title: WDM extended reach passive optical networks using OFDM-QAM.
abstract: In order to reduce the cost for delivering future broadband services, network operators are inclined to simplify the network architectures by integrating the metro and access networks into a single system. Hence, extended reach passive optical networks (ER-PONs) have been proposed. ER-PON usually has four new features: high data rate in both upstream and downstream signals (>1 Gb/s); reach extension to >100 km; a high split ratio (>100); and using wavelength division multiplexing (WDM). In this work, we propose and demonstrate a highly spectral efficient ER-PON using 4 Gb/s OFDM-QAM for both upstream and downstream signals, while achieving a high split-ratio of 256. The ER-PON employs optical components optimized for GPON (bandwidth of approximately 1 GHz) and reaches 100 km without dispersion compensation. Numerical analysis using 16, 64 and 256-QAM OFDM are also performed to study the back-to-back receiver sensitivities and power penalties at different electrical driving ratios.
authors.affiliation: Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 300-10, Taiwan. cwchow@faculty.nctu.edu.tw
authors.forename: Chi-Wai
authors.initials: CW
authors.lastname: Chow
authors.forename: Chien-Hung
authors.initials: CH
authors.lastname: Yeh
authors.forename: Chia-Hsuan
authors.initials: CH
authors.lastname: Wang
authors.forename: Fu-Yuan
authors.initials: FY
authors.lastname: Shih
authors.forename: Ci-Ling
authors.initials: CL
authors.lastname: Pan
authors.forename: Sien
authors.initials: S
authors.lastname: Chi
mesh_terms: D003195:Computer Communication Networks / Q000295:instrumentation*; D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008962:Models, Theoretical; D055095:Optics and Photonics / Q000295:instrumentation*; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*