Suppression of the Cross-Gain Modulation in Remotely-Pumped EDF/DRA Hybrid Inline Amplifier Systems with Online OTDR for Gain Monitoring. - Hiroto Kawakami; Hiroji Masuda; Kenji Sato; Yutaka Miyamoto (IEICE Trans. Commun., 2005)

High-Performance Distributed Raman Amplification Systems with Limited Pump Power. - Hiroji Masuda; Masahito Tomizawa; Yutaka Miyamoto; Kazuo Hagimoto (IEICE Trans. Commun., 2006)

120.7-Tb/s (7 SDM/180 WDM/95.8 Gb/s) MCF-ROPA un epeatered transmission of PDM-32QAM channels over 204 km. - Hidehiko Takara; Takayuki Mizuno; H. Kawakami; Yutaka Miyamoto; Hiroji Masuda; K. Kitamura; Hirotaka Ono 002; S. Asakawa; Yoshimichi Amma; Keisuke Hirakawa; S. Matsuo; K. Tsujikawa; et al. (ECOC, 2014)

All-optical feedforward automatic gain control scheme for pump power shared erbium-doped fiber amplifiers. - Kokoro Kitamura; Kenta Udagawa; Hiroji Masuda (IEICE Electron. Express, 2016)

Optically Amplified Feedback Circuit with High Improvements in Optical Power Resolution. - Hiroji Masuda; Kokoro Kitamura; Syful Islam; Biswajit Biswas (OECC/PSC, 2019)

First experimental demonstration of all-optical feedforward automatic gain control scheme using a semiconductor optical amplifier. - Kokoro Kitamura; Hiroji Masuda (IEICE Electron. Express, 2019)

Fiber-Optic Temperature Sensing with High Resolution and Stability by Detecting Amplified Spontaneous Emission. - Hiroji Masuda; Biswajit Biswas; Kunihiro Tanaka (OECC/PSC, 2022)

Amplified-spontaneous-emission feedback circuit with wide operating bandwidth and dynamic range. - Biswajit Biswas; Md Golam Barkatul Abrar; Kunihiro Tanaka; Ryuga Harada; Kokoro Kitamura; Hiroji Masuda (IEICE Electron. Express, 2023)