1.6 MW peak power, 90 ps all-solid-state laser from an aberration self-compensated double-passing end-pumped Nd:YVO4 rod amplifier

摘要

In this paper a delicately designed double-passing end-pumped Nd:YVO4 rod amplifier is reported that produces 10.2 W average laser output when seeded by a 6 mW Nd:YVO4 microchip laser at a repetition rate of 70 kHz with pulse duration of 90 ps. A pulse peak power of similar to 1.6 MW and pulse energy of similar to 143 mu J is achieved. The beam quality is well preserved by a double-passing configuration for spherical-aberration compensation. The laser-beam size in the amplifier is optimized to prevent the unwanted damage from the high pulse peak-power density. This study provides a simple and robust picosecond all-solid-state master oscillator power amplifier system with both high peak power and high beam quality, which shows great potential in the micromachining. (C) 2016 Optical Society of America