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Opt Lett. 2006 May 15;31(10):1456-8.

Generation of 10(11) contrast 50 TW laser pulses.

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  • 1Center for Ultrafast Optical Sciences, University of Michigan, Ann Arbor 48109-2099, USA.


We demonstrate what we believe to be the highest-contrast (10(11)), multiterawatt, chirped-pulse amplification (CPA) Ti:sapphire laser by applying the modified cross-polarized-wave (XPW) generation method. This method produces a contrast improvement of 3 orders of magnitude using microjoule input energy. Microjoule energy can be achieved by direct amplification without the complications of a double CPA system. The 10(11) contrast is sufficient for experiments on high-damage-threshold solid targets with focused intensities up to 10(22) W/cm(2).

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