Comparative Analysis of Free Space Optical Communication System for Various Optical Transmission Windows under Adverse Weather Conditions

Free Space Optics (FSO) link offers gigabit per second data rates with less system complexity. However, the availability of link under various atmospheric conditions is a major concern. As these links are highly weather dependent, thus increase in signal attenuation under these conditions reduces the link efficiency. This paper evaluates the effects of bad weather conditions on FSO link having range 500 meters up to attenuation of 70 dB/km. The suitability of three optical transmission windows that are 850 nm, 1310 nm and 1550 nm, with the FSO link is analysed and compared in this work. Simulation parameters such as Quality factor, minimum BER and Eye diagram are taken into consideration. The results of analyzer for various transmission windows are compared to find out the most suitable wavelength of transmitter under adverse weather conditions for reliable communication.