Temporal control of amplified femtosecond pulses with a deformable mirror in a stretcher

Abstract : We correct the spectral phases of amplified femtosecond pulses by using a deformable mirror in the stretcher. After the correction the peak intensity is multiplied by 1.5 as a consequence of increasing the contrast by 100× . The spectral phase interferometry for direct electric field reconstruction is used to characterize the pulse temporally.