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Fault localization in WDM passive optical network by reusing downstream light sources

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4 Author(s)
Lim, K.W. ; Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea ; Son, E.S. ; Han, K.H. ; Chung, Y.C.

We propose and demonstrate a simple and cost-effective technique to detect and localize the fiber failures in wavelength-division-multiplexed (WDM) passive optical networks. By reusing the downstream lasers as WDM light sources for the optical time-domain reflectometry, the proposed technique can localize the failures in both feeder and drop fibers without using the expensive tunable laser.

Published in:

Photonics Technology Letters, IEEE  (Volume:17 ,  Issue: 12 )