G. M. Saridis, S. Peng, Y. Yan, A. Aguado, B. Guo, M. Arslan, C. Jackson, W. Miao, N. Calabretta, F. Agraz, S. Spadaro, G. Bernini, N. Ciulli, G. Zervas, R. Nejabati, D. Simeonidou, “LIGHTNESS: A Function-Virtualizable Software Defined Data Center Network with All-Optical Circuit/Packet Switching”, to appear in IEEE Journal on Lightwave Technology, 2016