title: Phase Conjugated and Transparent Wavelength Conversions of Nyquist 16-QAM Signals Employing a Single-Layer Graphene Coated Fiber Device.
abstract: We fabricate a nonlinear optical device based on a fiber pigtail cross-section coated with a single-layer graphene grown by chemical vapor deposition (CVD) method. Using the fabricated graphene-assisted nonlinear optical device and employing Nyquist 16-ary quadrature amplitude modulation (16-QAM) signal, we experimentally demonstrate phase conjugated wavelength conversion by degenerate four-wave mixing (FWM) and transparent wavelength conversion by non-degenerate FWM in graphene. We study the conversion efficiency as functions of the pump power and pump wavelength and evaluate the bit-error rate (BER) performance. We also compare the time-varying symbol sequence for graphene-assisted phase conjugated and transparent wavelength conversions of Nyquist 16-QAM signal.
authors.affiliation: Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China.
authors.forename: Xiao
authors.initials: X
authors.lastname: Hu
authors.affiliation: College of Chemistry and Molecular Science, Wuhan University, Wuhan 430074, Hubei, China.
authors.forename: Mengqi
authors.initials: M
authors.lastname: Zeng
authors.affiliation: Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China.
authors.forename: Yun
authors.initials: Y
authors.lastname: Long
authors.affiliation: Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing 100871, China.
authors.forename: Yixiao
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing 100871, China.
authors.forename: Kaiheng
authors.initials: K
authors.lastname: Zou
authors.affiliation: State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing 100871, China.
authors.forename: Fan
authors.initials: F
authors.lastname: Zhang
authors.affiliation: College of Chemistry and Molecular Science, Wuhan University, Wuhan 430074, Hubei, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Fu
authors.affiliation: Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Wang