摘要
在同时考虑抽运光和信号光之间不同偏振态、多波长抽运以及抽运光和信号光损耗系数不同的情况下 ,导出了分布光纤拉曼放大器 (DFRA)的等效噪声系数解析公式 ,并据此定量研究了抽运光和信号光之间的偏振关系对DFRA特性的影响以及DFRA与掺铒光纤放大器 (EDFA)级联时系统光信噪比 (OSNR)的改善ΔOSNR。指出 :随着DFRA开关增益的增加 ,ΔOSNR会由线性增加逐渐变为对数增加而趋于饱和。
Analytical expressions of equivalent noise figure and other noise characteristics of distributed fiber Raman amplifier (DFRA) are derived under complex conditions. These conditions include difference in polarization state and attenuation coefficients between pump and signal light as well as multiple wavelength pumping. Accordingly, their impact on DFRA performance and optical signal to noise ratio improvement (ΔOSNR) of concatenated DFRA+EDFA is investigated. With increasing DFRA on off gain, ΔOSNR increases first linearly and then logarithmically, resulting in saturation. Results of this work agree well with numerical simulation of existing work.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2002年第7期635-638,共4页
Chinese Journal of Lasers
关键词
分布光纤拉曼放大器
等效噪声系数
光信噪比
掺铒光纤放大器
光通信
distributed fiber Raman amplifier (DFRA), equivalent noise figure, optical signal to noise ratio (OSNR), erbium doped fiber amplifier (EDFA)
