Spectrometry using an optical parametric oscillator

Details Spectrometry using an optical parametric oscillator Spectrometry using an optical parametric oscillator

1995-02-01

1997-08-12

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

356326, G01J 300, G01J 310

Patent

active

056571194

ABSTRACT:
A thermal lens spectrometer utilizes a continuously tunable optical parametric oscillator (OPO) to provide practical, easy-to-build, reliable spectrometer for measuring a wide variety of sample materials over a wide spectral range. A flow cell is placed in the path of the output beam from a tunable optical parametric oscillator, and material to be analyzed is placed in the cell. A laser probe beam is also directed into the cell coaxially with the OPO output beam. The OPO output beam acts as a pump, and the output probe beam from the cell is directed to an intensity sensor. The OPO is tuned over a selected frequency range, under computer control, for example, to produce an output probe beam having an intensity representing the spectral response of the material to be analyzed.

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Kawasaki et al, "Thermal Lens Spectrophotometry Using a Tunable Infrared Laser Generated by a Stimulated Raman Effect", Analytical Chemistry, vol. 59, No. 3, Feb. 1, 1987, pp. 523-525.

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