40 Gbps WDM transmission over 1.15 km HC-PBGF using the first InP-based Mach Zehnder modulator at 2 μm. - M. U. Sadiq; Hongyu Zhang; Michael Gleeson; Nan Ye; Brendan Roycroft; Niamh Kavanagh; C. Robert; H. Yang; Kevin Thomas 007; Agnieszka Gocalinska; Zhihong Li; Yong Chen 015; et al. (ECOC, 2015)