Experimental Study of the Influence of Dust Particle on Link Range of Free Space Laser Communication System for Babylon City in Central Iraq

ABSTRACT Attenuation due to Aerosols (Dust), It restricts the distance of free space optical communication systems (FSO) and limits the availability for line -sight terrestrial link. This work is focused on both sides, the first side focused to monitor the concentrations of particles (dust) in Babylon Governorate during years for the time period between the years 2008 to 2014. It was monitored and studied the dust of six monitoring stations which distributed in the governorate in random form, for comparison purposes and compared with World Health Organization (WHO) standards. The second side focused the effect of Aerosols on the FSO link. The attenuations was studied in the Babylon city in the aerosols phenomena for three selected wavelengths (450, 810, and 1550 nm) for horizontal transmitting range (10 m-3 km).The results show an increase in the annual average deposits of dust during the study period, the amount recommended by the (WHO) standards recommended that dust deposits should not exceed (9 g/m2/month). That is mean the average of dust deposit in Iraq is about Several times greater than the allowable limits. As will as the results showed that the maximum dust deposits were in the Hilla industrial center, while the minimum concentration was in the Hilla agricultural center. The system availability as a function of the range, and indicate that FSO systems can be deployed with reliability in Babylon city of Iraq