title: Combined utilization of partial-response coding and equalization for high-speed WDM-PON with centralized lightwaves.
abstract: In this paper, we investigate the transmission impairments in a high-speed single-feeder wavelength-division-multiplexed passive optical network (WDM-PON) employing low-bandwidth upstream transmitter. A 1-GHz reflective semiconductor optical amplifier (RSOA) is operated at the rates of 10 Gb/s and 20 Gb/s in the proposed WDM-PON. Since the system performance is seriously limited by its uplink in both capacity and reach owing to inter-symbol interference and reflection noise, we present a novel technique with simultaneous capability of spectral efficiency enhancement and transmission distance extension in the uplink via coding and equalization that exploit the principles of partial-response (PR) signal. It is experimentally demonstrated that the proposed system supports the delivery of 10 Gb/s and 20 Gb/s upstream signals over 75-km and 25-km bidirectional fiber, respectively. The configuration of PR equalizer is optimized for its best performance-complexity trade-off. The reflection tolerance of 10 Gb/s and 20 Gb/s channels is improved by 8 dB and 6 dB, respectively, with PR coding. The proposed cost-effective signal processing scheme has great potential for the next-generation access networks.
authors.affiliation: National ICT Australia, Level 2, Electrical and Electronic Engineering Department, University of Melbourne, Parkville, Victoria 3010, Australia. q.guo@pgrad.unimelb.edu.au
authors.forename: Qi
authors.initials: Q
authors.lastname: Guo
authors.forename: An V
authors.initials: AV
authors.lastname: Tran
mesh_terms: D003195:Computer Communication Networks / Q000295:instrumentation*; D044962:Data Compression / Q000379:methods*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D055096:Optical Devices; D013685:Telecommunications / Q000295:instrumentation*