Acta Photonica Sinica, Volume. 41, Issue 11, 1279(2012)
Fault Location for WDM-PON by Using a Tunable Chaotic Fabry-Perot Laser
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.
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WANG Na, WANG An-bang, ZHANG Ming-jiang, XU Hang, YANG Ling-zhen, WANG Yun-cai. Fault Location for WDM-PON by Using a Tunable Chaotic Fabry-Perot Laser[J]. Acta Photonica Sinica, 2012, 41(11): 1279
Received: Jul. 9, 2012
Accepted: --
Published Online: Nov. 6, 2012
The Author Email: Na WANG (wangnazai2000@163.com)