An Optical FDM-Based Self-Healing Ring Network Employing Arrayed Waveguide Grating Filters and EDFA's with Level Equalizers. - Hiromu Toba; Kazuhiro Oda; Kyo Inoue; Kiyoshi Nosu; Tsutomu Kitoh (IEEE J. Sel. Areas Commun., 1996)

160-Gbit/s Full Channel Optical Time-Division Demultiplexer Based on SOA-Array Integrated PLC and Its Application to OTDM Transmission Experiment. - Ippei Shake; Hidehiko Takara; Ikuo Ogawa; Tsutomu Kitoh; Minoru Okamoto; Katsuaki Magari; Takuya Ohara; Satoki Kawanishi (IEICE Trans. Commun., 2005)

Wide passband tandem MZI-synchronized AWG employing mode converter and multimode waveguide. - Manabu Oguma; Shin Kamei; Tsutomu Kitoh; Toshihiko Hashimoto; Yohei Sakamaki; Mikitaka Itoh; Hiroshi Takahashi (IEICE Electron. Express, 2010)

Wide-bandwidth, low-waveguide-width-sensitivity InP-based multimode interference coupler designed by wavefront matching method. - Takeshi Fujisawa; Tsutomu Kitoh; Kei Watanabe; Kenya Suzuki; Masaki Kotoku; Hiroshi Takahashi (IEICE Electron. Express, 2011)