Patent ID: 8774240

Claim:
A chirped pulse amplification device amplifying a laser pulse of laser light comprising: a stretcher time-stretching laser pulse incident on the stretcher and producing a stretched laser pulse; two serially arranged amplifying media amplifying the stretched laser pulse and producing an amplified stretched laser pulse; a main compressor time-compressing the amplified stretched laser pulse and producing an output laser pulse of the amplification device, the output laser pulse having a desired duration; and a first adjustment compressor adjusting duration of the stretched laser pulse to a duration longer than the desired duration of the output laser pulse and correcting time aberrations of the stretched laser pulse, wherein the first adjustment compressor is located between the stretcher and the main compressor and between the two amplifying media, and the first adjustment compressor includes at least two movable diffraction gratings that are movable into positions correcting the time aberrations of the stretched laser pulse.