Abstract:Spectral broadening and compression of a sub-terawatt (TW) laser pulse can be achieved by tightly focusing the pulse into a thin, dense gas target; in this way, the excited plasma wave drives self-phase modulation in the pulse and causes a coupled spatial-temporal evolution of field envelope. Through three-dimensional particle-in-cell simulations, selected focal positions of incident pulse, gas species, and target peak densities are assigned to investigate the performance of pulse compression. When a 0.25-TW, … Show more
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