10-Gbit/s Bidirectional and 20-Gbit/s Unidirectional 2-ch Wireless Data Transmission System Using 120-GHz-Band Finline Orthomode Transducers. - Jun Takeuchi; Akihiko Hirata; Hiroyuki Takahashi; Naoya Kukutsu; Yoshiaki Yamada; Kei Kitamura; Mitsuhiro Teshima (IEICE Trans. Electron., 2014)

Novel ODU4 Path Protection Without Bit Disruption for Low Latency and Resilient Core/Metro Network. - Kei Kitamura; Fumikazu Inuzuka; Takafumi Tanaka; Akira Hirano (ECOC, 2018)

Dynamic Optical Path Provisioning for Alien Access Links: Architecture, Demonstration, and Challenges. - Hideki Nishizawa; Takeo Sasai; Takeru Inoue; Kazuya Anazawa; Toru Mano; Kei Kitamura; Yoshiaki Sone; Tetsuro Inui; Koichi Takasugi (IEEE Commun. Mag., 2023)