An emerging theme in next-generation access research includes seamless wireline-wireless convergence addressed by
Radio-over-Fiber (RoF) technologies. Optical cabling solutions offer the possibility for semi-transparent transport
through the access network microwave to mm-wave radio carriers commonly employed for creating high-capacity
picocell wireless networks, attending present demands from the wireless technologies, with portable/mobile devices
converging with photonics. Advanced RoF techniques can efficiently generate and transport such carriers, and deliver
them to simplified antenna stations or radio access points (RAPs). Thus, they can convey high data rates in
comprehensive modulation formats on multiple-GHz carriers in MMF networks.
Selective mode-launching schemes combined with the use of narrow linewidth optical sources are experimentally
demonstrated to enable broadband RF, microwave and mm-wave transmission in short- and middle-reach distances over
silica-based multimode optical fibers (MMFs); and are reviewed in this paper. However, arbitrary operating conditions,
such as the temperature dependence in the fiber link, impose a great challenge for the extension of the RoMMF
technology. Temperature impairment characterization is analyzed over the broadband transmission bands that are
present, under certain operating link conditions, in the frequency response performance of MMF to support multiple GHz
carrier delivering schemes, thus contributing to fault link prevention.