Title :
A first-order model for computation of laser-induced breakdown thresholds in ocular and aqueous media. II. Comparison to experiment
Author :
Kennedy, Paul K. ; Boppart, Stephen A. ; Hammer, Daniel X. ; Rockwell, Benjamin A. ; Noojin, GaryD ; Roach, W.P.
Author_Institution :
Opt. Radiation Div., Brooks AFB, TX, USA
fDate :
12/1/1995 12:00:00 AM
Abstract :
For pt. I see ibid., vol.31, no.12, p.2241-9 (1995). An analytic, first-order model has been developed to calculate irradiance thresholds for laser-induced breakdown (LIB) in condensed media, including ocular and aqueous media. A complete derivation and description of the model was given in a previous paper (Part I). The model has been incorporated into a computer code and code results have been compared to experimentally measured irradiance thresholds for breakdown of ocular media, saline, and water by nanosecond, picosecond, and femtosecond laser pulses in the visible and near-infrared. The comparison included both breakdown data from the literature and from our own measurements. Theoretical values match experiment to within a factor of 2 or better, over a range of pulsewidths spanning five orders of magnitude
Keywords :
biological effects of laser radiation; electric breakdown; eye; multiphoton processes; photoionisation; physiological models; water; analytic first-order model; aqueous media; code results; computer code; condensed media; femtosecond laser pulses; first-order model; irradiance thresholds; laser-induced breakdown thresholds; nanosecond laser pulses; near-infrared; ocular media; picosecond laser pulses; pulsewidths; saline; visible; water; Computational modeling; Electric breakdown; Ionization; Laboratories; Laser modes; Laser theory; Optical pulses; Plasma density; Pulse measurements; Ultrafast optics;
Journal_Title :
Quantum Electronics, IEEE Journal of
