Abstract
Results of theoretical and experimental investigations into the spectra of acoustic signals generated by high-power pulsed laser radiation propagating in the atmosphere in the breakdown regime are presented. Results of analogous investigations for laser breakdown on a single aerosol particle and ensemble of monodispersed particles versus the particle material and size were published in [1]. In the present work, acoustic spectra of discrete laser sparks in the atmosphere are analyzed, and their special features in comparison with acoustic spectra of individual plasma formations, spectra of acoustic signals generated by pulsed laser radiation propagating in the atmosphere in thermooptical regime, and laboratory spectra of continuous laser sparks are discussed.
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