Title :
Gain clamping in L-band erbium-doped fiber amplifier using a fiber Bragg grating
Author :
Harun, S.W. ; Low, S.K. ; Poopalan, P. ; Ahmad, H.
Author_Institution :
Dept. of Phys., Malaya Univ., Kuala Lumpur, Malaysia
fDate :
3/1/2002 12:00:00 AM
Abstract :
A gain-clamping technique for the long wavelength band (L-band) erbium-doped fiber amplifier (EDFA) is presented. It uses a single fiber Bragg grating (FBG) on the input side of erbium-doped fiber (EDF) to inject a portion of backward conventional band (C-band) amplified spontaneous emission (ASE) back into the system. The use of a narrow-band (NB) FBG has shown a better performance in clamped-gain level and noise figure compared to a broad-band FBG. The amplifier gain for the NB FBG set up is clamped at 15.4 dB with a variation of less than 0.3 dB for an input power as high as 0 dBm.
Keywords :
Bragg gratings; erbium; optical fibre amplifiers; superradiance; 15.4 dB; EDFA; L-band erbium-doped fiber amplifier; amplifier gain; backward C-band amplified spontaneous emission; clamped-gain level; conventional band; fiber Bragg grating; gain-clamping; input side; long wavelength band; narrow-band FBG; noise figure; single fiber Bragg grating; Bragg gratings; Clamps; Erbium-doped fiber amplifier; Fiber gratings; High power amplifiers; L-band; Narrowband; Niobium; Noise figure; Spontaneous emission;
Journal_Title :
Photonics Technology Letters, IEEE
