Ja. Wehrmeyer et al., LINEWISE RAMAN-STOKES ANTI-STOKES TEMPERATURE-MEASUREMENTS IN FLAMES USING AN UNINTENSIFIED CHARGE-COUPLED-DEVICE, Applied physics. B, Lasers and optics, 62(1), 1996, pp. 21-27
One-dimensional, spatially resolved (linewise), temporally averaged St
okes/anti-Stokes temperature measurements with 200 mu m spatial resolu
tion and 6% precision uncertainty are demonstrated in an opposed-jet-d
iffusion flame of air vs N-2-diluted H-2 using the Raman-Stokes/anti-S
tokes technique. The Stokes/anti-Stokes temperature profile is compare
d to temperature measurements obtained using all major species' Q-bran
ches and differences between the two sets of results are discussed. In
addition, single-pulse, linewise measurements with 710 mu m spatial r
esolution and 19% precision uncertainty are also demonstrated. To the
authors' knowledge this is the first report of linewise Stokes/anti-St
okes temperature measurements in flames. Simultaneous measurements of
the N-2 Stokes and anti-Stokes vibrational Q-branches are obtained by
using an unintensified Charge-Coupled Device (CCD) that is gated by a
ferro-electric liquid crystal light valve and/or a low duty cycle opti
cal chopper to suppress detected flame luminosity. This detection syst
em provides increased detection efficiency, dynamic range, and imaged
spectral range over an intensified CCD, allowing spatially resolved St
okes and anti-Stokes signals to be imaged onto one detector.