双折射光纤中斯托克斯波的增益谱

Gain of stokes in birefringence fiber

根据激光脉冲在双折射光纤中传输时的混合模方程,考虑拉曼效应后,得出在受激拉曼散射和参量放大共同作用下的增益.数值模拟了当输入泵浦波沿两双折射轴45°附近区域传输时,在不同色散区斯托克斯增益谱随输入功率及群速度失配等相关参数的变化关系;结果表明斯托克斯增益谱在不同色散区表现出明显不同的特性,当满足一定条件下,可利用混合模双折射光纤中传输的泵浦波分解出的脉冲序列来分离和提取T频脉冲.

The coherently coupled nonlinear Schr6dinger （NLS） equation of the propagation of a light pulse in birefringence fiber has been utilized. The gain have been obtained that combining Parametric Amplification and Raman scattering after take into account Raman effect. The gain as a function of input pumppower and the group velocity mismatch etal interrelated Parameter have been numerical simulated when the pump wave polarization orientation at the birefringent axes 45° region in different dispersion regime. The results show that gain spectrum Stokes obviously vary in different dispersion regime. The input pump waveean be changed into pulse array under certain conditions, So that we can extract super- short pulses fromit.