LD Redundancy System Using Polarization Components for a Submarine Optical Transmission System. - Shunsuke Tsutsumi; Yasutaka Ichihashi; Masatayo Sumida; Huruo Kano (IEEE J. Sel. Areas Commun., 1984)

Repeater Fault Location for a Submarine Optical Fiber Cable Transmission System. - Yukio Kobayashi; Yasutaka Ichihashi (IEEE Trans. Commun., 1984)