G. N. Grachev, I. B. Miroshnichenko, A. L. Smirnov, P. A. Statsenko, V. N. Tishchenko, A. G. Berezutskii, “Localisation of intense sound produced by an optical pulsating discharge in the air”, Kvantovaya Elektronika, 2017, Volume 47, Number 10,Pages <nobr>911

Interaction of laser radiation with matter. Laser plasma

Localisation of intense sound produced by an optical pulsating discharge in the air

G. N. Grachev, I. B. Miroshnichenko, A. L. Smirnov, P. A. Statsenko, V. N. Tishchenko, A. G. Berezutskii

Institute of Laser Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk

Abstract: It is shown that the localisation radius and the spectrum of intense sound produced by an optical pulsating discharge in the air depend on the power and repetition rate of the repetitively pulsed laser radiation, which is associated with a manifestation of the wave merging mechanism and sound absorption in the air. The experiment makes use of a CO2 laser with a power of ~1.5 kW and a repetition rate of microsecond pulses of ~50 kHz.

Keywords: optical pulsating discharge, repetitively pulsed laser radiation, shock wave, spectrum, sound, localisation radius.

Received: 18.04.2017