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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 31, Iss. 24 — Aug. 20, 1992
  • pp: 4998–5002

Novel étalon fringe rejection technique for laser absorption spectroscopy

H. C. Sun and E. A. Whittaker  »View Author Affiliations


Applied Optics, Vol. 31, Issue 24, pp. 4998-5002 (1992)
http://dx.doi.org/10.1364/AO.31.004998


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Abstract

When used for trace-gas detection, laser absorption spectroscopy is usually limited by false absorption signals that are traceable to interferometric effects induced by windows and other pairs of optical surfaces. Here we introduce a new technique that can selectively reject these étalon fringes while preserving the true absorption signal over a wide range of étalon free spectral range to absorption linewidth ratios. We present a theoretical analysis and experimental verification by using a tunable lead salt diode laser.

© 1992 Optical Society of America

History
Original Manuscript: October 30, 1991
Published: August 20, 1992

Citation
H. C. Sun and E. A. Whittaker, "Novel étalon fringe rejection technique for laser absorption spectroscopy," Appl. Opt. 31, 4998-5002 (1992)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-31-24-4998


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