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Proceedings Paper

Temperature dependence of laser-induced breakdown
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Paper Abstract

The physical properties of laser-induced optical breakdown (LIB) in highly transparent, dispersive media, like that found in the eye, are of great interest to the ophthalmic community. We examined the temperature dependent characteristics of LIB thresholds in media with a temperature range of 20 degree(s)C to 80 degree(s)C using nanosecond, picosecond, and femtosecond pulses produced in the visible and near infrared spectral regions. Media used for these studies included high purity water, tap water, physiological (0.9%) saline solution, and bovine vitreous. Ten nanosecond pulses at 532 nm and 60 ps and 90 fs pulses at 580 nm were focused into a sample to produce LIB. Probit analysis was used to determine the 50% probability threshold value (ED50) as the temperature of the media was varied. Additional data was obtained by keeping pulse energy constant and varying temperature. ED50 values for LIB showed no consistent dependence on the temperature of the medium. The theory of the temperature dependence of LIB and the experimental observations for all pulse durations and their implications for retinal damage are discussed.

Paper Details

Date Published: 17 August 1994
PDF: 11 pages
Proc. SPIE 2134, Laser-Tissue Interaction V; and Ultraviolet Radiation Hazards, (17 August 1994); doi: 10.1117/12.182956
Show Author Affiliations
Daniel X. Hammer, Air Force Armstrong Lab. (United States)
Rex A. Eiserer, Air Force Armstrong Lab. (United States)
Gary D. Noojin, The Analytic Science Corp. (United States)
Stephen A. Boppart, Massachusetts Institute of Technology (United States)
Paul K. Kennedy, Air Force Armstrong Lab. (United States)
William P. Roach, Air Force Armstrong Lab. (United States)

Published in SPIE Proceedings Vol. 2134:
Laser-Tissue Interaction V; and Ultraviolet Radiation Hazards
Steven L. Jacques; David H. Sliney; Michael Belkin M.D., Editor(s)

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