Performance of gain-switched all-solid-state quasi-continuous-wave tunable Ti:sapphire laser system

We have made a gain-switched all-solid-state quasi-continuous-wave (QCW) tunable Ti:sapphire laser system, which is pumped by a 532\,nm intracavity frequency-doubled Nd:YAG laser. Based on the theory of gain-switching and the study on the influencing factors of the output pulse width, an effective method for obtaining high power and narrow pulse width output is proposed. Through deliberately designing the pump source and the resonator of the Ti:sapphire laser, when the repetition rate is 6\,kHz and the length of the cavity is 220\,mm, at an incident pump power of 22\,W, the tunable Ti:sapphire laser from 700 to 950\,nm can be achieved. It has a maximum average output power of 5.6\,W at 800\,nm and the pulse width of 13.2\,ns, giving an optical conversion efficiency of 25.5{\%} from the 532\,nm pump laser to the Ti:sapphire laser.