Abstract
Experiments were carried out with a table top terawatt laser system which employs the chirped pulse amplification technique [1]. The laser was delivering up to 2 J on targets in a 400 fs pulse at the wavelength of 1.053 μm. High contrast pulses have been obtained by frequency doubling (0.53 μm) the laser pulse using KDP crystals. Very high conversion efficiencies have been obtained [2] and the pulses have been focused with off axis parabola to intensities up to 4 x 1018 W/cm2 (Iλ2 = 1018 W μm2/cm2 for green irradiation). At these intensities relativistic effects and ponderomotive pressure [3] are important issues for the interaction.
© 1994 Optical Society of America
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