Title :
Amplified spontaneous emission and Rayleigh backscattering in strongly pumped fiber amplifiers
Author :
Hardy, Amos A. ; Oron, Ram
Author_Institution :
Dept. of Electr. Eng., Tel Aviv Univ., Israel
fDate :
10/1/1998 12:00:00 AM
Abstract :
Amplified spontaneous emission (ASE) and Rayleigh backscattering (RBS) in strongly pumped fiber amplifiers are studied, employing a rate equation model. Approximate expressions for the ASE and RES, as well as for the amplifier noise figure are derived, based on approximate analytical expressions for the amplified signal, which are valid for both three-level and four-level systems. Numerical examples for rare-earth-doped fibers, show good agreement between these approximate expressions and the exact numerical solutions for strong pumping and for injected signals which are not too weak
Keywords :
Rayleigh scattering; approximation theory; backscatter; fibre lasers; laser noise; laser theory; optical pumping; superradiance; Rayleigh backscattering; amplified signal; amplified spontaneous emission; amplifier noise figure; approximate analytical expressions; exact numerical solutions; four-level systems; injected signals; rare-earth-doped fibers; rate equation model; strong pumping; strongly pumped fiber amplifiers; three-level systems; Backscatter; Doped fiber amplifiers; Noise figure; Optical amplifiers; Optical fiber amplifiers; Optical fiber communication; Optical fiber sensors; Optical fibers; Signal analysis; Spontaneous emission;
Journal_Title :
Lightwave Technology, Journal of
