Enhancement of pump conversion efficiency in preamplified L-band erbium-doped fiber amplifiers

被引：2
作者：
Hung, CY [1 ]
Wang, LK [1 ]
机构：
[1] Natl Tsing Hua Univ, Inst Photon Technol, Hisnchu 300, Taiwan
来源：
OPTICS COMMUNICATIONS | 2006年 / 259卷 / 02期
关键词：
L-band erbium-doped fiber amplifiers; preamplifier; backward ASE; pump conversion efficiency;
D O I：
10.1016/j.optcom.2005.09.036
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A new configuration of L-band erbium-doped fiber amplifiers (EDFAs) is presented here. The system contains a double-pass L-band EDFA and an optical preamplifier. Different from conventional preamplified double-pass L-band EDFA systems in which only the forward ASE of the preamplifier is re-used as an auxiliary pump, the new system recycles the backward ASE of the preamplifier as well. Two kinds of main L-band EDFAs are studied, both of which include a section of un-pumped erbium-doped fiber placed in a loop reflector. An improvement of up to 110% in pump conversion efficiency is demonstrated with the proposed recycling of the backward ASE, with respect to the system without recycling. (C) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：670 / 675
页数：6
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