Bulletin of the American Physical Society
63rd Annual Meeting of the APS Division of Plasma Physics
Volume 66, Number 13
Monday–Friday, November 8–12, 2021; Pittsburgh, PA
Session NP11: Poster Session V:
HED
ICF
MFE- Turbulence & Transport
9:30 AM - 12:30 PM
Wednesday, November 10, 2021
Room: Hall A
Abstract: NP11.00153 : Pump depletion in four-photon collinear laser frequency multiplication in plasma*
Presenter:
Vladimir M Malkin
(Princeton University)
Authors:
Vladimir M Malkin
(Princeton University)
Nathaniel J Fisch
(Princeton University)
plasma can be enabled by mildly-relativistic nonlinear renormalization of the classical dispersion law
which does not allow the resonant collinear four-photon scattering. It remained unclear, however,
if the collinear four-photon scattering may produce a significant depletion of the pump pulses,
because a noticeable pump depletion would change the nonlinear renormalization of laser frequencies
by values much greater than the width of the four-photon resonance. Here, we present the first
example of the collinear four-photon scattering maintaining the exact resonance throughout seed
amplification up to the complete pump depletion. It may enable the all-optical nearly doubling
of frequency of mildly-relativistic-intense laser pulses in the collinear geometry free of challenges
associated with the transverse slippage between the pulses.
*The work is supported by Grant NNSA DENA0003871.
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