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Proceedings Paper

Intracavity beam shaping using an SLM
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Paper Abstract

Intracavity laser beam shaping has been achieved by adding intensity or phase filters to a Fabry-Perot resonator. Changing the output beam from one mode to another is a tedious process, requiring the replacing of custom optical elements, and careful realignment. The digital laser [1] is an innovation which allows the laser beam produced by a laser to be dynamically controlled by a computer. Essentially, one of the resonator mirrors is replaced by a spatial light modulator (SLM), which is a computer controlled, pixellated, liquid-crystal device. While the concept is the device is simple, the implementation revealed subtle properties of spatial light modulators and the liquid crystals contained in them. These properties had to be well understood before their undesirable characteristics could be overcome, allowing the laser to function as conceived in the design.

Paper Details

Date Published: 25 September 2015
PDF: 5 pages
Proc. SPIE 9581, Laser Beam Shaping XVI, 95810A (25 September 2015); doi: 10.1117/12.2188593
Show Author Affiliations
L. Burger, Council for Scientific and Industrial Research (South Africa)
Stellenbosch Univ. (South Africa)
I. Litvin, Council for Scientific and Industrial Research (South Africa)
S. Ngcobo, Council for Scientific and Industrial Research (South Africa)
A. Forbes, Univ. of the Witwatersrand (South Africa)

Published in SPIE Proceedings Vol. 9581:
Laser Beam Shaping XVI
Andrew Forbes; Todd E. Lizotte, Editor(s)

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