Shock waves and cavitation bubbles dynamics dependence on the intense femtosecond laser radiation energy in distilled water and acetone.

For the first time using the two-dimensional shadowgraphy map (time-laser energy) of energy transfer dynamics on the nanosecond time scale under tightly focused intense femtosecond laser radiation in the volume of strongly absorbing dielectric liquid (acetone, distilled water) was carried out. The energy of the resulting shock wave is proportional to the energy of the incident femtosecond pulse. The dependence of the initial shock wave velocity and the pressure from the laser pulse energy was investigated. The maximum velocity, and accordingly, the pressure observed at the maximum energy was about 4400 ± 400 m / s and 5.9 ± 1.3 GPa in acetone 7200 ± 300 m / s and 26 ± 3GPa in water. Saturation of the shock wave diameter as a function of laser pulse energy and reverse cubic growth to it was obtained. It is shown that the radius of the cavitation bubble was inverse cubic on the laser radiation energy.