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28 April 2014 Effects of cavitation bubble interaction with temporally separated fs-laser pulses
Nadine Tinne, Gesche Knoop, Nicole Kallweit, Sonja Veith, Sebastian Bleeker, Holger Lubatschowski, Alexander Krüger, Tammo Ripken
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Funded by: German Research Foundation (DFG)
Journal of Biomedical Optics, Vol. 19, Issue 4, 048001 (April 2014). https://doi.org/10.1117/1.JBO.19.4.048001
Abstract
We present a time-resolved photographic analysis of the pulse-to-pulse interaction. In particular, we studied the influence of the cavitation bubble induced by a fs-pulse on the optical focusing of the consecutive pulse and its cavitation bubble dynamics in dependence on temporal pulse separation in water. As a first result, by decreasing the temporal separation of laser pulses, there is a diminishment of the laser-induced optical breakdown (LIOB) efficiency in terms of energy conversion, caused by disturbed focusing into persisting gas bubbles at the focal volume. A LIOB at the focal spot is finally suppressed by impinging the expanding or collapsing cavitation bubble of the preceding pulse. These results could be additionally confirmed in porcine gelatin solution with various concentrations. Hence, the interaction between the laser and transparent ophthalmic tissue may be accompanied by a raised central laser energy transmission, which could be observed in case of a temporal pulse overlap. In conclusion, our experimental results are of particular importance for the optimization of the prospective ophthalmic surgical process with future generation fs-lasers.
CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.
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Nadine Tinne, Gesche Knoop, Nicole Kallweit, Sonja Veith, Sebastian Bleeker, Holger Lubatschowski, Alexander Krüger, and Tammo Ripken "Effects of cavitation bubble interaction with temporally separated fs-laser pulses," Journal of Biomedical Optics 19(4), 048001 (28 April 2014). https://doi.org/10.1117/1.JBO.19.4.048001
Published: 28 April 2014
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Cited by 20 scholarly publications.
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KEYWORDS
Pulsed laser operation
Cavitation
Laser energy
Laser tissue interaction
Laser damage threshold
Laser optics
Photodiodes
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