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Proceedings Paper

Differential absorption laser ranging at the oxygen A-band
Author(s): Robert J. Smith
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Paper Abstract

Work on a diode laser-based collision-avoidance approach which utilizes differential absorption at the oxygen A band to make the atmosphere encode propagation distance on a one-way beam is discussed. This system's principal features are covertness and low power requirements, though its range resolution is comparable to conventional two-way systems. A laser thermally tuned to an oxygen resonance at 760.45 nm was modulated through the line at 1 KHz, and the dropouts associated with passage through the oxygen line were seen at different distances by employing a small photodiode with a transimpedance amplifier. Within the 1/e length of 33 m associated with this particular line, the dropout width was observed to be largely invariant, whereas the depth of dropouts varied with distance as expected.

Paper Details

Date Published: 1 May 1990
PDF: 7 pages
Proc. SPIE 1219, Laser Diode Technology and Applications II, (1 May 1990); doi: 10.1117/12.18290
Show Author Affiliations
Robert J. Smith, Ball Aerospace Systems Group (United States)


Published in SPIE Proceedings Vol. 1219:
Laser Diode Technology and Applications II
Dan Botez; Luis Figueroa, Editor(s)

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