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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 13 — May. 1, 2013
  • pp: 3100–3107

Nonlinear swept frequency technique for CO2 measurements using a CW laser system

Joel F. Campbell  »View Author Affiliations

Applied Optics, Vol. 52, Issue 13, pp. 3100-3107 (2013)

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A system using a nonlinear multiswept sine wave is described, which employs multichannel multiswept orthogonal waves, to separate channels and make multiple, simultaneous online/offline CO 2 measurements. An analytic expression and systematic method for determining the orthogonal frequencies for the unswept, linear swept, and nonlinear swept cases is presented. It is shown that one may reduce sidelobes of the autocorrelation function while preserving cross channel orthogonality, for thin cloud rejection.

OCIS Codes
(170.4090) Medical optics and biotechnology : Modulation techniques
(280.1910) Remote sensing and sensors : DIAL, differential absorption lidar
(300.6360) Spectroscopy : Spectroscopy, laser

ToC Category:

Original Manuscript: March 5, 2013
Manuscript Accepted: March 26, 2013
Published: April 30, 2013

Joel F. Campbell, "Nonlinear swept frequency technique for CO2 measurements using a CW laser system," Appl. Opt. 52, 3100-3107 (2013)

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