5 September 2000 Extremely low beam divergence illumination system for laser radar applications
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Abstract
Physical Optics Corporation (POC) is developing an innovative light illumination system for a continuous wave imaging laser radar that is being investigated at the Army Research Laboratory. The illumination system will combine the output power from a number of laser diodes into one highly collimated beam with a divergence of three angular minutes. This will provide a 10-m diameter illumination spot at a distance of 5 km, and therefore, a high-power illumination field at the object of interest. The illumination system consists of several fiber-coupled laser diodes, mechanical and optical assemblies for focusing light from every fiber to a collimator focus point, and a non-imaging beam combiner-collimator with 180 degree acceptance aperture. The outgoing clear aperture of the combiner-collimator element is about 80 mm; overall the entire illuminator is compact, light-weight, and cost- effective in mass production.
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Il'ya P. Agurok, Il'ya P. Agurok, Barry L. Stann, Barry L. Stann, Zoltan G. Sztankay, Zoltan G. Sztankay, } "Extremely low beam divergence illumination system for laser radar applications", Proc. SPIE 4035, Laser Radar Technology and Applications V, (5 September 2000); doi: 10.1117/12.397804; https://doi.org/10.1117/12.397804
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