Abstract

The monitoring of energy deposition behavior during the plasma formation process is the basis of recently developed laser-induced breakdown thermometry techniques. Utilizing the acoustic waveforms from laser-induced plasmas, a method to monitor the deposited energy was proposed. The linear relationships between the acoustic energy and the deposited energy were established under four different focal lengths. After the distortions in the sound propagation were corrected, the applicable range of this method was extended to a deposited energy from 10 to 240 mJ. The further spectra analysis in the deposited energy space suggested that the total number density of excited species increased with the deposition energy, without significant fluctuations in plasma temperature in the high-energy region.

© 2022 Optical Society of America

Acoustic characteristics of laser-induced plasmas from the forming dynamics perspective

Wendong Wu, Shu Chai, and Yuegui Zhou
Appl. Opt. 62(35) 9375-9382 (2023)

Normalization of underwater laser-induced breakdown spectroscopy using acoustic signals measured by a hydrophone

Fuzhen Huang, Ye Tian, Ying Li, Wangquan Ye, Yuan Lu, Jinjia Guo, and Ronger Zheng
Appl. Opt. 60(6) 1595-1602 (2021)

Comparison of existing laser-induced breakdown thermometry techniques along with a time-resolved breakdown approach

Andrew P. Williamson, Ulrich Thiele, and Johannes Kiefer
Appl. Opt. 58(14) 3950-3956 (2019)

Temperature measurement with compositional correction of gas mixture based on laser-induced plasma

Shishi Li, Meirong Dong, Lihua Cheng, Fasheng Luo, Weihao Zhao, and Jidong Lu
Appl. Opt. 59(25) 7638-7645 (2020)

Beam-crossing configuration to control plasma position, improve spatial resolution, and enhance emissions in single-pulse, laser-induced breakdown spectroscopy in gases

Zhiwei Sun and Zeyad Alwahabi
Appl. Opt. 61(2) 316-323 (2022)