1 November 2005 Biophysical effects of pulsed lasers in the retina and other tissues containing strongly absorbing particles: shockwave and explosive bubble generation
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J. of Biomedical Optics, 10(6), 064029 (2005). doi:10.1117/1.2139970
Abstract
Damage by pulsed lasers to the retina or other tissues containing strongly absorbing particles may occur through biophysical mechanisms other than simple heating. Shockwaves and bubbles have been observed experimentally, and depending on pulse duration, may be the cause of retinal damage at threshold fluence levels. We perform detailed calculations on the shockwave and bubble generation expected from pulsed lasers. For a variety of different laser pulse durations and fluences, we tabulate the expected strength of the shockwave and size of the bubble that will be generated. We also explain how these results will change for absorbing particles with different physical properties such as absorption coefficient, bulk modulus, or thermal expansion coefficient. This enables the assessment of biological danger, and possible medical benefits, for lasers of a wide range of pulse durations and energies, incident on tissues with absorbing particles with a variety of thermomechanical characteristics.
Eshel Faraggi, Bernard S. Gerstman, Jinming Sun, "Biophysical effects of pulsed lasers in the retina and other tissues containing strongly absorbing particles: shockwave and explosive bubble generation," Journal of Biomedical Optics 10(6), 064029 (1 November 2005). http://dx.doi.org/10.1117/1.2139970
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KEYWORDS
Pulsed laser operation

Particles

Retina

Absorption

Picosecond phenomena

Acoustics

Tissues

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