A single-channel, 1.6 Tbit/s 32 QAM coherent pulse transmission over 150 km with RZ-CW conversion and FDE techniques. - David Odeke Otuya; Keisuke Kasai; Toshihiko Hirooka; Masato Yoshida; Masataka Nakazawa; Tokutaka Hara; Satoshi Oikawa (OFC/NFOEC, 2013)

Novel ultrafast TDM demultiplexing scheme using orthogonality in coherent Nyquist pulses. - Koudai Harako; David Odeke Otuya; Keisuke Kasai; Toshihiko Hirooka; Masataka Nakazawa (ECOC, 2014)

A single-channel 960 Gbit/s 64 QAM orthogonal TDM transmission with a spectral efficiency of 10.0 bit/s/Hz using coherent Nyquist pulses. - David Odeke Otuya; Koudai Harako; Keisuke Kasai; Toshihiko Hirooka; Masataka Nakazawa (ECOC, 2014)

1.92 Tbit/s, 64 QAM coherent Nyquist pulse transmission over 150 km with a spectral efficiency of 7.5 bit/s/Hz. - David Odeke Otuya; Keisuke Kasai; Toshihiko Hirooka; Masato Yoshida; Masataka Nakazawa (OFC, 2014)

Single-channel 1.92 Tbit/s, 64 QAM coherent orthogonal TDM transmission of 160 Gbaud optical Nyquist pulses with 10.6 bit/s/Hz spectral efficiency. - David Odeke Otuya; Koudai Harako; Keisuke Kasai; Toshihiko Hirooka; Masataka Nakazawa (OFC, 2015)