We demonstrate experimentally that the “coherent” contrast pedestal in compressed pulses from CPA lasers originates from the diffraction gratings in the pulse stretcher. The pedestal intensity correlates with the level of scatter from the gratings.
© 2011 OSA
C. Hooker, Y. Tang, O. Chekhlov, J. L. Collier, E. Divall, K. Ertel, S. Hawkes, and R. Pattathil, "Origin of the Coherent Contrast Pedestal in Petawatt Laser Pulses," in CLEO:2011 - Laser Applications to Photonic Applications, OSA Technical Digest (CD) (Optical Society of America, 2011), paper CTuJ6.
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