Journal
OPTICS LETTERS
Volume 38, Issue 5, Pages 718-720Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.38.000718
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Funding
- European commission's (EC) 7th Framework Programme (LASERLAB-EUROPE) [228334]
- Bundesministerium fur Bildung und Forschung (BMBF) [03ZIK445, 03Z1H531]
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We report on the first generation of high-contrast, 164 fs duration pulses from the laser system POLARIS reaching focused peak intensities in excess of 2 x 10(20) W/cm(2). To our knowledge, this is the highest peak intensity reported so far that has been achieved with a diode-pumped, solid-state laser. Several passive contrast enhancement techniques have been specially developed and implemented, achieving a relative prepulse intensity smaller than 10(-8) at t = -30 ps before the main pulse. Furthermore a closed-loop adaptive-optics system has been installed. Together with angular chirp compensation, this method has led to a significant reduction of the focal spot size and an increase of the peak intensity. (c) 2013 Optical Society of America
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