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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 36, Iss. 15 — May. 20, 1997
  • pp: 3294–3297

Measurement of nitric oxide with an antimonide diode laser

Daniel B. Oh and Alan C. Stanton  »View Author Affiliations


Applied Optics, Vol. 36, Issue 15, pp. 3294-3297 (1997)
http://dx.doi.org/10.1364/AO.36.003294


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Abstract

An antimonide diode laser operating near 2.65 µm was used to measure absorption lines of NO gas in the first overtone band. A blended line pair of NO that is sufficiently free of interference from H2O to permit the selective detection of NO under reduced pressure conditions was identified. With wavelength-modulation spectroscopy, a rms noise level equivalent to an absorbance of 3.2 × 10-5 was achieved at a measurement integration time (for a single spectral data point) of 0.1 s. The corresponding detection sensitivity (signal-to-noise ratio of 2) for NO in air at reduced pressure was ∼15 ppm m (ppm is parts in 106). Antimonide diode lasers show substantial promise for gas-sensing applications because they can gain access to relatively strong absorption lines of several gases of environmental interest at operating wavelengths at which cryogenic cooling is not required.

© 1997 Optical Society of America

History
Original Manuscript: October 4, 1996
Revised Manuscript: January 2, 1997
Published: May 20, 1997

Citation
Daniel B. Oh and Alan C. Stanton, "Measurement of nitric oxide with an antimonide diode laser," Appl. Opt. 36, 3294-3297 (1997)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-36-15-3294

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