Investigation of Laser Resonant Absorption for Gas Dynamics Measurements
Final rept. 27 Oct 1969-15 Jan 1971
ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFB TN
Pagination or Media Count:
A feasibility study of a technique to measure gas densities using resonant scattering of laser light is described. The technique involves the illumination of the gas by a laser beam whose frequency is matched to a natural transition frequency of one species of the gas. The reemitted light is then detected. The density is obtained from the integrated absorption coefficient which is determined by sweeping the laser frequency over the line. A theoretical description is given of line broadening mechanisms. Experimental studies were initiated involving both absorption and reemission of coherent radiation.
- Fluid Mechanics
- Atomic and Molecular Physics and Spectroscopy