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)

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)

Input pulse duration effect on laser-induced underwater acoustic signals

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

Laser energy partitioning in nanosecond pulsed laser-induced air breakdown: effect of incident laser energy

Hamza Qayyum, Aatif Ali Wahaj, Ayesha Noor, Abdel-Haleem Abdel-Aty, Nuha Al-Harbi, Abdul Qayyum, and Zia Ur Rehman
Appl. Opt. 62(19) 5189-5194 (2023)

Influence of surface roughness on nanosecond laser-induced shock wave enhancement effects

Lei Chen, Chuan Guo, Zelin Liu, Hao Liu, Minsun Chen, Zhongjie Xu, Guomin Zhao, and Kai Han
Appl. Opt. 61(29) 8859-8863 (2022)