| The non-linear optical effect of reflection, absorption and dispersion induced by strong laser transmitting in the atmosphere is analyzed in this paper. And the transmission characteristic of the chief band laser wavelength is studies base on experiment and numeric calculation.The laser intensity continuously decays since the absorption and the dispersion of the dust in the air when transmitting in the atmosphere. The haze, fog, cloud, rain and snow in the air all have serious sideeffect on the transmission of the laser. The linear optical effect of radiation is systematically probed into in this paper, including such problems as reflection, absorption and attenuation, and gives a numerical discussion of radiation descending in the atmosphere. We have achieved the theoretical and empirical equation of the radiation descending base on theoretical and experimental research.The radiation descending character of the 0.53 μm and the 1.06 μm wavelength had been studied base on the simulating the fog and dust environment. It is proved that the transmission of the 1.06μm is stronger than 0.53μm. However, it serious effects the transmission of the 1.06μm wavelength when some big size water drop exiting in the air since the strong absorption of the water.The radiation can transfer longer distance when increase the laser intensity, however too high radiation can induce the breakdown of the air. The transmission of the rear radiation is serious influenced because of the shielding of the plasma. The breakdown and the thermal nonlinear effect is studied in theoretical and experimental aspect. The breakdown threshold of the air and water vapor also had been measure. The threshold of the air is significantly reduced because the influence of the dust and water vapor in air. |
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