Yb-Doped and Hybrid-Structured Solid Photonic Bandgap Fibers and Linearly-Polarized Fiber Lasers Oscillating above 1160 nm. - Masahiro Kashiwagi; Katsuhiro Takenaga; Kentaro Ichii; Tomoharu Kitabayashi; Shoji Tanigawa; Kensuke Shima; Shoichiro Matsuo; Munehisa Fujimaki; Kuniharu Himeno (IEICE Trans. Electron., 2011)

Thermally expanded core fiber with a 4-μm mode field diameter suitable for low-loss coupling with silicon photonic devices. - Takuya Oda; Keisuke Hirakawa; Kentaro Ichii; Satoshi Yamamoto; Kazuhiko Aikawa (OFC, 2017)

Side-view Rotational Alignment Method for Trench-assisted 4-core Fibers. - Masaki Ohzeki; Yusuke Sasaki; Katsuhiro Takenaga; Kentaro Ichii; Kazuhiko Aikawa (OFC, 2022)

Estimating Crosstalk Between Diagonal Cores in Four-Core Fibers with Square Lattice Structure. - Mayu Nakagawa; Masaki Ohzeki; Yusuke Sasaki; Katsuhiro Takenaga; Kentaro Ichii (OECC/PSC, 2022)

Multi-Core Fiber Link with Its Polarity Management in View. - Takuya Oda; Osamu Kikuchi; Katsuhiro Takenaga; Kentaro Ichii (OECC/PSC, 2022)

Characteristics of Over 600-km-Long 4-core MCF Drawn from a Single Preform. - Shota Kajikawa; Tsubasa Saito; Katsuhiro Takenaga; Kentaro Ichii (OFC, 2023)

Loss performance of field-deployed high-density 1152-channel link constructed with 4-core multicore fiber cable. - Takuya Oda; Shota Kajikawa; Katsuhiro Takenaga; Okimi Mukai; Daiki Takeda; Nikhil Angra; Usman Nasir; Jongchul Park; Jing Zhang; Victor Kopp; Daniel Neugroschl; Kentaro Ichii (OFC, 2023)

Development of Four-Core MCFs with Standard Cladding Diameter from High-Core-Count MCFs. - Kazuhiko Aikawa; Takuya Oda; Shota Kajikawa; Kohei Ozaki; Mayu Iizuka; Katsuhiro Takenaga; Akito Nishimura; Kentaro Ichii (OFC, 2024)

High-Density Weakly-Coupled 4-core MCF with 160-μm Coating for O-band Application. - Shota Kajikawa; Mayu Iizuka; Takuya Oda; Katsuhiro Takenaga; Kentaro Ichii (OFC, 2024)

16-core MCF with standard-coating-diameter for 1, 600 Gbps data center communication. - Shota Kajikawa; Ryota Kaji; Katsuhiro Takenaga; Takuya Oda; Kentaro Ichii (OFC, 2025)