178-W picosecond green laser with active beam-pointing stabilization

Picosecond lasers with high average power and beam quality have been widely used for precision processing space exploration. In this study, we report a high-power picosecond green laser using multistage Yb-doped rod-shaped photonic crystal fiber as an amplifier combined combination. The single amplification module achieves 1,030 nm output of 146.8 W, the maximum second harmonic generation (SHG) is 92 W frequency conversion efficiency 63.5%. two SHGs resulted in final 178 repetition 24.07 MHz, pulse width 50.1 ps, factor M 2 = 1.16. Furthermore, adaptive filter control method two-axis fast-steering mirror was applied to suppress jitter up 45 Hz.