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Proceedings Paper

A comparison of a first-order thermal lensing model to a closed aperture Z-scan for the propagation of light in ocular media.
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Paper Abstract

The phenomenon of thermal lensing was investigated in water using a Z-scan method and corresponding first-order mathematical models. Data from first-order thermal lensing models and ABCD beam propagation methods were used to simulate the non-linear absorption of water held in a thin sample cuvette for a Z-scan optical set up of CW cases at 1313 nm. The single beam closed aperture Z-scan was then used to determine the non-linear absorption at 1313 nm for water in 10 mm and 2 mm cuvettes at 48.00, 16.80, 9.80 and 2.83 mW then compared to the first-order model data. The results from the closed aperture Z-scan were also used to back calculate the spot size in the far field for comparison to the model's prediction of the beam's temporal response. Experimental Z-scan data were found not to correlate strongly with our first-order model suggesting the need for higher order models to successfully predict spot size in absorbing media inside the Rayleigh range.

Paper Details

Date Published: 1 March 2006
PDF: 9 pages
Proc. SPIE 6084, Optical Interactions with Tissue and Cells XVII, 60840G (1 March 2006); doi: 10.1117/12.645445
Show Author Affiliations
Rebecca L. Vincelette, Air Force Research Lab. (United States)
Univ. of Texas at Austin (United States)
Robert J. Thomas, Air Force Research Lab. (United States)
Benjamin A. Rockwell, Air Force Research Lab. (United States)
Ashley J. Welch, Univ. of Texas at Austin (United States)

Published in SPIE Proceedings Vol. 6084:
Optical Interactions with Tissue and Cells XVII
Steven L. Jacques; William P. Roach, Editor(s)

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