Generation of coherent rotational anti-Stokes spectra

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

1975-02-18

1976-08-03

La Roche, Eugene

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250226, 250578, 356 75, G01J 310, G01J 328, G01N 2122

Patent

active

039731340

ABSTRACT:
A method and apparatus 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.

REFERENCES:
patent: 3802777 (1974-04-01), Regnier et al.
Wynne, Nonlinear Optical Spectrometer, IBM Technical Disclosure Bulletin, vol. 15, No. 5, Oct. 1972, pp. 1469-1470.

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