Title :
Gain enhancement in L-band EDFA through a double-pass technique
Author :
Harun, S.W. ; Poopalan, P. ; Ahmad, H.
Author_Institution :
Dept. of Phys., Malaya Univ., Kuala Lumpur, Malaysia
fDate :
3/1/2002 12:00:00 AM
Abstract :
An improvement of gain in the long-wavelength band (L-band) is observed by double passing the forward amplified spontaneous emission and signal in the erbium-doped fiber (EDF) using a circulator, unlike conventional single pass amplification. A gain enhancement as high as 11 dB is obtained for a 1570-nm signal with an input power of -20 dBm at 98 mW of pump power. However, a noise figure penalty of about 2 dB is observed.
Keywords :
erbium; laser noise; optical circulators; optical fibre amplifiers; optical pumping; superradiance; 11 dB; 1570 nm; 2 dB; 98 mW; L-band EDFA; circulator; double-pass technique; erbium-doped fiber; forward amplified spontaneous emission; gain enhancement; input power; long-wavelength band; noise figure penalty; pump power; Bandwidth; Erbium-doped fiber amplifier; High speed optical techniques; L-band; Noise figure; Optical fibers; Optical noise; Optical pumping; Spontaneous emission; Stimulated emission;
Journal_Title :
Photonics Technology Letters, IEEE
