1  kHz, 96  W pulse-burst picosecond laser system with six equal spacing and amplitude pulses

An average power of 96 W pulse-bursts picosecond laser system at a pulse repetition frequency of 1 kHz was reported with six pulses in bursts. Pulses in bursts have equal spacing and amplitude; spacing between each pulse was 800 ps, which repetition rate was up to gigahertz. The beam quality of M² factor was less than 3, and pulse width was 50 ps. Pulses from a Nd:YVO₄ mode-locked laser were broadened to 115 ps by a volume-Bragg grating and each pulse was divided into six pulses by beam splitter mirrors to obtain seed bursts. A Nd:YAG regenerative amplifier and two stages of single passed high gain Nd:YAG amplifier with serrated aperture were applied to achieve high power.