Thermally induced damage studies with shaped light

Bathusile N. Masina; Bonex W. Mwakikunga; Andrew Forbes

doi:10.1117/1.OE.52.4.044301

8 April 2013 Thermally induced damage studies with shaped light

Bathusile N. Masina, Bonex W. Mwakikunga, Andrew Forbes

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Optical Engineering, Vol. 52, Issue 4, 044301 (April 2013). https://doi.org/10.1117/1.OE.52.4.044301

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.

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Bathusile N. Masina, Bonex W. Mwakikunga, and Andrew Forbes "Thermally induced damage studies with shaped light," Optical Engineering 52(4), 044301 (8 April 2013). https://doi.org/10.1117/1.OE.52.4.044301

Published: 8 April 2013

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KEYWORDS

Diamond

Temperature metrology

Scanning electron microscopy

Raman spectroscopy

Thermography

Infrared cameras

Beam shaping

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