Thermooptical laser generation of sound in the atmosphere. Optoacoustic sensing system “Eva”

• Published in: Russian physics journal Vol. 68; no. 3; pp. 500 - 509
• Main Authors: Potekaev, A. I., Krasnenko, N. P., Shamanaeva, L. G.
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01.03.2025; Springer Nature B.V
• Subjects: Absorptivity; Condensed Matter Physics; Hadrons; Heavy Ions; High power lasers; Laser beams; Lasers; Mathematical and Computational Physics; Nuclear Physics; Optical Devices; Optics; Photonics; Physics; Physics and Astronomy; Pulsed lasers; Radiation absorption; Remote sensing; Theoretical; Optoacoustic diagnostics of laser pulse propagation mode; Optoacoustic sensing of the laser beam parameters
• ISSN: 1064-8887; 1573-9228
• DOI: 10.1007/s11182-025-03457-5

A systematic approach to the study of thermooptical laser generation of sound pulses in the atmosphere, including theoretical background, experimental investigation, verification of obtained experimental results, and its practical application is presented. The proposed approach is being developed at the Tomsk Scientific Center of the Siberian Branch of the Russian Academy of Sciences; moreover, it has not only been tested, but also has been implemented in the optoacoustic sensing system “Eva” intended for optoacoustic remote sensing of the spatial and energetic parameters of high-power laser beams propagating in the under breakdown mode in the atmosphere, including the effective beam radius, divergence angle, laser radiation absorption coefficient, total laser energy per pulse, laser energy density, and integral transmission of pulsed laser radiation on atmospheric paths. A comparison of the results of optoacoustic sensing with bolometric data showed their good agreement.