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Generation of 10^11 contrast 50 TW laser pulses

2006; Optica Publishing Group; Volume: 31; Issue: 10 Linguagem: Inglês

10.1364/ol.31.001456

1539-4794

V. Chvykov, Philippe Rousseau, S. Alexander Reed, G. Kalinchenko, V. Yanovsky,

Laser Material Processing Techniques

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).