Field trial of 1.6 Tb/s (40 channels×40 Gb/s) NRZ signals over 511 km standard single mode fiber using conventional optical amplifiers. - Sang Soo Lee; Hyunwoo Cho; Sang-Kyu Lim; Kyeong-Mo Yoon; Yong-Gi Lee; Jesoo Ko (ICC, 2005)

Performance of an APSK Receiver with Electronic Switches for the Reduction of SPM-Induced Impairments. - Sang-Gyu Park; Jesoo Ko (IEICE Trans. Commun., 2007)