Optodynamic Characterization of Laser-Induced Bubbles

• Authors: P. Gregorčič , J. Možina
• Languages of publication: EN

Abstracts

EN

Laser-induced bubbles can be caused by an optical breakdown in water. They are a result of the optodynamical process where the energy of a high intensity laser pulse is converted into the mechanical energy through an optodynamic conversion. At this process the absorbed optical energy causes plasma expansion that in turn initiates dynamic phenomena: spreading of a shock wave and the development of a cavitation bubble. When the cavitation bubble reaches its maximum radius it starts to collapse due to the pressure of the surrounding liquid. This collapse in turn initiates a new bubble growth and bubble collapse. The process therefore repeats itself, resulting in so-called cavitation-bubble oscillations, with a new shock wave being emitted after every collapse. We present an optodynamic characterization of cavitation bubble's oscillations based on a laser beam-deflection probe. Employed setup enabled us one- or two-dimensional scanning with deflections of a laser probe beam. Deflections were detected with a fast quadrant photodiode.

Keywords

EN

42.62.-b; 47.40.-x; 47.55.dd

Discipline

• 47.55.dd: Bubble dynamics
• 42.62.-b: Laser applications
• 47.40.-x: Compressible flows; shock waves(see also 43.25.Cb Macrosonic propagation, finite amplitude sound; shock waves in Acoustics Appendix; 52.35.Tc Shock waves and discontinuities in Physics of plasmas and electric discharges; 82.40.Fp Shock wave initiated reactions, high-pressure chemistry in Physical chemistry and chemical physics)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2007
• Volume: 112
• Issue: 5
• Pages: 1137-1143

Dates

published

2007-11

received

2007-09-03

Contributors

author

P. Gregorčič

• Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, 1000 Ljubljana, Slovenia

author

J. Možina

• Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, 1000 Ljubljana, Slovenia

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Identifiers

DOI

10.12693/APhysPolA.112.1137