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1 September 1991 Optical leak detection of oxygen using IR laser diodes
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The ability to accurately measure the concentration of gaseous oxygen and its corresponding flow rate is becoming of greater importance. The technique being presented is based on the principal of light attenuation due to the absorption of radiation by the A-band of oxygen which is located in the 759-770 nm wavelength range. With an ability to measure the change in the light transmission to 0.05, a sensitive optical leak detection system which has a rapid time response is possible. In this research program the application of laser diode technology and its ability to be temperature tuned to a selected oxygen absorption spectral peak has allowed oxygen concentrations as low as 16,000 ppm to be detected.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Peter J. Disimile, Curtis F. Fox, and Norman Toy "Optical leak detection of oxygen using IR laser diodes", Proc. SPIE 1492, Earth and Atmospheric Remote Sensing, (1 September 1991);

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