分布式光纤喇曼放大器实验研究

为了对后向抽运分布式宽带光纤喇曼放大器的特性进行实验研究,采用多波长1426nm,1440nm,1460nm,1475nm和1495nm的半导体激光器作为抽运源,实现了C+L波段近80nm带宽的信号光放大,获得了比较好的平坦增益、偏振相关增益,系统平均开关增益为10.7dB,增益平坦度为1.5dB,最大噪声指数为-1.96dB,偏振相关增益小于0.4dB。结果表明,光纤喇曼放大器的抽运源波长、功率选择比较合理,系统所有技术指标均满足光纤通信使用要求。这一结果将对通信产业化发展有着重要的指导作用。

Experiment study of distributed fiber Raman amplifiers

In order to study characteristics of a backward pumped distributed broadband fiber Raman amplifier,with multisemiconductor laser at wavelength of 1426nm,1440nm,1460nm,1475nm and 1495nm as pump source,signal amplification at bandwidth of 80nm in C+L band was realized and better gain flatness and polarization correlation were obtained.The on-off gain was 10.7dB,gain flatness was 1.5dB,and the maximum noise index was-1.96dB.Experiment results indicated that the pump wavelengths and pump power of the fiber Raman amplifier selected according to the numerical value calculation were reasonable,all technical parameters of the system satisfied requirements of the fiber communication.The resuhs will have very import guidance effect for the development of optic communications.