Acoustic cavitation events during microsecond irradiation of aqueous solutions

Badrinarayan S. Amurthur; John A. Viator; Scott A. Prahl

doi:10.1117/12.275016

22 May 1997 Acoustic cavitation events during microsecond irradiation of aqueous solutions

Badrinarayan S. Amurthur, John A. Viator, Scott A. Prahl

Proceedings Volume 2970, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VII; (1997) https://doi.org/10.1117/12.275016
Event: BiOS '97, Part of Photonics West, 1997, San Jose, CA, United States

Abstract

The acoustic boundary conditions at the site of laser irradiation affects the onset of cavitation when stress- confined laser pulses are used. This study reports the thresholds for cavitation when the laser pulse length exceeds the stress confinement time by a factor of eight. The cavitation threshold was defined as the loss of an acoustic signal from the collapse of the cavitation bubble in room temperature dye solutions. The threshold temperature increase for cavitation at a free surface was 13 plus or minus 3 degrees Celsius, at the tip of a 200 micrometer fiber in an aqueous solution was 17 plus or minus 2 degrees Celsius, and at the interface of two acoustically matched boundary materials was 80 plus or minus 20 degrees Celsius.

Citation Download Citation

Badrinarayan S. Amurthur, John A. Viator, and Scott A. Prahl "Acoustic cavitation events during microsecond irradiation of aqueous solutions", Proc. SPIE 2970, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VII, (22 May 1997); https://doi.org/10.1117/12.275016

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