Abstract :
Three optical filter types namely Bessel, Gaussian and Rectangular has been used to evaluate the performance of 16 channels WDM system transmitting over FSO. The best fitting band pass filter however is found Bessel according to the results revealed for transmitting 2.S Gbps bit rate in 2km distance. Moreover, based on various turbulences the effects of atmospheric attenuation were examined using a Bessel optical filter. The highest tolerable transmission interval however found for high, moderate and low turbulence is 1.2, 1.7 and 2 km, respectively. In the last-mile link span the eye diagrams demonstrated no detection at the receiver part for high turbulence. There is adequate eye opening with the Q factor of 14.6689 and 7.2420 respectively, for low and moderate turbulence.
