title: Tunable optical frequency comb enabled scalable and cost-effective multiuser orthogonal frequency-division multiple access passive optical network with source-free optical network units.
abstract: We propose and experimentally demonstrate a multiuser orthogonal frequency-division multiple access passive optical network (OFDMA-PON) with source-free optical network units (ONUs), enabled by tunable optical frequency comb generation technology. By cascading a phase modulator (PM) and an intensity modulator and dynamically controlling the peak-to-peak voltage of a PM driven signal, a tunable optical frequency comb source can be generated. It is utilized to assist the configuration of a multiple source-free ONUs enhanced OFDMA-PON where simultaneous and interference-free multiuser upstream transmission over a single wavelength can be efficiently supported. The proposed multiuser OFDMA-PON is scalable and cost effective, and its feasibility is successfully verified by experiment.
authors.affiliation: Key Laboratory of Optical Fiber Sensing and Communication Networks (Ministry of Education), and School of Communication and Information Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China.
authors.forename: Chen
authors.initials: C
authors.lastname: Chen
authors.forename: Chongfu
authors.initials: C
authors.lastname: Zhang
authors.forename: Deming
authors.initials: D
authors.lastname: Liu
authors.forename: Kun
authors.initials: K
authors.lastname: Qiu
authors.forename: Shuang
authors.initials: S
authors.lastname: Liu