On further increasing the pump power,the coupling between SRS and parametric four-wave mixing will result in the appearance of waves with new wavelengths,and the spectrum will become broader and more smooth.

• 抽运功率进一步增加时；受激拉曼散射、参量四波混频等非线性的共同作用将使光谱进一步加宽且变得光滑.