用腔内半导体可饱和吸收镜钛宝石激光器中自锁模状态的实验研究

摘要

用可饱和吸收体镜(SESAM)的掺钛蓝宝石激光器能够稳定运转在三种不同的锁模状态，即可饱和吸收体被动锁模、孤子锁模加被动锁模和KLM锁模.分析了三种自锁模的机理和SESAM的作用.对SESAM实现KLM锁模的自启动机制进行了实验观察和讨论.从该激光器的KLM锁模状态，获得了小于18飞秒的锁模脉冲序列.%The self-mode-locking states in a Ti:sapphire laser using an intracavity semiconductor saturable absorber mirror(SESAM) have been investigated experimentally.In this laser,three mode-locking states,i.e.the passive mode-locking with a saturable absorber,the soliton mode-locking and the Kerr-lens mode-locking have been demonstrated.As short as sub-18-fs pulses were produced from the Kerr-lens mode-locking in the laser.The mode-locking mechanism and the role of SESAM as well as the self-starting dynamics of SESAM have been investigated and discussed.