A dual-pump, dual-broadband coherent anti-Stokes Raman scattering system for simultaneous measurements of temperature and concentrations of N2, O2, and CO2 in reacting flows is demonstrated. In this system pure rotational transitions of N2–O2 and rovibrational transitions of N2–CO2 are probed simultaneously with two narrowband pump beams, a broadband pump beam, and a broadband Stokes beam. The main advantage of this technique is that it permits accurate temperature measurements at both low and high temperatures as well as concentration measurements of three molecules.
© 2004 Optical Society of America
Sukesh Roy, Terrence R. Meyer, Robert P. Lucht, Mikael Afzelius, Per-Erik Bengtsson, and James R. Gord, "Dual-pump dual-broadband coherent anti-Stokes Raman scattering in reacting flows," Opt. Lett. 29, 1843-1845 (2004)