Picture of a sphere with binary code

Making Strathclyde research discoverable to the world...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. It exposes Strathclyde's world leading Open Access research to many of the world's leading resource discovery tools, and from there onto the screens of researchers around the world.

Explore Strathclyde Open Access research content

High-repetition-rate combustion thermometry with two-line atomic fluorescence excited by diode lasers

Chrystie, Robin S.M. and Burns, Iain S. and Hult, J. and Kaminski, C.F. (2009) High-repetition-rate combustion thermometry with two-line atomic fluorescence excited by diode lasers. Optics Letters, 34 (16). pp. 2492-2494. ISSN 0146-9592

[img]
Preview
PDF (High-repetition-rate combustion thermometry with two-line atomic fluorescence excited by diode lasers)
Opt_Lett.pdf - Published Version

Download (299kB) | Preview

Abstract

We report on kilohertz-repetition-rate flame temperature measurements performed using blue diode lasers. Two-line atomic fluorescence was performed by using diode lasers emitting at around 410 and 451 nm to probe seeded atomic indium. At a repetition rate of 3.5 kHz our technique offers a precision of 1.5% at 2000 K in laminar methane/air flames. The spatial resolution is better than 150 mu m, while the setup is compact and easy to operate, at much lower cost than alternative techniques. By modeling the spectral overlap between the locked laser and the probed indium lines we avoid the need for any calibration of the measurements. We demonstrate the capability of the technique for time-resolved measurements in an acoustically perturbed flame. The technique is applicable in flames with a wide range of compositions including sooting flames.