CEP-controlled supercontinuum generation during filamentation with mid-infrared laser pulse
2014
With carrier-envelope phase (CEP) stabilized mid-infrared (MIR) laser pulse, the CEP-controlled supercontinuum generation can be distinctly observed in a very small distance range when the focus of the laser pulse closes to the exit surface of the fused silica (FS). This CEP effect will be gradually weakened and finally disappears if the laser focus moves out of this range. With numerical simulation, we find that although the CEP effect starts from the tunneling ionization of the electron, it can be observed only when the supercontinuum mainly comes from the self-phase modulation (SPM) and self-steepening of the laser pulse and too much electrons will make it ambiguous.
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