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The Characteristics of Transient Response vs. Lasing Wavelengths and Directions in Gain-Clamped L-band EDFA  

Kim Ik sang (배재대학교 정보통신공학과)
Kim Chang bong (공주대학교 정보통신공학과)
Yang Heng (배재대학교 정보통신공학과)
Sohn Young ho (영남대학교 컴퓨터공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.30, no.3A, 2005 , pp. 160-167 More about this Journal
Abstract
The gain-clamped EDFA has been developed to eliminate the output power change of WDM surviving channels to occur with added or dropped channels, which degrades the performance of WDM optical network. It maintains the constant gain of surviving channels when WDM channels are added or dropped in a network amplifying node. In this paper, the hi-directionally pumped gain-clamped EDFA is implemented to compensate the change of the input power by a lasing. The results show that the lasing of a short wavelength and backward propagation is the optimal condition to minimize the transient response of surviving channels in terms of the overshoot and gain saturation due to the inhomogeneous broadening effect.
Keywords
L-band erbium doped fiber amplifier; automatic gain control; transient response;
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