可见光范围内大气层对激光束衰减效应的模拟与分析

Mohammed Kamal Saleh, Thair Abdulkareem, Khalil Al-Aish
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引用次数: 0

摘要

摘要:在医学、军事和科学等激光应用和领域中,激光到达目标的功率和最终光斑的大小是非常重要的要求,因此研究激光在大气中的传播是一个非常重要的课题。激光束在大气中的传播受到几个衰减过程的影响,这些衰减过程会耗尽能量并使光束扩展。通过对电磁波谱可见区域(400 ~ 700nm)内自由电子激光器的仿真结果发现,衰减随波长的减小而增大。与在无雨雪的正常天气条件下传播相比,在雨雪天气下激光传播会导致非常大的功率损失。大气湍流很大程度上取决于温度的变化,因此湍流随海平面的高度而减少,这使得激光在高海拔地区工作,如平流层,是一个很好的选择,效果更好。
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Simulation and Analysis the Attenuation Effect of Atmospheric Layers on a Laser Beam Within the Visible Range
Abstract: The power and the size of the final spot of the laser beam reaching the target are very important requirements in most of the laser applications and fields such as medical, military, and scientific, so studying laser propagation in the atmosphere is a very important topic. The propagation of the laser beam through the atmosphere is subject to several attenuation processes that deplete the power and expand the beam. Through the simulation results of the free electron laser within the visible region of the electromagnetic spectrum (400-700nm), it was found that the attenuation increases with decreasing wavelength. Laser propagation in the presence of rain and snow leads to a very large loss of power compared to propagation in normal weather conditions free of rain and snow. Atmosphere turbulence depends largely on changes in temperature, so the turbulence decreases with altitude from sea level, which makes laser work at high altitudes, such as the stratosphere, a good option with better results.  
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