Abstract

Evolution of acoustic shock wave (ASW) properties generated during nanosecond (ns) and picosecond (ps) laser-induced breakdown (LIB) of atmospheric air at different input intensities is presented. The intensity is varied by changing the focal geometry of ns and ps pulses. The ASW pressures are observed to follow the dynamic interplay between the plasma density and recombination of plasma species. The conversion of laser energy to acoustic energy has increased from loose to tight focusing conditions. The central frequencies have moved toward the lower side with increasing laser intensities for both ns-LIB (76–48 kHz) and ps-LIB (111.2–92.1 kHz). The angular distribution of acoustic emissions was observed to follow the laser-induced plasma spark in both ns- and ps-LIB.

© 2017 Optical Society of America

Effect of pulse duration on the acoustic frequency emissions during the laser-induced breakdown of atmospheric air

E. Manikanta, L. Vinoth Kumar, P. Venkateshwarlu, Ch. Leela, and P. Prem Kiran
Appl. Opt. 55(3) 548-555 (2016)

Input pulse duration effect on laser-induced underwater acoustic signals

J. Yellaiah and P. Prem Kiran
Appl. Opt. 60(16) 4582-4590 (2021)

Effect of focusing conditions on laser-induced shock waves at titanium–water interface

Arpita Nath and Alika Khare
Appl. Opt. 50(19) 3275-3281 (2011)

Direct evidence of laser-induced shock wave plasma from organic targets in low pressure He ambient gas, showing the effect of target hardness on its propagation speed and the resulted spectral performance

Kurnia Lahna, Marincan Pardede, Koo Hendrik Kurniawan, Kiichiro Kagawa, and May On Tjia
Appl. Opt. 56(36) 9876-9881 (2017)

Control of the acoustic waves generated by intense laser filamentation in water

V. Jukna, S. Albert, C. Millon, B. Mahieu, R. Guillermin, G. Rabau, D. Fattaccioli, A. Mysyrowicz, A. Couairon, and A. Houard
Opt. Express 30(6) 9103-9111 (2022)