Improved temperature precision in rotational coherent anti-stokes raman spectroscopy with a modeless dye laser.
Single-shot thermometry with dual-broadband rotational coherent anti-Stokes Raman spectroscopy that employs amplified spontaneous emission from a broadband modeless dye laser has been examined. Evaluation of single-shot spectra of air, N2, and O2 showed an improved temperature precision at room temperature compared with the precision obtained with a conventional dye laser. A comparison was also made between the use of single-mode and multimode Nd:YAG lasers as sources for narrowband radiation, and in all cases the single-mode Nd:YAG laser resulted in higher precision. The experimental results are compared with theoretical predictions.
Division of Combustion Physics, Lund Institute of Technology, P.O. Box 118, 221 00 Lund, Sweden. fredrik.vestin@forbrf.lth.se
Fredrik
F
Vestin
Mikael
M
Afzelius
Per-Erik
PE
Bengtsson