多波长泵浦宽带拉曼放大器功率增益研究

受激拉曼散射（SRS）的Stokes波谱线型比较复杂，本文分别用Gauss线型和Lorentz线型，研究多波长泵浦宽带Raman放大器的增益特性，提出宽带增益平坦的多波长泵浦方案，研究表明增益平坦程序与泵清波频率间隔密切相关。对G．652、G．653、G．655光纤和新型大有效面积非零色散平坦光纤的Raman放大增益分别进行了研究，结果表明Raman增益与光纤种类和光纤传输性有关，特别是随光纤有效纤芯面积的增大而明显减小。

Investigating the gain of multi-pumping broadband Raman amplifier

The Stokes spectrum in the stimulated Raman scattering (SRS) is very complicate. In this article, we use both Gaussian and Lorentz approximation to investigate the gain properties of multi- pumping broadband Raman amplifier, and present some schemes for flattening the gain. All the results show that the flatness of the gain spectrum is closely related to the pumping frequency ghd. Researching the Raman amplifiers based on G.652, G.653, G.655 fiber and laree effechve area non-zero dispersion fiattening fiber, we got that the Raman gain is associated with the fiber type and its transmission properties, especially decreasing with the effective core area increasing.