title: Generation of square or hexagonal 16-QAM signals using a dual-drive IQ modulator driven by binary signals.
abstract: We propose a simple square or hexagonal 16-QAM signal generation technique using a commercially available dual-drive IQ modulator driven by four binary electrical signals with properly designed amplitudes. We analytically derive the required driving signal amplitudes for square and hexagonal 16-QAM and characterize its implementation penalty. Polarization-multiplexed (PM)-16-QAM signals at 28 Gbuad are experimentally demonstrated and stable performance is achieved with simple bias control.
authors.affiliation: Photonics Research Center, Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong. nechoyan@gmail.com
authors.forename: Shuangyi
authors.initials: S
authors.lastname: Yan
authors.forename: Xuan
authors.initials: X
authors.lastname: Weng
authors.forename: Yuliang
authors.initials: Y
authors.lastname: Gao
authors.forename: Chao
authors.initials: C
authors.lastname: Lu
authors.forename: Alan Pak Tao
authors.initials: AP
authors.lastname: Lau
authors.forename: Yu
authors.initials: Y
authors.lastname: Ji
authors.forename: Lei
authors.initials: L
authors.lastname: Liu
authors.forename: Xiaogeng
authors.initials: X
authors.lastname: Xu
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D016247:Information Storage and Retrieval / Q000379:methods*; D008962:Models, Theoretical; D055096:Optical Devices; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D013685:Telecommunications / Q000295:instrumentation*