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Proceedings Paper

Two-laser differential absorption for wide molecular bands
Author(s): Richard W. Fox; Y. Rudich; Ranajit K. Talukdar; A. R. Ravishankara; Leo W. Hollberg
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Paper Abstract

To measure trace concentrations of the atmospheric radical NO3 we are investigating the use of two amplitude stabilized diode lasers, one tunes to the center of the absorption profile, and the second tuned to a wavelength outside the absorption. This approach is taken because the absorption feature is much broader than the visible diode laser's tuning range and removing the sample concentration from the beam path to measure the baseline is difficult. This paper describes the preliminary system design, interferences expected from water, and electronics design.

Paper Details

Date Published: 31 October 1996
PDF: 5 pages
Proc. SPIE 2830, Optical Spectroscopic Techniques and Instrumentation for Atmospheric and Space Research II, (31 October 1996); doi: 10.1117/12.256131
Show Author Affiliations
Richard W. Fox, National Institute of Standards and Technology (United States)
Y. Rudich, NOAA (United States)
Ranajit K. Talukdar, NOAA (United States)
A. R. Ravishankara, NOAA (United States)
Leo W. Hollberg, National Instutute of Standards and Technology (United States)


Published in SPIE Proceedings Vol. 2830:
Optical Spectroscopic Techniques and Instrumentation for Atmospheric and Space Research II
Paul B. Hays; Jinxue Wang, Editor(s)

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