title: Energy-efficient WDM-OFDM-PON employing shared OFDM modulation modules in optical line terminal.
abstract: We propose and experimentally demonstrate a scheme to improve the energy efficiency of wavelength division multiplexing - orthogonal frequency division multiplexing - passive optical networks (WDM-OFDM-PONs). By using an N × M opto-mechanic switch in optical line terminal (OLT), an OFDM modulation module is shared by several channels to deliver data to multiple users with low traffic demands during non-peak hours of the day, thus greatly reducing the number of operating devices and minimizing the energy consumption of the OLT. An experiment utilizing one OFDM modulation module to serve three optical network units (ONUs) in a WDM-OFDM-PON is performed to verify the feasibility of our proposal. Theoretical analysis and numerical calculation show that the proposed scheme can achieve a saving of 23.6% in the energy consumption of the OFDM modulation modules compared to conventional WDM-OFDM-PON.
authors.affiliation: State Key Lab of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Hu
authors.forename: Liang
authors.initials: L
authors.lastname: Zhang
authors.forename: Pan
authors.initials: P
authors.lastname: Cao
authors.forename: Kongtao
authors.initials: K
authors.lastname: Wang
authors.forename: Yikai
authors.initials: Y
authors.lastname: Su
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D008027:Light; D055617:Micro-Electrical-Mechanical Systems / Q000295:instrumentation*; D008962:Models, Theoretical; D055096:Optical Devices; D012542:Scattering, Radiation; D013685:Telecommunications / Q000295:instrumentation*