Ultra-wide dense wavelength division multiplexing and ultra-high channel capacity based outdoor free space/optical wireless system applications in heavy atmospheric channel condition

Abstract This paper has clarified the simulation performance study of ultra-wide dense wavelength division multiplexing and ultra-high channel capacity based outdoor free space/optical wireless system applications in heavy atmospheric channel condition. We have demonstrated that the OWC channel can be reached to 20 km transmission distance with suitable signal to noise ratio while FSO channel can be reached to 250 m with minimum bit error rate through the use of BPSK modulation scheme. This work attempts to study the performance of UW-DWDM optical wireless communication (OWC) and free-space optical (FSO) channels under fog conditions using BPSK and NRZ-OOK modulation. The dense fog density level has bad effects on the performance of both OWC and FSO communication channels. The FSO/OWC communication channels performance is studied under light/thick/dense fog density levels. Non-return to zero (on–off keying (NRZ-OOK) and binary phase shift keying (BPSK) modulation schemes are applied through the FSO/OWC communication channel. Ultra-wide dense wavelength division multiplexing channels are employed to study the channel data rate capacity.