Base on the principle of Kerr lens mode locking and the fact that the coupling between the laser and pump in the crystal varies with the power, the absorber-like equation is derived.

• 从钛宝石激光器的克尔透镜锁模原理出发,基于晶体内激光和泵浦激光耦合情况随腔内功率变化这一事实,给出了克尔透镜锁模过程中类可饱和吸收体的表达式;