Thermally induced refractive nonlinearity in scattering media

Wei-Chiang Lin; James P. Wicksted; Ashley J. Welch; Massoud Motamedi

doi:10.1117/12.275512

16 June 1997 Thermally induced refractive nonlinearity in scattering media

Wei-Chiang Lin, James P. Wicksted, Ashley J. Welch, Massoud Motamedi

Author Affiliations +

Proceedings Volume 2975, Laser-Tissue Interaction VIII; (1997) https://doi.org/10.1117/12.275512
Event: BiOS '97, Part of Photonics West, 1997, San Jose, CA, United States

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.

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Wei-Chiang Lin, James P. Wicksted, Ashley J. Welch, and Massoud Motamedi "Thermally induced refractive nonlinearity in scattering media", Proc. SPIE 2975, Laser-Tissue Interaction VIII, (16 June 1997); https://doi.org/10.1117/12.275512

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