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Title: Gas concentration measurement instrument based on the effects of a wave-mixing interference on stimulated emissions

Abstract

A method and apparatus are disclosed for measuring partial pressures of gaseous components within a mixture. The apparatus comprises generally at least one tunable laser source, a beam splitter, mirrors, optical filter, an optical spectrometer, and a data recorder. Measured in the forward direction along the path of the laser, the intensity of the emission spectra of the gaseous component, at wavelengths characteristic of the gas component being measured, are suppressed. Measured in the backward direction, the peak intensities characteristic of a given gaseous component will be wavelength shifted. These effects on peak intensity wavelengths are linearly dependent on the partial pressure of the compound being measured, but independent of the partial pressures of other gases which are present within the sample. The method and apparatus allow for efficient measurement of gaseous components. 9 figs.

Inventors:
Issue Date:
Research Org.:
Lockheed Martin Energy Syst Inc
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
563664
Patent Number(s):
5,686,988
Application Number:
PAN: 8-668,509
Assignee:
Lockheed Martin Energy Systems, Inc., Oak Ridge, TN (United States) PTO; SCA: 400102; PA: EDB-98:015548; SN: 98001896357
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 11 Nov 1997
Country of Publication:
United States
Language:
English
Subject:
40 CHEMISTRY; GAS ANALYSIS; LASER SPECTROSCOPY; PARTIAL PRESSURE; GASES; MIXTURES; DESIGN; OPERATION

Citation Formats

Garrett, W.R. Gas concentration measurement instrument based on the effects of a wave-mixing interference on stimulated emissions. United States: N. p., 1997. Web.
Garrett, W.R. Gas concentration measurement instrument based on the effects of a wave-mixing interference on stimulated emissions. United States.
Garrett, W.R. Tue . "Gas concentration measurement instrument based on the effects of a wave-mixing interference on stimulated emissions". United States.
@article{osti_563664,
title = {Gas concentration measurement instrument based on the effects of a wave-mixing interference on stimulated emissions},
author = {Garrett, W.R.},
abstractNote = {A method and apparatus are disclosed for measuring partial pressures of gaseous components within a mixture. The apparatus comprises generally at least one tunable laser source, a beam splitter, mirrors, optical filter, an optical spectrometer, and a data recorder. Measured in the forward direction along the path of the laser, the intensity of the emission spectra of the gaseous component, at wavelengths characteristic of the gas component being measured, are suppressed. Measured in the backward direction, the peak intensities characteristic of a given gaseous component will be wavelength shifted. These effects on peak intensity wavelengths are linearly dependent on the partial pressure of the compound being measured, but independent of the partial pressures of other gases which are present within the sample. The method and apparatus allow for efficient measurement of gaseous components. 9 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {11}
}