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Optical Engineering

Thermally induced damage studies with shaped light
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Paper Abstract

We outline an all-optical and noncontact approach for controlled laser heating and measurement of the resultant temperature distribution at the surface of a material, respectively. We show how the boundary conditions of the heating problem may be controlled optically through shaping of the pump light and use the examples of both Gaussian and flat-top beams. These two beams, together with appropriate nonoptical boundary control, allow for the laser-induced thermal study of materials with and without thermal stress. We illustrate the technique on an industrial diamond sample where a gradient and uniform temperature profile on the surface of the diamond was successfully created and measured. We use the technique to study the thermally induced degradation of industrial diamond in a controlled manner.

Paper Details

Date Published: 8 April 2013
PDF: 9 pages
Opt. Eng. 52(4) 044301 doi: 10.1117/1.OE.52.4.044301
Published in: Optical Engineering Volume 52, Issue 4
Show Author Affiliations
Bathusile N. Masina, Council for Scientific and Industrial Research (South Africa)
Bonex W. Mwakikunga, Council for Scientific and Industrial Research (South Africa)
Andrew Forbes, CSIR National Laser Ctr. (South Africa)

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