Abstract
Numerical simulations and analysis of a very efficient and stable noncollinear 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 and pumped by a pulse can achieve quantum efficiencies as high as 0.9. We also discuss practical schemes of the few-cycle multiterawatt 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.
© 2011 Optical Society of America
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