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Proceedings Paper

Comparison of atmospheric laser propagation between the NIR and MWIR
Author(s): Frank Hanson; Pete Poirier; Delmar Haddock; Dan Kichura; Mark Lasher
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Paper Abstract

We report results from field experiments that have compared laser propagation in the near infrared (NIR) and mid-wave infrared (MWIR) in a variety of atmospheric conditions. Single frequency laser sources at 1.565 μm and 3.603 μm were transmitted through a single common aperture telescope to ensure that each beam was affected by nearly identical turbulence. Tests were performed on a one-way, 1.26 km path over land and on a round-trip, 2 x 1.41 km path that was mostly over water using a broadband retro-reflector. It is expected from theory that scattering and turbulence should have relatively less effect at longer wavelength, however quantitative measurements in real world conditions are important because of the complexity and simplifying assumptions required in the theory. Although communication and laser radar systems that operate in the NIR at ~1.5 μm benefit from well-developed sources and detectors, it is expected that propagation in the MWIR can offer a significant advantage. The objective of this work was to quantify the relative propagation effects under realistic conditions.

Paper Details

Date Published: 20 August 2008
PDF: 9 pages
Proc. SPIE 7090, Atmospheric Optics: Models, Measurements, and Target-in-the-Loop Propagation II, 70900J (20 August 2008); doi: 10.1117/12.796819
Show Author Affiliations
Frank Hanson, SPAWAR Systems Ctr. (United States)
Pete Poirier, SPAWAR Systems Ctr. (United States)
Delmar Haddock, SPAWAR Systems Ctr. (United States)
Dan Kichura, SPAWAR Systems Ctr. (United States)
Mark Lasher, SPAWAR Systems Ctr. (United States)


Published in SPIE Proceedings Vol. 7090:
Atmospheric Optics: Models, Measurements, and Target-in-the-Loop Propagation II
Stephen M. Hammel; Alexander M. J. van Eijk; Mikhail A. Vorontsov, Editor(s)

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