PW-class Laser Operation at 3.3 Hz and High Contrast Ultra-intense λ=400 nm Beamline

We demonstrated 0.85PW, 30fs pulses at a repetition rate of 3.3Hz from a Ti:Sapphire laser. Ultra-high contrast λ=400 nm fs pulses were generated with > 40% efficiency and focused to an intensity of 6.5×10 21 W/cm 2 .