Spectral purity of high-intensity laser beams

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DOIResolve DOI: https://doi.org/10.1103/PhysRevA.16.672
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  1. National Research Council of Canada
FormatText, Article
Journal titlePhysical Review A
ISSN2469-9926
2469-9934
Volume16
Issue2
Pages672–680
Abstract
Three experiments are described in which high-intensity ruby and Nd: glass laser beams were analyzed for spectral purity. The aim of the experiments was to verify whether the nonlinear relation for photon energy ε=hν/[1−βνf(I)], previously used to explain ionization phenomena in gases irradiated with laser beams, admitted an interpretation in terms of change of light frequency as a function of intensity. Standard methods of frequency measurement, namely spectroscopic, interferometric, and filtering methods, were used. The results consistently exclude the idea of monochromatic laser beams and seem to indicate that, at the intensities used in the experiments, which ranged from a few hundred kilowatts/cm2 to a few gigawatts/cm2, the laser line is broadened by several hundred angstroms.
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PublisherAmerican Physical Society
LanguageEnglish
Peer reviewedYes
NPARC number23002995
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