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

Volume

16

Issue

10

fYear

1998

fDate

10/1/1998 12:00:00 AM

Firstpage

1865

Lastpage

1873

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;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.721074

Filename

721074