The formation of quasi-nondiffracting focused beams with second-harmonic generation of flower Laguerre-Gaussian modes

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Abstract

We theoretically demonstrate that the second-harmonic generation of a flower LaguerreGaussian mode can be exploited to form a quasi-nondiffracting focused beam. It is verified that the product of donut LaguerreGaussian modes with opposite topological charges leads to the formation of the quasi-nondiffracting focused beam. The divergence of the quasi-nondiffracting focused beam is numerically confirmed to be √2l + 1 times less than that of the Gaussian TEM00 mode with the same beam waist parameter, where l is the azimuthal index of the flower LaguerreGaussian mode. In an experiment, we employ a diode-pumped solid-state laser resonator with intracavity second-harmonic generation to realize the formation of the quasi-nondiffracting focused beams.

Original languageEnglish
Article number115405
JournalLaser Physics
Volume23
Issue number11
DOIs
StatePublished - 1 Nov 2013

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