Title :
Noise evolution along optically amplified links in presence of nonlinear parametric gain
Author :
Norgia, Michele ; Giuliani, Guido ; Donati, Silvano
Author_Institution :
Dipt. di Elettronica, Pavia Univ., Italy
fDate :
10/1/1999 12:00:00 AM
Abstract :
With a semiclassical model of the optical amplifier, we calculate the evolution of noise along optically amplified lines in presence of nonlinear interaction between signal and amplified spontaneous emission, amplifier saturation, fiber dispersion and vacuum field fluctuations associated with attenuation of the fiber. The noise figure (NF) is calculated for two representative cases of long and short-distance links with different numbers of optical amplifiers and for several fiber dispersions. Results indicate that the optimum number of optical amplifiers is limited by the increase of nonlinear effects with signal power
Keywords :
erbium; optical fibre amplifiers; optical fibre communication; optical fibre dispersion; optical fibre losses; optical noise; optical saturation; superradiance; Er-doped optical fibre amplifiers; amplified spontaneous emission; amplifier saturation; fiber dispersion; fiber dispersions; fibre attenuation; long-distance links; noise figure; nonlinear effects; nonlinear parametric gain; optically amplified lines; optically amplified links; optimum number; semiclassical model; short-distance links; signal power; vacuum field fluctuations; Fiber nonlinear optics; Fluctuations; Nonlinear optics; Optical attenuators; Optical fiber amplifiers; Optical noise; Optical saturation; Semiconductor optical amplifiers; Spontaneous emission; Stimulated emission;
Journal_Title :
Lightwave Technology, Journal of
