Journal Article
Optica, vol. 11, iss. 4, pp. 460, 2024
Authors
John J. McCauley, Mark C. Phillips, Reagan R. D. Weeks, Yu Zhang, Sivanandan S. Harilal, R. Jason Jones
Abstract
This Letter reports dual-frequency-comb spectroscopy in the deep ultraviolet used to characterize transient laser-produced plasmas. Dual-comb spectroscopy at these wavelengths enables access to a large number of strong electronic transitions in neutral and ionized atoms and molecules. This broadband dual-frequency-comb system at 265 nm measures multiple transitions in neutral and singly ionized iron atoms in a laser-produced plasma. Analysis of absorption spectra yields time-resolved ion and neutral column densities, excitation temperatures, and electron densities, which are measured down to 1014cm−3 levels. The results provide insights into low-temperature plasma properties.
