Advanced modulation formats for 400-Gbps short-reach optical inter-connection Xu, Xiaogeng ; Zhou, Enbo ; Liu, Gordon Ning ; Zuo, Tianjian ; Zhong, Qiwen ; Zhang, Liang ; Bao, Yuan ; Zhang, Xuebing ; Li, Jianping ; Li, Zhaohui Abstract Publication: Optics Express Pub Date: January 2015 DOI: 10.1364/OE.23.000492 Bibcode: 2015OExpr..23..492X