多泵浦与光纤级联结合的宽带拉曼光纤放大器

针对传统光纤通信传输系统中拉曼光纤放大器(RFA)增益带宽不足、输出增益低且输出增益不平坦的问题,设计了一种多泵浦和光纤级联相结合的宽带拉曼光纤放大器。并且推导实现增益平坦输出时所用六个泵浦光和四段光子晶体光纤(PCF)对应参数满足的约束表达式,从理论上给出了一种提高放大器增益和增益带宽的同时保证较小增益平坦度的设计方法。最后通过Matlab数值模拟,所设计的宽带拉曼光纤放大器达到了增益带宽92 nm,平均增益39.95 dB,增益平坦度0.1447 dB。

Wideband Raman fiber amplifier combining multi-pumped and fiber cascaded

In order to solve the problems of insufficient gain bandwidth,low output gain and unflat gain of Raman fiber amplifier (RFA) in traditional optical fiber communication transmission system,a wideband Raman fiber amplifier combining multi-pump and fiber cascade is designed.The constrained expressions of the six pump light parameters and the length of the four-stage photonic crystal fiber (PCF) used to achieve the gain flat output are derived.In theory,a design method is proposed to improve the bandwidth and gain of the amplifier while ensuring the small gain flatness.Finally,through numerical simulation by Matlab,the gain bandwidth of the designed wideband RFA is 92 nm,the average gain is 39.95 dB and the gain flatness is 0.1447 dB.