Single-Channel 1.28 Tbit/s-525 km DQPSK Transmission Using Ultrafast Time-Domain Optical Fourier Transformation and Nonlinear Optical Loop Mirror. - Pengyu Guan; Hans Christian Hansen Mulvad; Yutaro Tomiyama; Toshiyuki Hirano; Toshihiko Hirooka; Masataka Nakazawa (IEICE Trans. Commun., 2011)