Development of two source modulation (TSM) to mitigate the atmospheric disturbance in FSO system

Abstract

The Free Space Optical (FSO) communication is also known as Wireless Optical Communication (WOC), Fibreless, or Laser Communication (Lasercom). FSO provides a wide service and requires point-to-point connection between transmitter and receiver at clear atmospheric conditions. The FSO technique uses modulated laser beam to transfer carrying data from a transmitter to a receiver. However, attenuation of the atmosphere due to the instable weather condition is the biggest challenges facing by FSO system. FSO system is sensitive to bad weather condition such as rain, haze, dust fog and turbulence. This conditions will act to attenuate light and could block the light path in the atmosphere [1] [2]. Therefore, overcome this challenges study about weather conditions is needed. This study is focused more on the effects of haze and rain on the FSO system. In order to mitigate this effect, two source modulation technique is used. It is generated by simulation using OptiSystem software.