Title :
Low-noise intelligent cladding-pumped L-band EDFA
Author :
Ylä-Jarkko, K.H. ; Codemard, C. ; Singleton, J. ; Turner, P.W. ; Godfrey, I. ; Alam, S.-U. ; Nilsson, J. ; Sahu, J.K. ; Grudini, A.B.
Author_Institution :
Southampton Photonics Inc., UK
fDate :
7/1/2003 12:00:00 AM
Abstract :
We present results on a low-cost cladding-pumped L-band amplifier based on side pumping (GTWave) fiber technology and pumped by a single 980-nm multimode diode. We show that simultaneous noise reduction and transient suppression can be achieved by using gain clamping by a seed signal (/spl lambda/=1564 nm). In the gain-clamping regime, the amplifier exhibits 30-dB gain over 1570-1605-nm spectral band with noise figure below 7 dB. The noise figure can be further reduced to below 5 dB by utilizing a low power single-mode pump at 980 nm. The erbium-doped fiber amplifier is relatively insensitive to input signal variations with power excursions below 0.15 dB for a 10-dB channel add-drop.
Keywords :
erbium; laser noise; optical communication equipment; optical fibre amplifiers; optical fibre cladding; optical pumping; transients; 1564 nm; 1570 to 1605 nm; 980 nm; channel add-drop; erbium-doped fiber amplifier; gain clamping; gain-clamping regime; input signal variations; low power single-mode pump; low-cost cladding-pumped L-band fibre amplifier; low-noise intelligent cladding-pumped L-band EDFA; multimode diode; noise figure; power excursions; seed signal; simultaneous noise reduction; spectral band; transient suppression; Clamps; Diodes; Erbium-doped fiber amplifier; L-band; Noise figure; Optical fiber amplifiers; Optical fiber communication; Optical fibers; Stimulated emission; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2003.813433
