Sensitive nonlinear optical spectroscopy

Details Sensitive nonlinear optical spectroscopy Sensitive nonlinear optical spectroscopy

1979-10-24

1981-08-18

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

With raman type light scattering

356318, G01J 344

Patent

active

042843545

ABSTRACT:
Saturation spectroscopy involving synchronous phase-sensitive detection and measurement of the intensity of the output when one of the input beams is chopped has a drawback that scattered light and fluorescence from the sample will also be chopped and produce a large background signal. According to the present invention, the direction of propagation of one of the input beams is modulated. This causes the direction of propagation of the output to be similarly modulated while producing only a negligible effect on the background radiation from scattering and fluorescence.

REFERENCES:
patent: 4193690 (1980-03-01), Levenson et al.
Moore et al., Analytical Chemistry, vol. 45, No. 12, Oct. 1973, pp. 2009-2014.
Eesley et al., Digest of Technical Papers, Jun. 1977, pp. 31 and 32.
Levenson, Physics Today, May 1977, pp. 44-47.
Sorem et al., Optical Communications, vol. 5, No. 3, Jun. 1972, pp. 148-151.
Moses et al., Optics Letters, vol. 1, No. 4, Oct. 1977, pp. 115-117.

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