前向多泵浦拉曼放大器中噪声的精确分析  

Accurate analysis of noise in the forward multi-pump Raman amplifier

作　　者：巩稼民 郝倩文 张丽红 张晨 王杰 刘爱萍 马豆豆 GONG Jia-min;HAO Qian-wen;ZHANG Li-hong;ZHANG Chen;WANG Jie;LIU Ai-ping;MA Dou-dou(School of Communication and Information Engineering,Xi′an University of Posts and Telecommunications,Xi′an 710121,China)

机构地区：[1]西安邮电大学通信与信息工程学院,陕西西安710121

出　　处：《激光与红外》2020年第10期1241-1245,共5页Laser & Infrared

基　　金：国家自然科学基金项目(No.61775180)资助。

摘　　要：ASE噪声和DRBS噪声是影响拉曼光纤放大器传输性能的两个重要因素。本文运用四阶龙格-库塔法对多泵浦RFA的噪声功率进行仿真,进一步得到ASE和DRBS噪声的信噪比和噪声系数。结果表明,当光纤长度L<30 km时,ASE噪声对系统影响较大,而L>40 km时,DRBS噪声是影响系统性能的主要因素。另外,长波长的噪声比短波长信道的噪声功率更高,对系统的影响更大。当信号光波长相差24 nm时,长波长的ASE噪声饱和值至少比短波长高0.005 mW,DRBS噪声饱和值至少比短波长高0.0025 mW。ASE noise and DRBS noise are two important factors that affect the transmission performance of Raman fiber amplifiers.In this paper,the fourth-order Runge-Kutta method is used to simulate the noise power of multi-pump RFA,and the signal-to-noise ratio and noise factor of ASE and DRBS noise are further obtained.The results show that when the fiber length is smaller than 30 km,the ASE noise has a great influence on the system,while the DRBS noise is the main factor affecting the system performance when the fiber length is larger than 40 km.In addition,the noise power of the long wavelength is larger than that of the short wavelength,so has a larger effect on the system.When the wavelength difference between signals is 24 nm,the ASE noise saturation value of long wavelength is at least 0.005mw higher than that of short wavelength,and the noise saturation value of DRBS is at least 0.0025 mW higher than that of short wavelength.

关 键 词：多泵浦拉曼光纤放大器 ASE噪声 DRBS噪声 四阶龙格-库塔法 

分 类 号：TN929.11[电子电信—通信与信息系统]