Intracavity laser spectroscopy for high sensitivity detection of

Details Intracavity laser spectroscopy for high sensitivity detection of Intracavity laser spectroscopy for high sensitivity detection of

1997-06-13

1998-11-24

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356328, 356437, 2503391, 25033913, G01N 2135, G01J 310, G01J 342

Patent

active

058415335

ABSTRACT:
Contaminants are detected optically at concentrations below 1 part-per-million (ppm) and extending to a level approaching 1 part-per-trillion (ppt) by using intracavity laser spectroscopy (ILS) techniques. A solid-state laser with an ion-doped crystal medium contained in an optical resonator cavity (the ILS laser) is employed as a detector. A gas sample containing gaseous contaminant species is placed inside the optical resonator cavity and on one side of the ion-doped crystal. The output signal from the ILS laser is detected and analyzed to identify the gaseous species. The concentration of the gaseous species can be determined as well.

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