Fi-Wi optical communication system based on WDM technique in fog conditions

In this paper, a fiber-wireless optical communication system is designed and investigated under foggy weather conditions via OptiSystem ver. 7. Wavelength division multiplexing (WDM) is used to enhance the capacity of the data transmission. The WDM technique was used to transmit data over the Fi-Wi link. Fog poses an obstacle to terrestrial optical communications using FSO technology because fog particles weaken the signal and scatter light during transmission. The simulation proceeded under foggy conditions. The simulation system is designed with eight channels capable of transmitting data at 5 Gb/s for each channel. The frequencies were selected (193.1, 193.2, 193.3, 193.4, 193.5, 193.6, 193.7, and 193.8 THz) as carrier waves. The system performance is tested in terms of Q-factor and BER. The simulation system is a mimic to compare the power source and data rates. The system is characterized by a low bit error rate and a high quality factor at maximum power. The system was implemented by sending data at rates of 1, 2.5, and 5 Gb/s. It was observed that the Q-factor decreases with an increase in the transmission rate. A comparison was made between RZ and NRZ pulse generating. It was noticed that when using RZ, the Q-factor increases and the bit error rate decreases.