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Proceedings Paper

Retinal damage from femtosecond to nanosecond laser exposure
Author(s): Robert J. Thomas; Gary D. Noojin; David J. Stolarski; Gordon T. Hengst; Cynthia A. Toth; William P. Roach; Benjamin A. Rockwell
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Paper Abstract

The Air Force has led a research effort to investigate the thresholds and mechanisms for retinal damage from ultrashort laser pulses. The results suggest that nonlinear optical phenomena mitigate the eventual damage threshold of the retina, while the fundamental mechanisms for damage remain unchanged from 100 fs to 10 microsecond(s) . The result of this research is a recommendation for the establishment of maximum permissible exposure limits in the visible and near IR that reflect the results of the nonlinear interaction. We review the progress made in determine trends in retinal damage from laser pulses from one nanosecond to one hundred femtoseconds for visible and near-IR wavelengths including variations in spot size and number of pulses. We discuss the most likely damage mechanisms, including nonlinear optical interactions pertinent in this pulse width regime and discuss relevance to laser safety.

Paper Details

Date Published: 3 March 2000
PDF: 8 pages
Proc. SPIE 3902, Laser-Induced Damage in Optical Materials: 1999, (3 March 2000); doi: 10.1117/12.379341
Show Author Affiliations
Robert J. Thomas, The Analytical Sciences Corp., Inc. (United States)
Gary D. Noojin, The Analytical Sciences Corp., Inc. (United States)
David J. Stolarski, The Analytical Sciences Corp., Inc. (United States)
Gordon T. Hengst, Air Force Research Lab. (United States)
Cynthia A. Toth, Duke Univ. Eye Ctr. (United States)
William P. Roach, Uniformed Services Univ. of the Health Sciences (United States)
Benjamin A. Rockwell, Air Force Research Lab. (United States)

Published in SPIE Proceedings Vol. 3902:
Laser-Induced Damage in Optical Materials: 1999
Gregory J. Exarhos; Arthur H. Guenther; Mark R. Kozlowski; Keith L. Lewis; M. J. Soileau, Editor(s)

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