Flexible and scalable PON protection architecture using N: M redundancy toward next generation access network. - Takashi Mitsui; Takeshi Sakamoto; Kazutaka Hara; Naoto Yoshimoto (APCC, 2011)

Ultra Fast Response AC-Coupled Burst-Mode Receiver with High Sensitivity and Wide Dynamic Range for 10G-EPON System. - Kazutaka Hara; Shunji Kimura; Hirotaka Nakamura; Naoto Yoshimoto; Hisaya Hadama (IEICE Trans. Commun., 2011)

Effect of forward error correction on spectral sliced WDM/TDMA-PON system. - Takashi Mitsui; Kazutaka Hara; Masamichi Fujiwara; Junichi Kani; Masashi Tadokoro; Naoto Yoshimoto (IEICE Electron. Express, 2012)

Experimental demonstration of RoF-DAS over WDM-PON with bandpass-sampling and optical TDM techniques. - Takayoshi Tashiro; Kazutaka Hara; Junichi Kani; Naoto Yoshimoto; Katsumi Iwatsuki; Kenji Miyamoto; Tatsuya Nishiumi; Takeshi Higashino; Katsutoshi Tsukamoto; Shozo Komaki (IEICE Electron. Express, 2012)

Autonomous field mapping and operation with proximity sensing. - Ryo Saegusa; Kazutaka Hara; Yasushi Teshigawara; Yuka Mizushima (SII, 2015)

Wavelength Adjustment of Upstream Signal using AMCC with Power Monitoring for WDM-PON in 5G Mobile Era. - Kazuaki Honda; Hirotaka Nakamura; Kazutaka Hara; Kyosuke Sone; Goji Nakagawa; Yoshio Hirose; Takeshi Hoshida; Jun Terada; Akihiro Otaka (OFC, 2018)

Flexible Management of WDM-PON Using AMCC for 5G Radio Access Networks. - Kazuaki Honda; Hirotaka Nakamura; Kazutaka Hara; Kyosuke Sone; Goji Nakagawa; Yoshio Hirose; Takeshi Hoshida; Jun Terada (OECC/PSC, 2019)

Design for Long-Reach Coexisting PON in Consideration of Area Characteristics with Wavelength Selective Asymmetrical Splitters. - Atsuko Kawakita; Kazutaka Hara; Yasutaka Kimura; Kenji Horikawa; Hiroyuki Furukawa; Yasuhiro Suzuki; Satoshi Ikeda (OECC/PSC, 2019)

VLC/RF Channel Switching Process Adapting to User Mobility in Coexistence Architecture. - Ryota Shiina; Kazutaka Hara; Tomohiro Taniguchi; Toshiro Nakahira; Tomoki Murakami; Satoshi Ikeda (OECC/PSC, 2019)

Proportional-based Resource Allocation Control with QoS Adaptation for IEEE 802.11ax. - David González Filoso; Ryogo Kubo; Kazutaka Hara; Shinya Tamaki; Katsuya Minami; Kohji Tsuji (ICC, 2020)

Deadline-aware Emergency Data Resource Allocation Control for IEEE 802.11ax. - David González Filoso; Kazutaka Hara; Shinya Tamaki; Katsuya Minami; Kohji Tsuji; Ryogo Kubo (ICCE-TW, 2020)

Bus-Type Optical Access using DRA and Asymmetric Power Splitters for Accommodating Rural Users. - Ryo Igarashi 001; Masamichi Fujiwara; Takuya Kanai; Kazutaka Hara; Atsuko Kawakita; Hiro Suzuki; Junichi Kani; Jun Terada (OFC, 2020)

Design for Long-Reach Coexisting PON Considering Subscriber Distribution with Wavelength Selective Asymmetrical Splitters. - Kazutaka Hara; Atsuko Kawakita; Yasutaka Kimura; Yasuhiro Suzuki; Satoshi Ikeda; Kohji Tsuji (IEICE Trans. Commun., 2020)

In-Line Protocol-Independent Control and Management Method in End-to-End Optical Connections via Photonic Gateway. - Takuya Kanai; Shin Kaneko; Kazutaka Hara; Junichi Kani; Tomoaki Yoshida (ECOC, 2021)

Optical Access Network Evolution for Future Super-Broadband Services and 6G Mobile Networks. - Jun-ichi Kani; Shin Kaneko; Kazutaka Hara; Tomoaki Yoshida (ECOC, 2021)

Novel EA-DFB Mode-Switching Transmitter Supporting Continuous Phase Frequency Shift Keying and Intensity Modulation for All-Photonics Network. - Ryo Koma; Kazutaka Hara; Takuya Kanai; Junichi Kani; Tomoaki Yoshida (ECOC, 2021)

Photonic Gateway for Direct and Protocol-Independent End-to-End User Connections. - Kazuaki Honda; Takuya Kanai; Yasunari Tanaka; Kazutaka Hara; Shin Kaneko; Jun-ichi Kani; Tomoaki Yoshida (OFC, 2021)

Simultaneous Reception of ASK-based AMCC Signals and QPSK Signals with Single Coherent Receiver. - Ryo Igarashi 001; Ryo Koma; Kazutaka Hara; Kazuaki Honda; Junichi Kani; Tomoaki Yoshida (OFC, 2021)

Implementation and Evaluation of Novel Architecture Using Optical Wireless for WLAN Control Plane. - Ryota Shiina; Shinya Tamaki; Kazutaka Hara; Tomohiro Taniguchi; Shunsuke Saruwatari; Takashi Watanabe 001 (IEEE Access, 2021)

First Demonstration of 128-Gbit/s 300-GHz-band THz Transmission Using OFC-based Transmitter and Intradyne Receiver. - Ryo Igarashi 001; Keita Toichi; Tsubasa Saijo; Ryo Koma; Kazutaka Hara; Jun-ichi Kani; Tomoaki Yoshida; Tadao Nagatsuma (OECC/PSC, 2022)

300-GHz-Band Diplexer for Frequency-Division Multiplexed Wireless Communication. - Yuma Kawamoto; Toki Yoshioka; Norihiko Shibata; Daniel Headland; Masayuki Fujita; Ryo Koma; Ryo Igarashi 001; Kazutaka Hara; Jun-ichi Kani; Tadao Nagatsuma (IEICE Trans. Electron., 2023)

Equalizer-free 60-km Bidirectional Transmission of 100-Gbps PAM4 Signals Using Wavelength-range Estimation Method. - Yasunari Tanaka; Kazutaka Hara; Jun-ichi Kani; Tomoaki Yoshida (OFC, 2025)