Title :
A variable-gain optical amplifier for metro WDM networks with mixed span losses: a gain-clamped semiconductor optical amplifier combined with a Raman fiber amplifier
Author :
Lee, H.H. ; Oh, J.M. ; Lee, D. ; Han, J. ; Chung, H.S. ; Kim, K.
Author_Institution :
Dept. of Phys., Chungnam Nat. Univ., Daejeon, South Korea
fDate :
6/1/2005 12:00:00 AM
Abstract :
We propose a variable-gain optical amplifier that exhibits excellent performance in metro wavelength-division-multiplexing networks containing mixed span losses. The amplifier consists of a variable-gain Raman fiber amplifier and a gain-clamped semiconductor optical amplifier. Each span of different loss is exactly compensated by adjusting the pump power of a Raman laser diode to have the maximum optical signal-to-noise ratio. Sixteen channels of 10-Gb/s signals were successfully transmitted over 170 km of mixed span losses (total, 87 dB) under dynamic additions/removals situations.
Keywords :
Raman lasers; compensation; metropolitan area networks; optical communication equipment; optical fibre LAN; optical fibre amplifiers; optical losses; optical pumping; semiconductor optical amplifiers; telecommunication channels; wavelength division multiplexing; 10 Gbit/s; 160 Gbit/s; 170 km; 87 dB; Raman fiber amplifier; Raman laser diode; gain-clamped semiconductor optical amplifier; metro WDM networks; metro wavelength-division-multiplexing networks; mixed span losses; optical signal-to-noise ratio; variable-gain optical amplifier; Optical amplifiers; Optical fiber amplifiers; Optical fiber losses; Optical fiber networks; Optical losses; Optical pumping; Performance loss; Semiconductor optical amplifiers; Stimulated emission; WDM networks; Gain clamping; Raman fiber amplifier (RFA); semiconductor optical amplifier (SOA); variable gain;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.846916
