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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 21, Iss. 7 — Apr. 1, 1982
  • pp: 1185–1190

Atmospheric pressure monitoring of trace gases using tunable diode lasers

D. T. Cassidy and J. Reid  »View Author Affiliations


Applied Optics, Vol. 21, Issue 7, pp. 1185-1190 (1982)
http://dx.doi.org/10.1364/AO.21.001185


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Abstract

High-sensitivity measurements of infrared absorptions due to isolated lines broadened by air at atmospheric pressure are reported. Tunable diode lasers and harmonic techniques were employed to detect absorptions as small as 0.01% over path lengths up to 250 m through the open air. The limiting noise source is caused by a base line signal which varies with the optical alignment. The reported sensitivity is not a fundamental limit. Techniques for further increasing sensitivity are discussed.

© 1982 Optical Society of America

History
Original Manuscript: December 24, 1981
Published: April 1, 1982

Citation
D. T. Cassidy and J. Reid, "Atmospheric pressure monitoring of trace gases using tunable diode lasers," Appl. Opt. 21, 1185-1190 (1982)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-21-7-1185


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