Abstract
A disadvantage of pure rotational coherent anti-Stokes Raman
scattering (CARS) compared with vibrational CARS is the limited
dynamic range for temperature measurements. Here an optical
configuration is described that overcomes this limitation by the use of
two different center-frequency dye lasers in a dual-broadband CARS
approach. Its performance is demonstrated for simultaneous pure
rotational CARS temperature and relative N2–O2
concentration measurements up to 1950 K at ambient pressure.
© 1998 Optical Society of America
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