Paper Title
Multi-Beam Hybridwdm-RoF Free Space Optical Communication Systemq

Free space optical (FSO) communication provides secure communication with remarkable unlimited bandwidth for various types of networks such as broad band communication. Hybrid Wavelength Division Multiplexing RoF-FSO system is presented and an additional millimeter wave is used with Coarse Wavelength Division Multiplexing, CWDM and Dense Wavelength Division Multiplexing, DWDM channels to fulfill the demand of bandwidth and data rate. In this system, eight DWDM and CWDM channels is transmitted along with radio frequency through six beams whose corresponding spacing of channel is 0.8 nm and 20 nm, respectively. The proposed system is designed with data rate of 5 Gbps for 12 users along a link range of 30 Km. The performance of this system are analyzed with the help of BER and eye diagrams. Keywords - WDM (Wavelength Division Multiplexing), RoF (radio over fiber), Coarse Wavelength Division Multiplexing (CWDM) and Dense Wavelength Division Multiplexing (DWDM)