Vertical Optical Fiber Assembly on Silicon Photonic Chips using 3D-Curved Silicon Waveguide Couplers. - Youichi Sakakibara; Tomoaki Kiriyama; Tomoya Yoshida; Yuki Atsumi; Emiko Omoda; Katsuhiro Iwasaki; Takashi Kato (OFC, 2020)

Free-Space Coupling Type Fan-in/Fan-out Device for 4-Core Fiber with Low Insertion Loss. - Tomoaki Kiriyama; Katsuhiro Iwasaki; Katsuya Kito; Takashi Kato (OFC, 2022)

Core-to-Core Switching Module for 4-Core MCFs Using Silicon Photonics Matrix Switch Incorporating Silicon Vertically Curved Optical Coupler. - Tomoya Yoshida; Yuki Atsumi; Emiko Omoda; Katsuya Kito; Katsuhiro Iwasaki; Yusuke Kinoshita; Tomoaki Kiriyama; Ryotaro Konoike; Keijiro Suzuki; Ryosuke Matsumoto; Takashi Inoue; Kazuhiro Ikeda; et al. (OFC, 2023)

18,090-km 2-core Fiber Transmission Using Circulatory Directional Fan-in/Fan-out Devices. - Daiki Soma; Shohei Beppu; Lídia Galdino; Michael Lorenz; Qiulin Ma; Katsuhiro Iwasaki; Seiya Sumita; Kosuke Komatsu; Daniel J. Elson; Tomoaki Kiriyama; Katsuya Kito; Keito Kitamura; et al. (OFC, 2024)