【摘要】 结合特殊的谐振腔设计和半导体可饱和吸收镜,建成了一台低阈值的自启动掺钛宝石激光器.分别用3%和12%的输出耦合镜,获得了阈值低至390mW和600mW的稳定锁模脉冲输出.采用12%输出耦合镜,在1.2W抽运时,输出平均功率为114mW,对应的典型脉宽为17fs,谱宽为47nm.相对于以往的低阈值克尔透镜锁模激光器,锁模工作的范围区域加宽,减小了操作难度,提高了稳定性.更多还原

【Abstract】 A low-threshold self-starting Kerr-lens mode-locked Ti:sapphire laser was demonstrated by use of a tight focusing cavity design and a semiconductor saturable-absorber mirror (SESAM). With a 3% and a 12% output couplers, we achieved mode-locking thresholds as low as 390 and 600mW, respectively. Stable femtosecond laser pulses with average power of 114mW were generated for pump power at 1.2W, which corresponds to a typical duration of 17fs and bandwidth of 47nm. The pump power range for mode-locking covers from 600 mW to 4.8W at a 12% output coupler, and the mode-locking stability is improved.更多还原