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Optical Engineering

Narrowband lidar technique for sodium temperature and Doppler wind observations of the upper atmosphere
Author(s): Richard E. Bills; Chester S. Gardner; Chiao Yao She
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Paper Abstract

We describe a new two-frequency lidar for measuring mesospheric Na temperature profiles that uses a stabilized cw single-mode dye laser oscillator (rms frequency jitter < 1 MHz) followed by a pulsed dye power amplifier (140 MHz FWHM linewidth) that is pumped by an injection-locked Nd:YAG laser. The laser oscillator is tuned to the two operating frequencies by observing the Doppler-free structure of the Na D2 fluorescence spectrum in a vapor cell. The lidar technique and our initial observations of the temperature profile between 82 and 102 km at Ft. Collins, CO (40.6°N, 105°W) are described. Absolute temperature accuracies at the Na layer peak of better than K with a vertical resolution of 1 km and an integration period of approximately 5 mm were achieved in this initial experiment. Finally, we discuss a multiple frequency technique for the simultaneous measurement of both temperature and Doppler wind profiles.

Paper Details

Date Published: 1 January 1991
PDF: 9 pages
Opt. Eng. 30(1) doi: 10.1117/12.55765
Published in: Optical Engineering Volume 30, Issue 1
Show Author Affiliations
Richard E. Bills
Chester S. Gardner, Univ. of Illinois/Urbana-Champaign (United States)
Chiao Yao She, Colorado State Univ. (United States)

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