Abstract

The performance of the Raman scattering technique for the remote monitoring of temperature and molecular number density in various wind tunnel and engine testing facilities has been experimentally evaluated. Temperature measurements were made by monitoring the pure rotational spectrum of nitrogen and the rotational branch separations of <i>v</i>₂ of CF₄ for temperatures in the range 300 to 1000°K. These measurements yielded an average error of 2.6 and 7.6%, respectively, for temperature measurements at pressures near 1 atm. Molecular number density measurements with 20% error could be made at densities as low as 3.5 × 10⁺²²m⁻³ by monitoring the 8 ← 6 rotational transition of nitrogen, 3.5 × 10⁺²² m⁻³ by monitoring the Q-branch of the fundamental vibrational transition of nitrogen, and 7 × 10⁺²² m⁻³ by monitoring the <i>v</i>₁ fundamental vibrational transition of CF₄.

Development of high-resolution N₂ coherent anti-Stokes Raman scattering for measuring pressure, temperature, and density in high-speed gas flows

Mark A. Woodmansee, Robert P. Lucht, and J. Craig Dutton
Appl. Opt. 39(33) 6243-6256 (2000)

Cross section for the Raman effect in molecular nitrogen gas

H. A. Hyatt, J. M. Cherlow, W. R. Fenner, and S. P. S. Porto
J. Opt. Soc. Am. 63(12) 1604-1606 (1973)

Remote sensing of subsurface water temperature by Raman scattering

D. A. Leonard, B. Caputo, and F. E. Hoge
Appl. Opt. 18(11) 1732-1745 (1979)

Coherent Rayleigh-Brillouin scattering measurement of atmospheric atomic and molecular gas temperature

Jacob Graul and Taylor Lilly
Opt. Express 22(17) 20117-20129 (2014)

Raman scattering in single-crystal sapphire at elevated temperatures

Juddha Thapa, Bo Liu, Steven D. Woodruff, Benjamin T. Chorpening, and Michael P. Buric
Appl. Opt. 56(31) 8598-8606 (2017)