Experimental Demonstration of Cascadable PPLN-Based Inter-Band Wavelength Converters for Band-Switchable Multi-Band Optical Cross-Connect. - Haruka Minami; Kenta Hirose; Takafumi Fukatani; Masahiro Nakagawa; Takeshi Seki; Shimpei Shimizu; Takayuki Kobayashi; Takushi Kazama; Koji Enbutsu; Kei Watanabe; Takeshi Umeki; Takashi Miyamura; et al. (OFC, 2023)