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Weather Effects Impact on the Optical Pulse Propagation in Free Space

Optical wireless links offer gigabit per second data rates and low system complexity. For ground-space and or terrestrial communication scenarios, these links suffer from atmospheric loss mainly due to fog, scintillation and precipitation. We investigate here the impact of fog, rain and snow effects and evaluate their performance on the basis of attenuation data collected for the optical pulse propagated through the troposphere. I. FSO INTRODUCTION Free-Space Optics (FSO) or optical wireless communication is the concept of transmitting very high bandwidth digital data using laser beam directly through the atmosphere. Recently FSO -links are identified as an attractive alternative to the existing radio links for applications involving ground-to-ground (short and long distance terrestrial links), satellite uplink/downlink, inter- satellite, satellite or deep space probes to ground, ground-to- air/air-to-ground terminal (UAV, HAP etc.). Moreover, growing demands for higher data rates and wider bandwidths from the end user to manipulate multimedia information in the recent years allegorises a challenge for the future Next Generation Networks (NGN). The prime advantages of FSO