Abstract
Efficiency and fidelity of chirped pulse amplification are limited primarily by; (1) control of higher order phase distortion and (2) gain narrowing during amplification, We have addressed these problems with an optimized, quintic-phase-limited expander and compressor design and regenerative pulse shaping. In this paper, we present results of a three-stage amplification system that is designed to produce >1 J pulses of ~15 fs in duration. To date, the first two stages of amplification have produced 18-fs, 4 TW pulses at a repetition rate of 50 Hz and an average power >4 W. To our knowledge, these intermediate results represent the shortest terawatt pulses, the highest expansion ratio (>100,000 times) and the highest average power yet produced by any chirped pulse amplification system.
© 1996 Optical Society of America
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