Interaction mechanisms of cavitation bubbles induced by spatially and temporally separated fs-laser pulses

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Tinne, N.; Kaune, B.; Krüger, A.; Ripken, T.: Interaction mechanisms of cavitation bubbles induced by spatially and temporally separated fs-laser pulses. In: PLoS ONE 9 (2014), Nr. 12, e114437. DOI:

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The emerging use of femtosecond lasers with high repetition rates in the MHz regime together with limited scan speed implies possible mutual optical and dynamical interaction effects of the individual cutting spots. In order to get more insight into the dynamics a time-resolved photographic analysis of the interaction of cavitation bubbles is presented. Particularly, we investigated the influence of fslaser pulses and their resulting bubble dynamics with various spatial as well as temporal separations. Different time courses of characteristic interaction effects between the cavitation bubbles were observed depending on pulse energy and spatio-temporal pulse separation. These ranged from merely no interaction to the phenomena of strong water jet formation. Afterwards, the mechanisms are discussed regarding their impact on the medical application of effective tissue cutting lateral to the laser beam direction with best possible axial precision: the mechanical forces of photodisruption as well as the occurring water jet should have low axial extend and a preferably lateral priority. Furthermore, the overall efficiency of energy conversion into controlled mechanical impact should be maximized compared to the transmitted pulse energy and unwanted long range mechanical side effects, e.g. shock waves, axial jet components. In conclusion, these experimental results are of great importance for the prospective optimization of the ophthalmic surgical process with high-repetition rate fs-lasers.
License of this version: CC BY 4.0 Unported
Document Type: Article
Publishing status: publishedVersion
Issue Date: 2014
Appears in Collections:An-Institute

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pos. country downloads
total perc.
1 image of flag of Germany Germany 87 72.50%
2 image of flag of United States United States 12 10.00%
3 image of flag of China China 7 5.83%
4 image of flag of India India 2 1.67%
5 image of flag of Spain Spain 2 1.67%
6 image of flag of Portugal Portugal 1 0.83%
7 image of flag of Jordan Jordan 1 0.83%
8 image of flag of France France 1 0.83%
9 image of flag of Canada Canada 1 0.83%
10 image of flag of Austria Austria 1 0.83%
    other countries 5 4.17%

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