被动锁模光纤激光器多孤子脉冲形成机理

基于非线性耦合薛定谔方程,在非线性偏振技术锁模的掺铒环形光纤激光器中,理论研究多孤子脉冲的形成和演化规律。研究结果表明：随着小信号增益不断增加,光纤激光器的锁模透过率函数影响多脉冲输出，多脉冲产生受色散波和脉冲分裂形成的峰值功率的限制效应和孤子能量量子化的影响，这是增益竞争和非线性偏振旋转引起的损耗之间动态平衡的最终结果。

Mechanism of multiple-soliton formation in passively mode-locked fiber lasers

Based on the coupled complex nonlinear Schrodinger equations, the evolvement of the multi-pulse trains is numerically investigated in erbium-doped fiber ring mode-locked laser using the nonlinear polarization rotation technique. The results show that the transmittance function of the mode-locked fiber ring laser can affect the output of multi-pulsing with the small signal gain increasing. The formation of the multiple-soliton is the result of the peak-power-clamping effects, such as the dispersive waves and pulse-splitting and the soliton energy quantization. It is the dynamic balance between the gain competition and the loss caused by the nonlinear polarization evolvement.