A compact pulse burst laser with YAG/Nd:YAG/Cr4+:YAG composite crystal

In this paper, a LD end-pumped passively Q-switched YAG/Nd:YAG/Cr4+:YAG pulse burst 1064 nm laser is demonstrated. The output performance of pulse burst laser is optimized by using different output couplers. A pulse burst with 11 pulses under the pump duration of 1 ms is obtained by using an output mirror with T = 30%. The minimum pulse width is shortened to be 1.7 ns with a pulse energy of 210 μJ. The highest peak power in YAG/Nd:YAG/Cr4+:YAG pulse burst laser is estimated to be ∼123.5 kW.