thermal blooming


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thermal blooming

[′thər·məl ′blüm·iŋ]
(optics)
The phenomenon of self-defocusing in certain weakly absorbing media; it is prominent, for example, in the propagation of high-power infrared laser beams through the atmosphere.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
HELWSs operating in the littoral environment encounter thermal blooming, a phenomenon that limits the atmospheric propagation of a high energy laser beam.
At many wavelengths and under specific conditions of air pressure and humidity the intense heating of the air leads to a phenomenon known as "thermal blooming", which tends to diffuse the beam's energy.
Should experiments planned for the '90s establish that such a wavelength does not exist, another approach is being studied to circumvent thermal blooming and the Raman effect.