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采用有限差分方法对双波长飞秒激光器的锁模方程进行了数值分析， 得到了不同参数下交叉锁模脉冲的数值解。结果表明， 在双光束谐振腔内， 由于自相位调制、群速色散、交叉耦合、增益放大以及损耗调制的作用， 在一定条件下， 激光器能够从连续运转状态发展到锁模状态， 并产生双波长飞秒交叉锁模脉冲
The finite-difference method is used to analyze the mode-locking equations of the dual-wavelength femtosecond laser. The numerical solutions of cross-mode-locked pulses under different parameters are obtained. The results show that under certain conditions, the laser can develop from the continuous operation state to the mode-locked state due to the self-phase modulation, the group velocity dispersion, the cross-coupling, the gain amplification and the loss modulation, Wavelength femtosecond cross-mode-locked pulse