Prasankumar R, Hirakawa Y, Kowalevicz A, Kaertner F, Fujimoto James, Knox W
Opt Express. 2003 Jun 2;11(11):1265-9. doi: 10.1364/oe.11.001265.
We describe an extended cavity femtosecond Cr:LiSAF laser pumped by inexpensive single spatial mode diodes. Using a multi-pass cavity (MPC) to lower the repetition rate and a saturable Bragg reflector (SBR) for mode-locking, pulse energies of 0.75 nJ at a repetition rate of 8.6 MHz are achieved with durations of 39 fs and bandwidths of 20 nm in a prismless configuration. Pulse energies of 0.66 nJ at a repetition rate of 8.4 MHz with durations of 43 fs and bandwidths of 18.5 nm are generated using prisms for dispersion compensation. This laser offers performance approaching that of standard Ti:sapphire lasers at a fraction of the cost.
我们描述了一种由廉价的单空间模式二极管泵浦的扩展腔飞秒Cr:LiSAF激光器。利用多程腔（MPC）降低重复频率，并采用可饱和布拉格反射镜（SBR）进行锁模，在无棱镜配置下，重复频率为8.6 MHz时实现了0.75 nJ的脉冲能量，脉冲持续时间为39 fs，带宽为20 nm。使用棱镜进行色散补偿时，在重复频率为8.4 MHz时产生了0.66 nJ的脉冲能量，脉冲持续时间为43 fs，带宽为18.5 nm。该激光器以较低的成本提供了接近标准钛宝石激光器的性能。
