Comparison of performances between partial double-pass and full double-pass systems in two-stage L-band EDFA
Comparison of performances between partial double-pass and full double-pass systems in two-stage L-band EDFA
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DOI：
10.1002/lapl.200410116
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发表时间：
2004-08
影响因子：
1.7
通讯作者：
N. Md Samsuri;S. Harun;H. Ahmad
中科院分区：
文献类型：
--
作者：
N. Md Samsuri;S. Harun;H. Ahmad
将具有部分双通 (DP) 系统的两级 L 波段 EDFA 与全 DP 系统进行了比较。与全DP系统相比，部分DP系统在小输入信号功率下具有更高的增益和更低的噪声系数。对于部分 DP 系统，小信号增益和噪声系数分别约为 31.2 dB 和 6.2 dB。全DP系统增益的降低是由于第一级短长度掺铒光纤中常规频带放大自发辐射的双重传播，对系统造成增益钳位效应。即使与小输入信号功率下的单通两级系统相比，部分 DP 系统中的较高增益也有助于降低噪声系数。然而，在高输入信号功率下，单通系统的噪声系数最低。
The two-stage L-band EDFA with partial double-pass (DP) system is compared with the full DP system. The partial DP system has a higher gain and lower noise figure at small input signal power compared with the full DP system. The small signal gain and noise figure are obtained at about 31.2 dB and 6.2 dB, respectively, for the partial DP system. The reduction of gain in full DP system is due to the double-propagation of conventional-band amplified spontaneous emission in the short length erbium-doped fiber at the first stage that causes gain-clamping effect to the system. The higher gain in the partial DP system contributes to the lower noise figure even compared with single-pass two-stage system at small input signal powers. However, at high input signal powers, the lowest noise figure is observed for the single-pass system.