Temperature rise in objects due to optical focused beam through atmospheric turbulence near ground and ocean surface

Matthew Stoneback; Akira Ishimaru; Colin ReinhardtYasuo Kuga

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Temperature rise in objects due to optical focused beam through atmospheric turbulence near ground and ocean surface

机译：Temperature rise in objects due to optical focused beam through atmospheric turbulence near ground and ocean surface

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摘要

We consider an optical beam propagated through the atmosphere and incident on an object causing a temperature rise. In clear air, the physical characteristics of the optical beam transmitted to the object surface are influenced primarily by the effect of atmospheric turbulence, which can be significant near the ground or ocean surface. We use a statistical model to quantify the expected power transfer through turbulent atmosphere and provide guidance toward the threshold of thermal blooming for the considered scenarios. The bulk thermal characteristics of the materials considered are used in a thermal diffusion model to determine the net temperature rise at the object surface due to the incident optical beam. These results of the study are presented in graphical form and are of particular interest to operators of high power laser systems operating over large distances through the atmosphere. Numerical examples include a CO_2 laser (λ = 10.6 μm) with: aperture size of 5 cm, varied pulse duration, and propagation distance of 0.5 km incident on 0.1-mm copper, 10-mm polyimide, 1-mm water, and 10-mm glass/resin composite targets. To assess the effect of near ground/ocean laser propagation, we compare turbulent (of varying degrees) and nonturbulent atmosphere.

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来源
《Optical Engineering》 |2013年第3期|036001-1-036001-8|共8页
作者
Matthew Stoneback; Akira Ishimaru; Colin ReinhardtYasuo Kuga;
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作者单位

University of Washington, Department of Electrical Engineering, Campus Box 352500, Seattle, Washington 98195;

Atmospheric Propagation Branch, US Navy SSC-PAC, San Diego, California;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类计量学;
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Temperature rise in objects due to optical focused beam through atmospheric turbulence near ground and ocean surface

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