Reconstruction of laser-induced cavitation bubble dynamics based on a Fresnel propagation approach

Abstract

A single laser-induced cavitation bubble in transparent liquids has been studied through a variety of experimental techniques. High-speed video with varying frame rate up to 20 × 10 7 fps is the most suitable to study nonsymmetric bubbles. However, it is still expensive for most researchers and more affordable (lower) frame rates are not enough to completely reproduce bubble dynamics. This paper focuses on combining the spatial transmittance modulation (STM) technique, a single shot cavitation bubble and a very simple and inexpensive experimental technique, based on Fresnel approximation propagation theory, to reproduce a laser-induced cavitation spatial dynamics. Our results show that the proposed methodology reproduces a laser-induced cavitation event much more accurately than 75,000 fps video recording. In conclusion, we propose a novel methodology to reproduce laser-induced cavitation events that combine the STM technique with Fresnel propagation approximation theory that properly reproduces a laser-induced cavitation event including a very precise identification of the first, second, and third collapses of the cavitation bubble.

Comparison of the overall temporal behavior of the bubbles produced by short- and long-pulse nanosecond laser ablations in water using a laser-beam-transmission probe

“…However, the LBTP signal is strongly correlated with the bubble radius. The signal intensity can be theoretically converted to the bubble radius, if the probe laser is well defined [38]. The absolute radius of the bubble, however, is not essential to study the temporal behavior of the bubble.…”

“…Other approaches have also been used, such as Schlieren imaging [29], X-ray radiography [30], high-speed laser stroboscopic videography [31], pressure transducer or piezoelectric hydrophone [9,32], beam-deflection probe [33][34][35], and optical transmission techniques [36][37][38]. In the case of shadowgraph imaging, multiple events are required to capture the whole bubble dynamics.…”