5 October 2011 Efficiency optimization of the square pulse pumped terawatt level optical parametric chirped pulse amplifier
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Abstract
Numerical simulations and analysis of a very efficient and stable non-collinear Optical Parametric Chirped Pulse Amplification (OPCPA) femtosecond system are presented. The system is optimized for a long (nanosecond), rectangular temporal profile and a flat-top spatial profile of the pump laser pulse. We show that a two stage system consisting of a multipass preamplifier and a time-sheared power amplifier operating around 850 nm and pumped by a 532 nm pulse can amplify pulses directly from a femtosecond oscillator up to multi-terawat levels with quantum efficiencies as high as 0.9. We also discuss practical schemes of the few-cycle multi-terawatt OPCPA systems employing different nonlinear crystals. The results of the Monte-Carlo simulations are used to balance the stability and efficiency of the parametric amplifier system.
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Yuriy Stepanenko, Yuriy Stepanenko, Pawel Wnuk, Pawel Wnuk, Michal Nejbauer, Michal Nejbauer, Czeslaw Radzewicz, Czeslaw Radzewicz, "Efficiency optimization of the square pulse pumped terawatt level optical parametric chirped pulse amplifier", Proc. SPIE 8187, Technologies for Optical Countermeasures VIII, 818708 (5 October 2011); doi: 10.1117/12.903732; https://doi.org/10.1117/12.903732
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