绿光半导体激光器直接抽运的钛宝石飞秒脉冲

Ti:Sapphire Femtosecond Pulses Pumped Directly by Green Diode Lasers

对两个1.45 W/520nm绿光半导体激光器的输出光束进行整形,再将其聚焦到钛宝石激光晶体上进行抽运,并结合GTI(Gires-Tournois Interferometer)镜对腔内色散给予补偿,实现了稳定的克尔透镜锁模运转,输出脉冲激光的脉宽为91fs,输出功率为208 mW,输出单脉冲能量为1.59nJ;优化腔型参数后,获得的最窄脉宽为82fs;缩短腔长后,获得的最高输出功率为232mW。

The laser beams emitted from a pair of 520 nm/1.45 W green diode lasers are shaped and focused on a Ti： sapphire laser crystal to complete the pumping process. The intracavity dispersion is compensated by using the GTI （Gires-Tournois interferometer） mirrors. The stable Kerr-lens mode locking state is achieved with an output pulse width of 91 fs, an output power of 208 mW, and a single pulse energy of 1.59 nJ. The narrowest pulse width of 82 fs is further realized after the optimization of cavity-type parameters and the maximum output power reaches 232 mW when the cavity length is shortened.