We report the first use to our knowledge of the anomalous fluorescence of pyrene to determine flame temperature. Vapor-phase pyrene was injected into fuel-rich ethylene/oxygen flames at 80 Torr. The relative laser-induced (S2 → S0)/(S1 → S0) emission was monitored as a function of height above the burner and compared with the temperature profile as measured by thermocouples and sodium D-line reversal. The agreement between the ratioing technique and the flame-temperature profile demonstrates the potential of the method.
© 1986 Optical Society of America
Original Manuscript: December 23, 1985
Manuscript Accepted: March 13, 1986
Published: June 1, 1986
D. L. Peterson, N. M. Laurendeau, and F. E. Lytle, "Determination of flame temperature using the anomalous fluorescence of pyrene," Opt. Lett. 11, 345-347 (1986)