摘要
介绍了二阶DRA(分布式拉曼放大器)的结构原理和等效噪声指数,在此基础上,通过实验和理论分析研究了二阶DRA的噪声特性与一阶二阶泵浦注入比例的关系。结果表明,放大器增益基本不变时,二阶泵浦光注入比例越大,等效噪声指数越小;通过适当地调整一阶二阶泵浦功率,可使放大器工作在更小噪声条件下,使整个系统的噪声性能得以提升。
This paper introduces the structure of second-order Distributed Raman Amplifier （DRA）and the effective noise fig-ure of DRA.Based on previous work,the relationship of the second order DRA’s noise characteristic and the inj ection ratio of first order and second order pump is investigated both in experiment and theory.It is found that when the amplifier gain is ap-proximately constant,the greater the inj ection ratio of second order pump can be achieved with smaller effective noise figure. Therefore,through the appropriate adj ustment of the first order and second order pump power,it can make the amplifier work on the smaller noise condition.The noise performance of the whole system can also be improved.
出处
《光通信研究》
北大核心
2016年第5期62-64,共3页
Study on Optical Communications
关键词
二阶分布式拉曼放大器
增益
等效噪声指数
second order distributed Raman amplifier
gain
effective noise figure
