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Optical Engineering

Radially polarized cylindrical vector beams from a monolithic microchip laser
Author(s): Darryl Naidoo; Michael Fromager; Kamel Äit-Ameur; Andrew Forbes
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Paper Abstract

Monolithic microchip lasers consist of a thin slice of laser crystal where the cavity mirrors are deposited directly onto the end faces. While this property makes such lasers very compact and robust, it prohibits the use of intracavity laser beam shaping techniques to produce complex light fields. We overcome this limitation and demonstrate the selection of complex light fields in the form of vector-vortex beams directly from a monolithic microchip laser. We employ pump reshaping and a thermal gradient across the crystal surface to control both the intensity and polarization profile of the output mode. In particular, we show laser oscillation on a superposition of Laguerre–Gaussian modes of zero radial and nonzero azimuthal index in both the scalar and vector regimes. Such complex light fields created directly from the source could find applications in fiber injection, materials processing and in simulating quantum processes.

Paper Details

Date Published: 6 July 2015
PDF: 6 pages
Opt. Eng. 54(11) 111304 doi: 10.1117/1.OE.54.11.111304
Published in: Optical Engineering Volume 54, Issue 11
Show Author Affiliations
Darryl Naidoo, CSIR National Laser Ctr. (South Africa)
Michael Fromager, Univ. de Caen Basse Normandie (France)
Kamel Äit-Ameur, Université de Caen Basse Normandie (France)
Andrew Forbes, Univ. of the Witwatersrand (South Africa)

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