Experimental Investigation on a Radio-on-free-space Optical System Suitable for Provision of Ubiquitous Wireless Services

Recent advancements in microwave and terahertz photonics technologies has led to development of innovative advanced wireless communications systems. One of the emerging promising technologies is Radio-on-Free-Space Optical (RoFSO) system described in this paper. RoFSO is achieved by combining Radio-over-Fiber (RoF) technique and free-space optical (FSO) communication technology using seamless connection of free-space and optical fiber. With this system it is possible to transmit simultaneously multiple RF signals representing different wireless services through free-space using WDM technique. In this paper we describe the design concept of the RoFSO system and highlight the performance evaluation based on the transmission of the various wireless services signals transmitted over it. The results obtained show satisfactory performance and demonstrate potential of the RoFSO system as a suitable platform for provision of ubiquitous wireless services. Moreover the link design of the RoFSO system and application scenario as an ubiquitous network are considered based on the experimental result.