DocumentCode
1545399
Title
Gain-clamped fiber amplifier with a short length of preamplification fiber
Author
Inoue, Kyo
Author_Institution
NTT Labs., Kanagawa, Japan
Volume
11
Issue
9
fYear
1999
Firstpage
1108
Lastpage
1110
Abstract
Although gain-clamping an erbium-doped fiber amplifier (EDFA) by a counterpropagating ring resonator prevents oscillation light from being output, it degrades the amplifier´s noise figure. The noise figure degradation can be reduced by using a length of EDF, that is short enough not to cause any gain saturation, for preamplification. Experiments confirm that the prestage EDFA reduces the noise figure degradation under constant gain operation.
Keywords
erbium; laser beams; laser cavity resonators; laser feedback; laser noise; optical fibre amplifiers; optical transmitters; ring lasers; wavelength division multiplexing; Er-doped fiber amplifier; constant gain operation; counterpropagating ring resonator; gain saturation; gain-clamped fiber amplifier; gain-clamping; noise figure; noise figure degradation; oscillation light; preamplification; preamplification fiber; Degradation; Erbium-doped fiber amplifier; Noise figure; Optical amplifiers; Optical feedback; Optical fiber amplifiers; Optical fibers; Optical ring resonators; Preamplifiers; Wavelength division multiplexing;
fLanguage
English
Journal_Title
Photonics Technology Letters, IEEE
Publisher
ieee
ISSN
1041-1135
Type
jour
DOI
10.1109/68.784203
Filename
784203
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