Molecular gas analysis by Raman scattering in intracavity laser configuration
Patent
·
OSTI ID:6875660
A system is described for the near simultaneous analysis and quantitation of selected multiple polyatomic gases in a gas sample by Raman light scattering comprising in combination: (a) laser means capable of producing a polarized laser beam of a selected wavelength containing a laser cavity the laser cavity containing a plasma tube and wherein one end of the laser cavity contains a high reflectivity output coupler mirror; (b) a gas sampling cell located within the laser cavity between the plasma tube and the output coupler mirror, the cell having opposing parallel end windows interconnected by a continuous sidewall. The end windows and sidewall define a longitudinal gas chamber oriented such that, when the laser beam is activated, the laser beam is coincident with and traverses the axis of the longitudinal gas chamber, the end windows being positioned to be substantially normal to the axis of the longitudinal gas cell chamber. The cell also has opposing, aligned side windows in the sidewall parallel to and on either side of the axis of the longitudinal gas chamber. The gas cell further contains inlet and outlet means communicating with the chamber to pass a sample gas through the cell.
- Assignee:
- Univ. of Utah, Salt Lake City, UT
- Patent Number(s):
- US 4648714
- OSTI ID:
- 6875660
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
ALIGNMENT
BEAMS
DESIGN
FILTERS
FLUIDS
GAS ANALYSIS
GASES
LASER CAVITIES
LASER MIRRORS
LASER SPECTROSCOPY
LASERS
LENSES
LIGHT SCATTERING
MIRRORS
OPTICAL FILTERS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
PLASMA
POLARIZED BEAMS
POSITIONING
RAMAN EFFECT
RAMAN SPECTROSCOPY
REFLECTIVITY
SAMPLING
SCATTERING
SPECTROSCOPY
SURFACE PROPERTIES
TUBES
WAVELENGTHS
400102 -- Chemical & Spectral Procedures
42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
ALIGNMENT
BEAMS
DESIGN
FILTERS
FLUIDS
GAS ANALYSIS
GASES
LASER CAVITIES
LASER MIRRORS
LASER SPECTROSCOPY
LASERS
LENSES
LIGHT SCATTERING
MIRRORS
OPTICAL FILTERS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
PLASMA
POLARIZED BEAMS
POSITIONING
RAMAN EFFECT
RAMAN SPECTROSCOPY
REFLECTIVITY
SAMPLING
SCATTERING
SPECTROSCOPY
SURFACE PROPERTIES
TUBES
WAVELENGTHS