160W Cryogenic Regenerative Yb:YLF Amplifier

Nowadays the compact high power and high energy laser sources could be used for a variety of scientific and industrial applications as high harmonic generation, electron acceleration and material processing [1] . Although the room-temperature laser systems can provide millijoule energy at high average powers of hundreds of watts with pulse widths in the 0.5-5 ps, yet that requires to a complicated laser architecture [2] , [3] . The lasers operating at cryogenic temperatures exhibit simpler optical design together with a pristine beam quality [4] . In this work we propose as an attractive crystal choice of Yb:YLF (Yb:LiYF 4 ) for cryogenic regenerative amplifiers. Yb:YLF crystal combine adequate thermomechanical strength with a relatively broad gain bandwidth that could ideally support amplification of sub-250-fs pulses [4] .