On-chip demultiplexing of polarization and wavelength multiplexed OFDM/OQAM 64/128-QAM signals using silicon 2D grating coupler and microring resonators. - Wang, Jian; Gui, Chengcheng; Li, Chao; Yang, Qi; Gao, Dinshan; Sun, Junqiang; Zhang, Xinliang (2014)