Title :
Analysis of distributed erbium-doped fiber amplifiers with fiber background loss
Author_Institution :
Dept. of Electr. Eng., Columbia Univ., New York, NY, USA
fDate :
7/1/1991 12:00:00 AM
Abstract :
An accurate model for erbium-doped fiber amplifiers with fiber background loss applicable to the unsaturated gain regime is presented. Exact analytical solutions are derived for the output pump power, gain, and amplified spontaneous noise as a function of input pump power in the cases of unidirectional or bidirectional pumping. An exact relation is also derived between the pump threshold and the pump required for fiber transparency. Such expressions are particularly useful to model distributed fiber amplifiers and to determine the optimal fiber parameters corresponding to a given pumping scheme. As an example, the analytical solutions are used to study the pump power requirement for distributed fiber amplifiers unidirectionally pumped at 1.48 mu m, and to determine an optimum Er/sup 3+/ absorption coefficient.<>
Keywords :
erbium; fibre lasers; laser theory; light absorption; optical losses; optical pumping; 1.48 micron; Er/sup 3+/ absorption coefficient; Er/sup 3+/ fibre lasers; amplified spontaneous noise; bidirectional pumping; distributed erbium-doped fiber amplifiers; fiber background loss; fiber transparency; input pump power; laser gain; laser pumping; output pump power; pump power requirement; pump threshold; pumping scheme; unidirectional pumping; unidirectionally pumped; unsaturated gain regime; Absorption; Character recognition; Communication systems; Distributed amplifiers; Equations; Erbium; Erbium-doped fiber amplifier; Optical fiber devices; Optical fiber theory; Power amplifiers;
Journal_Title :
Photonics Technology Letters, IEEE
