Abstract

A mixture of SF₆-O₂ is irradiated by an infrared (10.6 μm) cw CO₂ laser. Absorption by SF₆, and subsequent collisional energy transfer, heats the mixture. Vibrationally excited ground-state O₂ is detected at levels v = 0, 1, and 2 by laser-induced fluorescence in the <i>B</i>³ Σ^-_u-<i>X</i>³Σ^-_<i>g</i> – Schumann-Runge system with an ArF laser (193.3 nm). Comparison of the observed LIF spectrum with spectra simulated at various temperatures shows that the molecular oxygen in the IR laser beam is thermalized at a temperature of about 700 K.

Single-pulse, two-line temperature-measurement technique using KrF laser-induced O₂ fluorescence

J. H. Grinstead, G. Laufer, and J. C. McDaniel
Appl. Opt. 34(24) 5501-5512 (1995)

Method for measuring temperatures and densities in hypersonic wind tunnel air flows using laser-induced O₂ fluorescence

Gabriel Laufer, Robert L. McKenzie, and Douglas G. Fletcher
Appl. Opt. 29(33) 4873-4883 (1990)

Quantitative imaging of temperature fields in air using planar laser-induced fluorescence of O₂

Michael P. Lee, Phillip H. Paul, and Ronald K. Hanson
Opt. Lett. 12(2) 75-77 (1987)

Laser-fluorescence imaging of O₂ in combustion flows using an ArF laser

Michael P. Lee, Phillip H. Paul, and Ronald K. Hanson
Opt. Lett. 11(1) 7-9 (1986)

Laser-induced fluorescence spectroscopy of the (0, 0) Schumann–Runge band of O₂

P. Pezé, J. Siffre, and B. Dubreuil
Opt. Lett. 19(23) 2021-2023 (1994)