Title :
Amplified spontaneous emission in cladding-pumped L-band erbium-doped fiber amplifiers
Author :
Söderlund, M. ; Tammela, S. ; Pöyhönen, P. ; Leppihalme, M. ; Peyghambarian, N.
Author_Institution :
Microsyst. Group, VTT Electron., Finland
Abstract :
Propagation of amplified spontaneous emission (ASE) in cladding-pumped long-wavelength-band erbium-doped fiber amplifiers (EDFAs) is analyzed numerically. Forward and backward ASE power dependence on cladding area is analyzed for both pumping directions. ASE power propagating counterdirectionally to the pump is found to experience strong dependence on the cladding area. Increasing the cladding area results in more uniform pump distribution along the EDF, preventing short-wavelength gain and ASE buildup. Quantum conversion efficiency in cladding-pumped L-band EDFAs is discussed.
Keywords :
erbium; laser beams; laser noise; laser theory; optical fibre amplifiers; optical fibre cladding; optical pumping; superradiance; ASE buildup; Er-doped fiber amplifiers; amplified spontaneous emission; backward amplified spontaneous emission power dependence; cladding area; cladding-pumped L-band Er-doped fiber amplifiers; cladding-pumped long-wavelength-band Er-doped fiber amplifiers; forward amplified spontaneous emission power dependence; pumping directions; quantum conversion efficiency; short-wavelength gain; uniform pump distribution; Erbium-doped fiber amplifier; L-band; Laser excitation; Laser noise; Optical amplifiers; Power amplifiers; Power generation; Power lasers; Pump lasers; Spontaneous emission;
Journal_Title :
Photonics Technology Letters, IEEE
