Abstract
There is considerable interest in the development of multiterawatt excimer lasers for applications of an extremely high intensity optical field to multiphoton processes and the XUV laser. A 4-TW peak power was obtained with a 1.5-J output energy in 390 fs from an election beam pumped amplifier.1 More recently a new 10-Hz terawatt system using gated gain amplification has been developed. An output energy of 400 mJ in 280 fs was achieved by two beams. The output beam was focused to a spot size of 2 × 2μm2 by an off-axis parabolic mirror with a 12.5-cm focal length. The twenty-third harmonic of a KrF laser was generated in He arid Ne gas jets using this system.
© 1990 Optical Society of America
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