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Chapter 9: OFDM for Multimode Fiber Systems - Pg. 325

CHAPTER 9 OFDM for Multimode Fiber Systems Multimode fibers (MMFs) are widely used in local area networks (LANs) and optical interconnects. Many of the installed Ethernet backbones are based on MMFs and operate at data rates of approximately 1 Gb/s. A great deal of research is devoted to upgrading 1 Gb/s Ethernet backbones to 10 Gb/s. Because orthogonal frequency-division multiplexing (OFDM) has shown robustness in a variety of wireless channels, it has been adopted in many communication standards 1,2 including wireless LAN (Wi-Fi), digital video and audio broadcasting standards, digital subscribed loop (DSL), and Worldwide Interoperability for Microwave Access (WiMAX, or IEEE 802.16). It has been shown in previous chapters that OFDM can successfully be applied in long-haul optical transmission systems to deal with chromatic dispersion and polarization mode dispersion. Because the high data rate signal in OFDM is split into many lower data rate substreams, it demonstrates high robustness against different dispersion effects, including multimode dispersion present in MMF links, which is