Title :
Fiber link loss monitoring scheme in bidirectional WDM transmission using ASE-injected FP-LD
Author :
Lee, Kwanil ; Kang, Seung Beom ; Lim, Dong Sung ; Lee, Hak Kyu ; Sorin, Wayne V.
Author_Institution :
Novera Opt. Korea Inc., Daejon
Abstract :
We propose and demonstrate a novel fiber link loss monitoring method for a wavelength-division-multiplexed (WDM) passive optical network. This method is based on the optical signal comparison between a reference amplified spontaneous emission signal and its reflection from an optical reflector. Therefore, we can calculate the link loss exactly and also measure the characteristics of upstream optical signals without suspending the in-service channels. Since this scheme does not use narrow-band wavelength-dependent components such as fiber Bragg gratings, it is cost-effective in implementation and maintenance within a real optical network. We experimentally demonstrate that the link quality of upstream signals as well as fiber link faults on all WDM channels can be monitored in real time
Keywords :
optical communication equipment; optical fibre losses; optical fibre subscriber loops; semiconductor lasers; superradiance; telecommunication channels; wavelength division multiplexing; ASE-injected FP-LD; amplified spontaneous emission; bidirectional WDM transmission; fiber link loss monitoring; in-service channels; optical reflector; upstream optical signals; wavelength-division-multiplexing; Monitoring; Optical fiber losses; Optical fiber networks; Optical reflection; Passive optical networks; Propagation losses; Spontaneous emission; Stimulated emission; WDM networks; Wavelength division multiplexing; Access network; fiber link monitoring; fiber-to-the-home (FTTH); passive optical network (PON); wavelength-division multiplexed (WDM);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.863991
