Distributed Feedback Laser Diode and Module for CATV Systems. - Akira Takemoto; Hitoshi Watanabe; Yasuo Nakajima; Yasushi Sakakibara; Syoichi Kakimoto; Junichiro Yamashita; Tatsuo Hatta; Yoshio Miyake (IEEE J. Sel. Areas Commun., 1990)