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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 28, Iss. 9 — May. 1, 1989
  • pp: 1710–1713

Multipass absorption cell designed for high temperature UHV operation

Ronald D. Schaeffer, J. C. Sproul, J. O’Connell, C. van Vloten, and Arlan W. Mantz  »View Author Affiliations


Applied Optics, Vol. 28, Issue 9, pp. 1710-1713 (1989)
http://dx.doi.org/10.1364/AO.28.001710


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Abstract

This paper describes the design and performance of a tunable diode laser system, incorporating a multipass absorption cell to allow determination of water concentration below 10 ppb and carbon dioxide concentration below 1 ppb in nitrogen semiconductor gas. The cell is used with a tunable Pb-salt diode laser spectrometer frequency locked to a first derivative error signal from an intense vibration–rotation molecular absorption line. Sample concentrations are monitored in the second derivative mode, and the system automatically compensates for laser intensity fluctuations. A flowing gas method is used to minimize adsorption/desorption effects from the sample cell walls.

© 1989 Optical Society of America

History
Original Manuscript: August 4, 1988
Published: May 1, 1989

Citation
Ronald D. Schaeffer, J. C. Sproul, J. O’Connell, C. van Vloten, and Arlan W. Mantz, "Multipass absorption cell designed for high temperature UHV operation," Appl. Opt. 28, 1710-1713 (1989)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-28-9-1710


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References

  1. Anon., “The Big Demands on Specialty Gases,” Chem. Week 26 (21Sept.1983).
  2. F. W. Giacobbe, G. S. Khan, “Production of Ultra-High Purity Nitrogen,” Solid State Technol.77 (July1987).
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  11. Laser Analytics, Inc., Internal Report.

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