Title :
Studies of OFDM signal for broadband optical access networks
Author :
Chow, C.W. ; Yeh, C.H. ; Wang, C.H. ; Wu, C.L. ; Chi, S. ; Lin, Chinlon
Author_Institution :
Dept. of Photonics, Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
Using orthogonal-frequency-division-multiplexing (OFDM) format for passive optical network (PON) is a subject of great interest for recent research works. OFDM signal has high spectral efficiency, high tolerance to the fiber chromatic dispersion and the high flexibility on both multiple services provisioning and dynamic bandwidth allocation. In this paper we study the use of OFDM signals for optical access networks, including carrier distributed PON, heterogeneous optical wired/wireless network and a 100 Gb/s OFDM-PON. We first quantify the performance of the OFDM signal when subjected to the noise produced by two different Rayleigh backscattering (RB) components that are present in the carrier-distributed PON. Then, based on these results, we also study the possibility of using OFDM for signal remodulation in a long-reach (LR)-PON. We propose carrier-distributed OFDM PONs using a dual-feeder fiber architecture and wavelength-shifting to mitigate the RB noise. Afterwards, we propose heterogeneous optical wired/wireless access networks, combining 10 Gb/s PON and 10 Gb/s OFDM radio-over-fiber (ROF) network. Finally, we propose a 100 Gb/s OFDM-PON using subcarrier multiplexing (SCM).
Keywords :
OFDM modulation; Rayleigh scattering; backscatter; broadband networks; optical fibre networks; radio-over-fibre; OFDM radio-over-fiber network; OFDM signal; OFDM-PON; Rayleigh backscattering; bandwidth allocation; broadband optical access networks; carrier distributed PON; dual-feeder fiber architecture; fiber chromatic dispersion; heterogeneous optical wired network; heterogeneous optical wireless network; orthogonal-frequency-division-multiplexing; passive optical network; signal remodulation; subcarrier multiplexing; wavelength-shifting; Bandwidth; Chromatic dispersion; Costs; OFDM; Optical fiber networks; Optical network units; Optical noise; Passive optical networks; Wavelength division multiplexing; Wireless networks; passive optical networks (PONs), orthogonal frequency division multiplex (OFDM), Rayleigh backscattering, heterogeneous wired/wireless network;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
DOI :
10.1109/JSAC.2010.100805