FSO for High Capacity Optical Metro and Access Networks

Abstract

Free-space optic (FSO) with optical metro and access networks should couple very efficiently since they work in the same wavelengths with a transparent link. Moreover, coherent detection with advanced modulation formats can fully utilize the bandwidth and increase the transmission capacity of FSO links. This chapter considers several optical wireless systems used in metro and access networks. Advanced modulation formats and Nyquist pulse-shaping technology are discussed for future implementations of optical access networks. A fully ultra broadband optical wireless link in a building to building scenario is demonstrated. Moreover, an innovative bi-directional ultra-dense wavelength division multiplexing passive optical network (UDWDM-PON) based on advanced modulation formats and Nyquist pulse shaping in a hybrid fibre plus FSO is experimentally demonstrated.