一种新型低噪声并联CL波段掺铒光纤放大器.PDFVIP

研究与开发 一种新型低噪声并联 C+L 波段掺铒光纤放大器 1 2 张航东 ，詹黎 （1. 浙江邮电职业技术学院，浙江 绍兴 312016 ； 2. 上海交通大学物理系区域光纤通信网与新型光通信系统国家重点实验室，上海 200240 ） 摘 要：提出并论证了一种新的低噪声系数C+L 波段掺铒光纤放大器的结构。在该结构中，利用一个前置 放大器以减少噪声系数，并利用一个带有光纤布拉格光栅的双通结构以增加 L 波段增益，同时减少噪声系 数。实验结果表明，新宽带放大器的噪声系数减小了约2 dB ，并且在1 525～1 605 nm 波长范围内，增益提 高到了25 dB 以上。 关键词：掺铒光纤放大器；C 波段；L 波段；宽带 中图分类号：TN253 文献标识码：A doi: 10.11959/j.issn.1000−0801.2017133 Low noise figure C+L-band erbium-droped fiber amplifier 1 2 ZHANG Hangdong , ZHAN Li 1. Zhejiang Post and Telecommunication College, Shaoxing 312016, China 2. State Key Lab of Advanced Optical Communication Systems and Networks, Department of Physics, Shanghai JiaoTong University, Shanghai 200240, China Abstract: A new configuration of the low noise figure C+L-band erbium-doped fiber amplifier was proposed and demonstrated. In the proposed configuration, a preamplifier was used to reduce the noise figure, and an improved double-pass configuration with a fiber bragg grating was employed to enhance the L-band gain and while to reduce the noise figure. The experiment results demonstrate that the noise figure in the new broad-band amplifier was im- proved by −2 dB, and the gain was enhanced up to above 25 dB over the region from 1 525～1 605 nm. Key words: erbium-doped fiber amplifier, C-band, L-band, wideband 一。虽然拉曼光纤放大器因其具有更大的带宽， 1 引言 已取得了长足的进步和发展。然而掺铒光纤放大 为了满足通信容量的要求，宽带掺铒光纤放 器因其实用性、高可靠性及低成本等因素，仍是 大器（erbium-doped fiber amplifier，EDFA ）已经 光通信系统中的主流光纤放大器。拓展其放大带 成为了密集波分复用（dense