Title :
Novel in-service supervisory system using OTDR for long-haul WDM transmission link including cascaded in-line EDFAs
Author :
Kim, Pilhan ; Yoon, Hosung ; Seo, Jae-eun ; Jeong, Kitae ; Ryoo, Ki-Won ; Lee, Kyu-Haeng ; Park, Namkyoo
Author_Institution :
Opt. Commun. Syst. Lab., Seoul Nat. Univ., South Korea
Abstract :
We propose and demonstrate a novel optical supervisory system for long-haul wavelength-division-muitiplexing (WDM) transmission link including cascaded erbium-doped fiber amplifiers (EDFAs). By employing a modified optical time domain reflectometry technique with a wavelength selective bidirectional EDFA, it was possible to monitor the status of the WDM transmission link and EDFA at in-service states with negligible power penalty. Proof of the concept with a 2.5 Gb/s/spl times/eight-channel WDM transmission system [single-mode fiber, 320 km] shows clear trace of the transmission line loss/gain/reflection map with minimal signal power penalty of 0.3 dB.
Keywords :
optical fibre amplifiers; optical fibre testing; optical time-domain reflectometry; telecommunication channels; telecommunication network management; wavelength division multiplexing; 10 Gbit/s; 2.5 Gbit/s; 320 km; OTDR; WDM transmission link; cascaded erbium-doped fiber amplifiers; cascaded in-line EDFAs; eight-channel WDM transmission system; in-service supervisory system; long-haul WDM transmission link; long-haul wavelength-division-muitiplexing; minimal signal power penalty; modified optical time domain reflectometry technique; negligible power penalty; reflection map; single-mode fiber; transmission line gain; transmission line loss; wavelength selective bidirectional EDFA; Erbium-doped fiber amplifier; Optical fibers; Optical pulses; Optical receivers; Optical scattering; Optical sensors; Probes; Pulse amplifiers; Stimulated emission; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
