Title :
Signal amplification in strongly pumped fiber amplifiers
Author :
Hardy, Amos ; Oron, R.
Author_Institution :
Fac. of Eng., Tel Aviv Univ., Israel
fDate :
3/1/1997 12:00:00 AM
Abstract :
Signal amplification is analyzed in strongly pumped fiber amplifiers both for three-level and four-level transitions, including scattering loss and excited state absorption. Simple analytic expressions are derived for the signal amplification and pump attenuation, along the fiber length, when either the signal and the pump are injected at the same fiber end (forward pumping) or when they are injected at the two opposite ends (backward pumping). Numerical examples for rare-earth doped fibers show excellent agreement between the analytical solution and the exact numerical solutions of the rate-equations for practical operating conditions
Keywords :
excited states; fibre lasers; laser theory; light scattering; optical fibre losses; optical pumping; rare earth metals; backward pumping; exact numerical solutions; excited state absorption; fiber length; forward pumping; four-level transitions; practical operating conditions; pump attenuation; rare-earth doped fibers; rate-equations; scattering loss; signal amplification; simple analytic expressions; strongly pumped fiber amplifiers; three-level transitions; Absorption; Doped fiber amplifiers; Equations; Erbium-doped fiber lasers; Laser modes; Optical fiber amplifiers; Optical fibers; Optical scattering; Pump lasers; Signal analysis;
Journal_Title :
Quantum Electronics, IEEE Journal of
