Gain enhancement in gain-shifted erbium-doped fiber amplifiers for WDM applications

被引：12
|
作者：
Karásek, M [1 ]
机构：
[1] Univ Laval, Ctr Opt Photon & Laser, Dept Elect & Comp Engn, Quebec City, PQ G1K 7P4, Canada
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 1999年 / 11卷 / 09期
关键词：
erbium-doped fiber amplifiers; optical fiber communication; wavelength-division multiplexing;
D O I：
10.1109/68.784205
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Utilization of amplified spontaneous emission (ASE) for gain enhancement in gain-shifted erbium-doped fiber amplifier (GS-EDFA) is analyzed. It is shown that in a multiwavelength regime, gain enhancement as high as 5 dB can be achieved when the counterpropagating ASE is used to invert an unpumped first stage of a two-stage GS-EDFA, We present design criteria for flat gain operation and noise penalty minimization of two-stage GS-EDFA's determined for multiwavelength operation in the 1580-nm wavelength band. The analysis is based on an application of a comprehensive large-signal numerical model which takes into consideration propagation of signal, pump and bath the downstream and upstream ASE powers.
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页码：1111 / 1113
页数：3
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