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Updated: Jul 4, 2026

Direct Imaging of Laser-driven Ultrafast Molecular Rotation
Published on: February 4, 2017
Demonstration of high-energy 2 omega (526.5 nm) operation on the National Ignition Facility Laser System
G M Heestand1, C A Haynam, P J Wegner
1Lawrence Livermore National Laboratory, Livermore, CA 94550, USA. heestand1@LLNL.gov
Abstract:
A single beamline of the National Ignition Facility (NIF) has been operated at a wavelength of 526.5 nm (2 omega) by frequency converting the fundamental 1053 nm (1 omega) wavelength with an 18.2 mm thick type-I potassium dihydrogen phosphate (KDP) second-harmonic generator (SHG) crystal. Second-harmonic energies of up to 17.9 kJ were measured at the final optics focal plane with a conversion efficiency of 82%. For a similarly configured 192-beam NIF, this scales to a total 2 omega energy of 3.4 MJ full NIF equivalent (FNE).
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