Simulation and Analysis   the Attenuation Effect of Atmospheric Layers on a Laser Beam Within the Visible Range

Thair Abdulkareem Khalil Al-Aish; Mohammed Kamal Saleh

doi:10.30526/36.3.3093

Authors

Thair Abdulkareem Khalil Al-Aish Department of Physics, College of Education for Pure Sciences ibn Al-Haitham, University of Baghdad, Baghdad, Iraq.
Mohammed Kamal Saleh Department of Physics, College of Education for Pure Sciences Ibn Al-Haitham, University of Baghdad, Baghdad, Iraq.

DOI:

https://doi.org/10.30526/36.3.3093

Keywords:

FEL, Attenuation Coefficient, M2, Gaussian Beam, Atmosphere Turbulence

Abstract

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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