Pulse-Slice Amplification and Frequency Expansion of Ti:Sapphire Laser Using Optical Parametric Effect

We propose a new method for the slice amplification and frequency expansion of a Ti:sapphire laser. A mathematical model is set up and numerically simulated on the basis of an optical parametric effect. A multiplicate mechanical laser, which can slice amplify and expand a Ti:sapphire pulse, a one nanosecond Q-switch Nd:YAG laser, pumping a narrow-bandwidth pulse Ti:sapphire tunable laser (by 532 nm) and a BBO-OPO (by 355 nm), is designed. In an experiment, the pulse-slice amplification and expansion of Ti:sapphire laser narrow linewidth (<0.1 nm), and a frequency expansion of 120 nm (560–680 nm) with an energy output of 6 times as large as that of no slice amplification are demonstrated.