Transporting RF Signals over Free-Space Optical Links

摘要

Free space optics (FSO) is a technology that uses modulated optical beams to transmit information line-of-sightthrough the atmosphere. To date, the primary focus of FSO research and development has been toward the transmissionof digital signals, primarily for “last mile” applications. This paper reports the use of FSO to transport modulated radiofrequency (RF) analog signals, together with an investigation of key performance measures. Results indicate minimal RFsignal distortion when transmitted over FSO. The advantages of using FSO include increased security andinsusceptibility to electromagnetic interference (EMI).