Temperature dependence of laser-induced breakdown

Daniel X. Hammer; Rex A. Eiserer; Gary D. Noojin; Stephen A. Boppart; Paul K. Kennedy; William P. Roach

doi:10.1117/12.182956

17 August 1994 Temperature dependence of laser-induced breakdown

Daniel X. Hammer, Rex A. Eiserer, Gary D. Noojin, Stephen A. Boppart, Paul K. Kennedy, William P. Roach

Proceedings Volume 2134, Laser-Tissue Interaction V; and Ultraviolet Radiation Hazards; (1994) https://doi.org/10.1117/12.182956
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

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.

Citation Download Citation

Daniel X. Hammer, Rex A. Eiserer, Gary D. Noojin, Stephen A. Boppart, Paul K. Kennedy, and William P. Roach "Temperature dependence of laser-induced breakdown", Proc. SPIE 2134, Laser-Tissue Interaction V; and Ultraviolet Radiation Hazards, (17 August 1994); https://doi.org/10.1117/12.182956

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