Title :
Transmission of many WDM channels through a cascade of EDFA´s in long-distance links and ring networks
Author :
Willner, Alan E. ; Syang-Myau Hwan
Author_Institution :
Dept. of Electr. Eng. Syst., Univ. of Southern California, Los Angeles, CA, USA
fDate :
5/1/1995 12:00:00 AM
Abstract :
We analyze the transmission of many wavelength-division-multiplexed (WDM) channels through a cascade of erbium-doped fiber amplifiers (EDFA) in both long-distance links and ring-based networks. For a megameter long-distance system, optimal operating conditions are found for achieving a high signal-to-noise ratio (SNR) per channel with as small an SNR differential as possible between 20 WDM channels spaced 0.5 nm apart. Critical issues addressed in this paper include: (a) the non-uniformity of the EDFA gain with wavelength: (b) the link loss between amplifiers; (c) the small-signal gain per amplifier; and (d) the input signal power
Keywords :
erbium; fibre lasers; optical fibre losses; optical fibre networks; optical noise; optimisation; wavelength division multiplexing; EDFA cascade; EDFA gain; WDM; WDM channels th; erbium-doped fiber amplifiers; high signal-to-noise ratio; input signal power; link loss; long-distance links; megameter long-distance system; optimal operating conditions; ring networks; small-signal gain; wavelength-division-multiplexed; Erbium-doped fiber amplifier; Optical amplifiers; Optical attenuators; Optical filters; Optical losses; Optical receivers; Power amplifiers; Semiconductor optical amplifiers; Stimulated emission; Wavelength division multiplexing;
Journal_Title :
Lightwave Technology, Journal of
