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The application of the chirped pulse amplification technique to Ti:sapphire has made possible the generation of energetic sub-100 fs pulses. Sub- 20 fs Ti:Sapphire oscillators are now available, and amplification of pulses shorter than 40 fs has been demonstrated [1,2]. Although these pulses have very high peak power they can be useful to high field physics and specially to solid-state target experiments, only if they are free of any prepulse or wing. We describe here a Ti:sapphire amplifier which has been designed to produce pedestal free, 20TW,40fs pulses at 10 Hz. In order to minimize prepulses, we designed the amplifier with a broad transmission bandwidth, minimum material path length, high gain, and introduced an aberration free system for stretching and recompressing the pulses [3].
© 1996 Optical Society of America
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