本文采用波长为1 455nm的大功率光纤拉曼激光器(FRL)作为泵浦源,啁啾布拉格光纤光栅作为增益平坦滤波器,用两种不同的光源组合作为信号源(宽带ASE光源)+波分复用模拟器(WDM-emulator)以及四通道外腔可谐调式激光器(ECL)+滤波器型波分复用器(FWDM))对光纤拉曼放大器的增益平坦化特性进行实验研究,获得了平坦增益带宽为55nm(1 519～1 574nm),平均开关增益大小为15.2dB,增益不平坦度为±0.8dBd的宽带光纤拉曼放大器。通过实验研究表明,该方案为带宽低于60nm的光纤拉曼放大器的增益平坦化设计提供了一种新的选择。

The experimental study of gain flattening dispersion compensation wide-band Fiber Raman Amplifier (RFA) was presented by using 1445nm high power Fiber Raman Laser (FRA) as pump and two different source combinations as signals.One used broadband ASE light source and WDM-emulator as Dense Wavelength Division Multiplexing (DWDM) signal source,and the other used four-channel External Cavity Laser (ECL) and filter type Wavelength Division Multiplexer (FWDM) as signal source.Moreover,Chirped Fiber Bragg Grating (CFBG) as gain flattening filter was designed to flatten actually tested gain spectra.Wide-band FRA with bandwidth from 1519nm to 1574nm (55 nm) was successfully obtained.Its average gain and gain ripple could reach 15.2dB and ±0.8dB respectively.It provides a new solution for wideband FRA design within 60nm.