser
复制标题
利用波长可调谐混沌激光器对WDM-PON进行精确故障定位
DOI：
10.1109/jlt.2012.2220755
复制
发表时间：
2012-11-01
影响因子：
4.7
通讯作者：
Wang, Yuncai
中科院分区：
文献类型：
--
作者：
Wang, Anbang;Wang, Na;Wang, Yuncai
提出了一种利用波长可调谐混沌激光器精确定位波分复用无源光网络故障的方法。该混沌激光器由一个模式匹配WDM-PON通道的多纵模Fabry-Perot （FP）激光二极管和一个包含滤波器的光反馈环路组成。环路将一种模式的一定比例的光通过滤光器送入激光腔，产生混沌光。通过调整滤波器的频率，可以调整混沌光的波长，从而诊断出WDM-PON的相应分支。我们演示了一个用于检测三个ITU信道的概念验证实验。通过将后反射光与其延迟的重复光相关联来实现故障定位。结果表明，该系统的空间分辨率为2 cm，动态范围约为20.8dB。此外，我们还实验研究了反馈光的强度水平和波长不匹配对FP激光器混沌输出的影响。
We propose a method to locate precisely faults in wavelength-division-multiplexing (WDM) passive optical network (PON) by using a wavelength tunable chaotic laser. The chaotic laser consists of a multiple-longitudinal-mode Fabry-Perot (FP) laser diode whose modes match the channels of WDM-PON, and an optical feedback loop including a filter. The loop feeds a proportion of light of one mode that passes through the filter back into laser cavity to generate chaotic light. By adjusting the filter frequency, we can tune the wavelength of the chaotic light, and diagnose the corresponding branch of WDM-PON. We demonstrate a proof-of-concept experiment for detection of three ITU channels. Fault location is realized by correlating the back-reflected light with its time-delayed duplicate. The results show that spatial resolution of 2 cm and dynamic range of about 20.8dB can be achieved. In addition, we have experimentally studied the effects of the strength level and wavelength mismatching of the feedback light on the chaotic output of the FP laser.