Title :
Noise performance evaluation of distributed erbium-doped fiber amplifiers with bidirectional pumping at 1.48 mu m
Author :
Chen, D.N. ; Desurvire, E.
Author_Institution :
Dept. of Electr. Eng., Columbia Univ., New York, NY, USA
Abstract :
An accurate model for unsaturated fiber amplifiers with fiber background loss is used to determine optimal parameters for distributed amplification in erbium-doped fibers. Pump power at 1.48 mu m and erbium-doping levels required for transparency are studied for both unidirectional and bidirectional pumping schemes. An optimal erbium absorption coefficient which minimizes the required pump power is found. However, this case corresponds to the highest amplifier noise figure. The authors conclude that, in practice, distributed erbium-doped fiber amplifiers are not significantly advantageous compared to 980-nm-pumped lumped amplifier schemes.<>
Keywords :
erbium; fibre lasers; noise; optical losses; optical pumping; transparency; 1.48 micron; ASE noise; amplified spontaneous emission; amplifier noise figure; bidirectional pumping; distributed Er doped fibre amplifiers; distributed amplification; doping levels; fiber background loss; noise performance; optimal parameters; pump power; transparency; unidirectional pumping; unsaturated fiber amplifiers; Distributed amplifiers; Erbium; Erbium-doped fiber amplifier; Noise figure; Noise measurement; Optical fiber LAN; Optical fiber amplifiers; Optical fiber communication; Optical fiber theory; Propagation losses;
Journal_Title :
Photonics Technology Letters, IEEE
