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This paper is demonstrating the simulative comparisons and investigation of free-space optical fiber optic (FSO/FO) hybrid link under the effects of clear sky, haze and light rain weather conditions by using phase shift keying (PSK) modulation format with a data rate 40 GB/s at 1550 nm wavelength. An optical amplifier with 40 dB gain is placed before the FSO transmitter to boost the amplitude of a weak signal. A combination of multiple FSO transmitters, erbium-doped fiber (EDF) 3 m and bidirectional dispersion compensating fiber (DCF) 3.2 km are employed to overcome the effect of attenuation in the propagating channel. The performance of the system is evaluated in terms of BER, SNR, Q factor and eye diagrams. It has been observed that the performance of dual-channel hybrid FSO/FO is very robust as compared to conventional FSO/FO systems. While the communication distance with the hybrid link is escalated up to 54 km, 11 km and 5.5 km in a clear sky, haze and light rain climate conditions correspondingly. The satisfying values of BER have been observed as 10 −14 , 10 −11 , and 10 −13  for clear, haze and light rain weather conditions, respectively.

Performance enhancement and analysis of 40 GB/s dual channel hybrid FSO/FO link under diverse weather conditions