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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/5253

Title: Transverse mode selection in a monolithic microchip laser
Authors: Naidoo, D
Godin, T
Fromager, M
Cagniot, E
Passilly, N
Forbes, A
Aït-Ameur, K
Keywords: Pump shaping
Microchip laser
Vortex beam
Higher order modes
Monolithic microchip laser
Laser oscillation
Issue Date: Nov-2011
Publisher: Elsevier
Citation: Naidoo, D, Godin, T, Fromager, M et al. 2011. Transverse mode selection in a monolithic microchip laser. Optics Communications, Vol 284(23), pp 5475-5479
Series/Report no.: Workflow request;7350
Abstract: The article outlines an approach to mode selection in a microchip laser through judicious shaping of the pump light to create a high modal overlap with the desired mode. The authors demonstrate the principle by creating a donut-shaped pump profile in the focal plane of a converging lens, and use this profile to longitudinally pump a monolithic microchip laser where the output is a Laguerre–Gaussian mode of radial index p=0 and azimuthal index l=1 (LG0l), or vortex beam, of power ~12 mW with a slope efficiency of 17%. This approach of diffractive pump shaping in the Fourier domain is advantageous as it allows for high pump intensity even with low pumping powers, thus ensuring sufficient gain is achieved for laser oscillation.
Description: This is the author’s version of a work that was accepted for publication in Optics Communications. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Optics Communications, Vol 284(23), pp 5475-5479
URI: http://www.sciencedirect.com/science/article/pii/S0030401811008479
ISSN: 0030-4018
Appears in Collections:Laser physics and technology
General science, engineering & technology

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