Abstract
The picosecond optical parametric chirped pulse amplifier (ps-OPCPA) with double BBO arrangement can support the ultrabroad spectrum even under a relatively long pump pulse duration (∼100 ps). In this work, five-wave-coupled equations taking into consideration different phase matching conditions between the parametric superfluorescence (PSF) and the signal are proposed to investigate the temporal contrast in ps-OPCPA schemes. Both the temporal contrast and the amplified spectrum are numerically analyzed in double BBO arrangements with four phase matching conditions. Numerical results show that the high temporal contrast and ultrabroad spectrum can be simultaneously realized by choosing the proper phase matching geometry in a double BBO arrangement. The numerical investigation here relaxes the requirement of very short pump pulses in ps-OPCPA, which can provide beneficial guidance for the design and construction of ps-OPCPA.
Highlights
IntroductionPublisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations
Motivated by the promising applications of intense few-cycle laser pulses with high temporal contrast, we are devoted to studying the ps-OPCPA schemes
It is found that the amplified energy of parametric superfluorescence (PSF) with perfect phase-matching is little higher than the case of PSF having the same phase mismatch with the signal
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Optical parametric chirped pulse amplifiers pumped by picosecond pulses (ps-OPCPA). Have provided effective approaches for generating intense few-cycle laser pulses, which can be widely applied to investigations of high-order harmonic generation (HHG) [1,2,3]
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