Simple analysis of water-filled hollow-core silica photonic bandgap fiber. - Hirokazu Kubota; Satoki Kawanishi; Masaya Notomi (IEICE Electron. Express, 2009)

Intermodal group velocity dispersion of few-mode fiber. - Hirokazu Kubota; Hidehito Takara; Tadao Nakagawa; Munehiro Matsui; Toshio Morioka (IEICE Electron. Express, 2010)

T-shaped mode coupler for two-mode mode division multiplexing. - Hirokazu Kubota; Hidehiko Takara; Toshio Morioka (IEICE Electron. Express, 2011)

First demonstration of multi-span transmission using phase and amplitude regeneration in PPLN-based PSA. - Takeshi Umeki; Masaki Asobe; H. Takara; Takayuki Kobayashi; Hirokazu Kubota; Hirokazu Takenouchi; Yutaka Miyamoto (OFC/NFOEC, 2013)

Three-mode multi/demultiplexing experiment using PLC mode multiplexer and its application to 2+1 mode bi-directional optical communication. - Hirokazu Kubota; Manabu Oguma; Hidehiko Takara (IEICE Electron. Express, 2013)

Technique for measuring mode power of two-mode fiber. - Atsushi Watase; Hirokazu Kubota; Yuji Miyoshi; Masaharu Ohashi (IEICE Electron. Express, 2013)

Longitudinal fiber parameter measurements of two-mode fiber links by using OTDR. - M. Ohashi; Hirokazu Kubota; Y. Miyoshi; Ryo Maruyama; N. Kuwaki (ECOC, 2014)

Technique for measuring mode power of two-mode fiber II; Experiment. - Hirokazu Kubota; Yuji Miyoshi; Masaharu Ohashi (IEICE Electron. Express, 2014)

Nyquist OTDM scheme using optical root-Nyquist pulse and optical correlation receiver. - Yuji Miyoshi; Hirokazu Kubota; Masaharu Ohashi (IEICE Electron. Express, 2014)

Plug-and-Play Optical Interconnection Using Digital Coherent Technology for Resilient Network Based on Movable and Deployable ICT Resource Unit. - Tetsuro Komukai; Hirokazu Kubota; Toshikazu Sakano; Toshihiko Hirooka; Masataka Nakazawa (IEICE Trans. Commun., 2014)

Nyquist OTDM based on optical correlation detection using impulse response of photo receiver. - Yuji Miyoshi; Hirokazu Kubota; Masaharu Ohashi (APCC, 2015)

Simultaneous measurements of cores in multi-core fibre using OTDR and fan-in/out devices. - M. Ohashi; H. Uemura; Katsuhiro Takenaga; S. Matsuo; Hirokazu Kubota; Y. Miyoshi (ECOC, 2015)

Effective Area Measurement of Few-mode Fibers Using a Variable Aperture in a Far-Field Technique. - Sei-Ichiro Kida; Masaharu Ohashi; Hirokazu Kubota; Yuji Miyoshi (OECC/PSC, 2019)

Mode Rotator for Space-Division Multiplexing Based on an Elliptical Core Two-mode Fiber. - Tsukasa Nakashima; Hirokazu Kubota; Yuji Miyoshi; Masaharu Ohashi (OECC/PSC, 2019)

Prediction of Modal Dispersion of High-Order Mode from Wavelength Dependence of the Mode Field Radius. - Masaharu Ohashi; Tomoya Kawasaki; Hirokazu Kubota; Yuii Mivoshi (OECC/PSC, 2019)

Vibration Monitoring Based on Cascaded-LPFG Fabricated with Heat-Shrinkable Tube. - Yasuhiro Tsutsumi; Masaharu Ohashi; Yuji Miyoshi; Hirokazu Kubota; Ikuo Yamashita (OECC/PSC, 2019)

Nyquist pulse generation scheme using spectrum broadening in highly nonlinear fiber. - Tomoya Yokoi; Yuji Miyoshi; Hirokazu Kubota; Masaharu Ohashi (OECC/PSC, 2019)

Estimating Modal Group Delay Characteristics of Few-Mode Fibres from Fibre Parameters. - Atsushi Nakamura; Masaharu Ohashi; Daisuke Iida; Hirokazu Kubota (ECOC, 2020)

Simultaneous Core and Mode Switch Using Cascaded LPFG Written on Heterogeneous Multicore Fibers. - Hirokazu Kubota; Koki Taguchi; Yuji Miyoshi (OECC/PSC, 2022)