A new single-pulse, two-line laser-induced O2 fluorescence (LIF) temperature-measurement technique was demonstrated. The fluorescence spectrum obtained with multichannel detection following simultaneous excitation of two coincident transitions in the 0–6 and the 2–7 bands of the B3Σ-u-X3Σ-g Schumann-Runge system was used to determine the gas temperature. The rms error of 100-pulse average LIF temperature measurements, referenced to their corresponding thermocouple measurements, was 1.3% over a temperature range of 1300–1800 K in atmospheric air. Photon shot noise was found to be the primary source of uncertainty for these measurements in a quiescent environment. Single-pulse temperature-measurement uncertainties (1 σ) ranged from approximately 13% at 1300 K to 7% at 1800 K.
© 1995 Optical Society of America
J. H. Grinstead, G. Laufer, and J. C. McDaniel, Jr., "Single-pulse, two-line temperature-measurement technique using KrF laser-induced O2 fluorescence," Appl. Opt. 34, 5501-5512 (1995)