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- W2017473793 abstract "ABSTRACT In propagation of high power laser through atmosphere, the affection to thermal blooming by aerosol is a research field. Thispaper reports the experiment result of thermal blooming effect, which is induced by a group of water particle absorbingenergy of CW Ar+ laser propagating. Our system includesan aerosol box, some right-angle-reflectors. By mean of increasingof the absorption of the particle, we observed the thermal blooming phenomenon of laser interacting with aerosol. When thedensity of droplet in the box increases, the laser beam outputting from the box moves down. And the size at the verticaldirection becomes small because of the convection of air heated by the aerosol absorbing laser energy. When the density ofparticles decreases, the beam will go back to the initial location. The experiment shows that aerosol can induce the thermalblooming of high power laser.Key Words: thermal blooming, aerosol, laser, Ar+, beam 1. INTRODUCTION When the laser beam propagates through the atmosphere, especially near the ground, the affection of aerosol is a mostimportant factor influencing the quality ofpropagating laser. Aerosol will absorb and scatter laser energy. When the power oflaser is high enough, the particle will get a lot of heat energy, and its temperature will rise higher. Because heat transfereffect of conduction of air exists, the heat energy will be transfer into air from the particle, and air will be heated. Then laserwill be influence by air heated. The shape and the direction of laser beam will change. And the thermal blooming action isformed, which is similar to the gas absorption. In order to describe this effect induced by aerosol, the effective absorptioncoefficient of aerosol 1,2,3,4 is used, and the scattering cross-section of air heated by absorbing particle is calculated5'6." @default.
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- W2017473793 date "1998-11-03" @default.
- W2017473793 modified "2023-10-15" @default.
- W2017473793 title "<title>Thermal blooming induced by artificial aerosol with cw laser</title>" @default.
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- W2017473793 doi "https://doi.org/10.1117/12.330210" @default.
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