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Proceedings Paper

Thermally induced refractive nonlinearity in scattering media
Author(s): Wei-Chiang Lin; James P. Wicksted; Ashley J. Welch; Massoud Motamedi
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Paper Abstract

In this study, the Z-scan technique was used to examine the thermal lens effect in turbid media containing micro-spheres suspended in water. The scattering coefficients of the turbid media were varied from 10 to 100 cm-1. The experimental results suggested that the nonlinear changes in the refractive index of the scattering medium induced by high power laser heating could significantly impact the propagation of laser beam through the scattering medium. Presence of thermally-induced nonlinear changes in refractive index of tissue during high power laser irradiation may significantly alter the distribution of laser light in tissue during laser therapy.

Paper Details

Date Published: 16 June 1997
PDF: 8 pages
Proc. SPIE 2975, Laser-Tissue Interaction VIII, (16 June 1997); doi: 10.1117/12.275512
Show Author Affiliations
Wei-Chiang Lin, Univ. of Texas Medical Branch at Galveston and Univ. of Texas at Austin (United States)
James P. Wicksted, Oklahoma State Univ. (United States)
Ashley J. Welch, Univ. of Texas at Austin (United States)
Massoud Motamedi, Univ. of Texas Medical Branch at Galveston (United States)


Published in SPIE Proceedings Vol. 2975:
Laser-Tissue Interaction VIII
Steven L. Jacques, Editor(s)

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