采用单层石墨烯包覆光纤器件的奈奎斯特16-QAM信号的相位共轭和透明波长转换

Phase Conjugated and Transparent Wavelength Conversions of Nyquist 16-QAM Signals Employing a Single-Layer Graphene Coated Fiber Device.

作者信息

Hu Xiao, Zeng Mengqi, Long Yun, Liu Jun, Zhu Yixiao, Zou Kaiheng, Zhang Fan, Fu Lei, Wang Jian

机构信息

Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China.

College of Chemistry and Molecular Science, Wuhan University, Wuhan 430074, Hubei, China.

出版信息

Sci Rep. 2016 Mar 2;6:22379. doi: 10.1038/srep22379.

DOI:10.1038/srep22379

PMID:26932470

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4773766/

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.

摘要

我们基于通过化学气相沉积（CVD）方法生长的单层石墨烯涂覆的光纤尾纤横截面制造了一种非线性光学器件。使用制造的石墨烯辅助非线性光学器件并采用奈奎斯特16进制正交幅度调制（16-QAM）信号，我们通过简并四波混频（FWM）实验证明了相位共轭波长转换，并通过石墨烯中的非简并FWM实验证明了透明波长转换。我们研究了转换效率与泵浦功率和泵浦波长的函数关系，并评估了误码率（BER）性能。我们还比较了奈奎斯特16-QAM信号的石墨烯辅助相位共轭和透明波长转换的时变符号序列。