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.
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.
Thermal blooming is caused by a succession of plasmas, small clouds of ionized gas created by 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.
One of the results of this research is a comprehensive laser propagation model which includes the effects of atmospheric turbulence, molecular and aerosol absorption and scattering as well as thermal blooming.