In this study, gain clamping performance in an L-band zirconium-erbium co-doped fiber amplifier (Zr-EDFA) with a very short length of heavily doped fiber and FBG based lasing control structure was presented. A simple gain clamping design based on a symmetrical narrow band C-band fiber Bragg grating (FBG) pair addition was used in the L-band Zr-EDFA with bidirectionally pumping scheme. An L-band gain of higher than 25 dB was obtained with a maximum noise figure (NF) of 5 dB in the conventional Zr-EDFA design which was higher than the previous results obtained with forward pumping scheme. When a couple of narrow band FBGs at Bragg reflection wavelength of 1542 nm are used as the lasing mechanism for gain clamping in L-band operation, small signal gain of Zr-EDFA decreases, but on the other hand, the gain is clamped at almost 15.5 dB with a flattened gain spectrum along a dynamic range of 25 dB for the signal input powers between −30 and −5 dBm with the expense of 1.5 dB NF penalty.

中文翻译：

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基于 FBG 激光控制的 L 波段锆铒共掺杂光纤放大器中的增益钳位

在这项研究中，介绍了具有极短重掺杂光纤长度和基于 FBG 的激光控制结构的 L 波段锆铒共掺杂光纤放大器 (Zr-EDFA) 的增益钳位性能。基于对称窄带 C 波段光纤布拉格光栅 (FBG) 对添加的简单增益钳位设计用于具有双向泵浦方案的 L 波段 Zr-EDFA。在传统的 Zr-EDFA 设计中，L 波段增益高于 25 dB，最大噪声系数 (NF) 为 5 dB，高于前向泵浦方案获得的先前结果。当一对 1542 nm 布拉格反射波长的窄带 FBG 用作 L 波段操作中增益钳位的激光机制时，Zr-EDFA 的小信号增益会降低，但另一方面，增益几乎被钳位在15.