Generation of coherent rotational anti-stokes spectra

Details Generation of coherent rotational anti-stokes spectra Generation of coherent rotational anti-stokes spectra

G - Physics

01

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73/59

G01N 21/01 (2006.01) G01J 3/44 (2006.01)

Patent

CA 1068122

INVENTION: GENERATION OF COHERENT ROTATIONAL ANTI-STROKES SPECTRA INVENTORS: JOSEPH J. BARRETT RICHARD F. BEGLEY ABSTRACT OF THE DISCLOSURE A method and aparatus for spectroscopic gas analysis are provided. Two coherent beams of monochromatic radiation are directed through gaseous material. A tuning mechanism adjusts the frequency difference between the radiation beams to equal substantially the rotational frequency of a preselected constituent of the gaseous material. Radiation scattered by the gaseous material is received by a filtering mechanism adapted to transmit selectively an anti- Stokes signal generated coherently during scattering. The signal is received by a detecting mechanism which indicates the intensity thereof.

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