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Proceedings Paper

Intracavity generation of low-loss radial-order Laguerre-Gaussian modes using digital holograms
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Paper Abstract

In this conference paper we experimentally demonstrate the generation of Radial-order Laguerre-Gaussian (LGpl) modes of radial-order p and azimuthal order l = 0, using intracavity beam shaping technique. An amplitude mask encoded on digital holograms, and displayed on a spatial light modulator, acts as an end-mirror of the resonator (SLM). The digital holograms contained absorbing rings that matched the zeros of the desired Laguerre-Gaussian mode. We demonstrated the generation of LGp0, for p = 0 to p = 3, by using full circular absorbing rings and incomplete circular absorbing rings. We are illustrating the advantages associated using incomplete circular absorbing rings. We also observed that the laser resonator will have a lower threshold, while at the same time maintain the same laser characteristics.

Paper Details

Date Published: 22 April 2016
PDF: 7 pages
Proc. SPIE 9727, Laser Resonators, Microresonators, and Beam Control XVIII, 97271K (22 April 2016); doi: 10.1117/12.2199421
Show Author Affiliations
Teboho Bell, CSIR National Laser Ctr. (South Africa)
Univ. of KwaZulu-Natal (South Africa)
Kamel Äit-Ameur, ENSICAEN (France)
Andrew Forbes, Univ. of the Witwatersrand (South Africa)
Sandile Ngcobo, CSIR National Laser Ctr. (South Africa)

Published in SPIE Proceedings Vol. 9727:
Laser Resonators, Microresonators, and Beam Control XVIII
Alexis V. Kudryashov; Alan H. Paxton; Vladimir S. Ilchenko, Editor(s)

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