Dynamic control of the spatial frequency content of an intense laser via intra-beam energy transfer

Author:

Ludwig J. D.1ORCID,Michel P. M.1ORCID,Chapman T.1ORCID,Belyaev M.1ORCID

Affiliation:

1. Lawrence Livermore National Laboratory , 7000 East Avenue, Livermore, California 94551, USA

Abstract

We present theory and simulations demonstrating that bandwidth-inducing optical smoothing techniques such as smoothing by spectral dispersion (SSD) can initiate intra-beam energy transfer (IBET) within a single beam. IBET consists of energy transfer between the different frequency components of the beam and results in a simultaneous and correlated redistribution of the temporal and spatial frequencies of the laser's electric field. We identify a threshold in bandwidth for IBET to occur and validate the theory with simulations. The bandwidth and the color cycling of SSD can result in IBET in conditions relevant for high-energy density experiments at the National Ignition Facility and Omega Laser. We show that IBET could be used to manipulate a laser's spatial frequency content within a plasma. In particular, this technique could be used to increase a laser's effective f-number, with potential applications for self-guiding in plasmas.

Funder

U.S. Department of Energy

Publisher

AIP Publishing

Subject

Condensed Matter Physics

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