Abstract

We demonstrate an optical parametric chirped-pulse amplification (OPCPA) system with the pulse energy of 1.5mJ at a 1kHz repetition rate. The newly developed 100ps Ti:sapphire pump laser system, which was optically synchronized with OPCPA seed pulses, delivered 10mJ, 400nm pump pulses. After three-stage parametric amplification, recompression of the amplifier output from 45psto6.4fs was performed. The pulse width of 6.4fs is, to our knowledge, the shortest ever obtained by OPCPA, and the average power of 1.5W (1.5mJ,1kHz) is believed to be the highest among few-cycle OPCPA systems.

© 2007 Optical Society of America

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