Quasi-Constant Signal Power Transmission with Low Signal RIN by DRA with Incoherent-Forward and Coherent-Backward Pumps. - Shigehiro Takasaka; Norihiro Ohishi; Satoru Ichihara; Nitidet Thudsalingkarnsakul; Naoya Hojo; Yasuto Tatamida; Junji Yoshida; Sanguan Anantathanasarn; Toshio Kimura (OFC, 2023)