Yan Shuangyi, Weng Xuan, Gao Yuliang, Lu Chao, Lau Alan Pak Tao, Ji Yu, Liu Lei, Xu Xiaogeng
Photonics Research Center, Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
Opt Express. 2012 Dec 17;20(27):29023-34. doi: 10.1364/OE.20.029023.
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.
我们提出了一种简单的方形或六边形16-QAM信号生成技术，该技术使用市售的双驱动IQ调制器，由具有适当设计幅度的四个二进制电信号驱动。我们通过分析得出方形和六边形16-QAM所需的驱动信号幅度，并对其实现代价进行了表征。实验证明了28 Gbaud的偏振复用（PM）-16-QAM信号，并通过简单的偏置控制实现了稳定的性能。
