Role of self-focusing in laser-induced breakdown of water caused by nano- and picosecond pulses

Oleg M. Efimov; Andrei M. Mekryukov; Vladimir S. Popikov; Aristide C. Dogariu; Leonid B. Glebov; M. J. Soileau; Eric W. Van Stryland

doi:10.1117/12.274230

13 May 1997 Role of self-focusing in laser-induced breakdown of water caused by nano- and picosecond pulses

Oleg M. Efimov, Andrei M. Mekryukov, Vladimir S. Popikov, Aristide C. Dogariu, Leonid B. Glebov, M. J. Soileau, Eric W. Van Stryland

Author Affiliations +

Proceedings Volume 2966, Laser-Induced Damage in Optical Materials: 1996; (1997) https://doi.org/10.1117/12.274230
Event: Laser-Induced Damage in Optical Materials: 1996, 1996, Boulder, CO, United States

Abstract

An experimental investigation of laser-induced breakdown of water and subthreshold phenomena using pulsed laser radiation in the nanosecond to picosecond region has been performed. It has been shown that self-focusing and suspended particles have a strong influence on laser-induced breakdown of water. A significant decrease in transmittance for an input irradiance 1 to 2 orders of magnitude less than the laser-induced breakdown threshold of water as observed, as well as a strong spot size dependence of this threshold. Besides the investigated processes result in a breakdown threshold of water for small spot sizes that is nearly 10 times larger than that of glass due to a sharp increase in scattering from inhomogeneities formed as a result of self- focusing. For large spot sizes the breakdown threshold of water is considerably less than for the same glasses due to breakdown initiated by suspended particles.

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Oleg M. Efimov, Andrei M. Mekryukov, Vladimir S. Popikov, Aristide C. Dogariu, Leonid B. Glebov, M. J. Soileau, and Eric W. Van Stryland "Role of self-focusing in laser-induced breakdown of water caused by nano- and picosecond pulses", Proc. SPIE 2966, Laser-Induced Damage in Optical Materials: 1996, (13 May 1997); https://doi.org/10.1117/12.274230

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KEYWORDS

Laser induced damage

Glasses

Laser damage threshold

Particles

Picosecond phenomena

Transmittance

Laser scattering

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