Hiroki Kawahara

According to our database, Hiroki Kawahara authored at least 18 papers between 2017 and 2024.

Collaborative distances:

• Dijkstra number of five.
• Erdős number of four.

2024

No-guard-band integration of digital coherent CV-QKD system into 400 Gbit/s 75 GHz grid DWDM systems.

Tetsuo Kawakami, Hiroki Kawahara, Toshihiko Okamura, Ken-Ichiro Yoshino, Wakako Maeda

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2024

2023

Level Allocation of Four-Level Pulse-Amplitude Modulation Signal in Optically Pre-Amplified Receiver Systems.

Hiroki Kawahara, Koji Igarashi, Kyo Inoue

IEICE Trans. Commun., August, 2023

Highly Efficient Multi-Band Optical Networks with Wavelength-Selective Band Switching.

Masahiro Nakagawa, Hiroki Kawahara, Takeshi Seki, Takashi Miyamura

IEICE Trans. Commun., May, 2023

2022

Magic Drops: Food 3D Printing of Colored Liquid Balls by Ultrasound Levitation.

Hiroki Kawahara, Kaito Yamao, Kentaro Oda

Proceedings of the Adjunct Publication of the 35th Annual ACM Symposium on User Interface Software and Technology, 2022

2021

Real-Time Experiment and Numerical Analysis of Highly-Survivable Adaptive Restoration for High-Capacity Optical Signal Transmission.

Hiroki Kawahara, Kohei Saito, Masahiro Nakagawa, Takashi Kubo, Takeshi Seki, Takeshi Kawasaki, Hideki Maeda

IEICE Trans. Commun., 2021

Analysis of Signal Distribution in ASE-Limited Optical On-Off Keying Direct-Detection Systems.

Hiroki Kawahara, Kyo Inoue, Koji Igarashi

IEICE Trans. Commun., 2021

Adaptive Link-by-Link Band Allocation: A Novel Adaptation Scheme in Multi-Band Optical Networks.

Masahiro Nakagawa, Hiroki Kawahara, Takeshi Seki, Takashi Miyamura

Proceedings of the International Conference on Optical Network Design and Modeling, 2021

2020

Dual-Carrier 1-Tb/s Transmission Over Field-Deployed G.654.E Fiber Link Using Real-Time Transponder.

Fukutaro Hamaoka, Takeo Sasai, Kohei Saito, Takayuki Kobayashi, Asuka Matsushita, Masanori Nakamura, Hiroki Taniguchi, Shoichiro Kuwahara, Hiroki Kawahara, Takeshi Seki, Josuke Ozaki, Yoshihiro Ogiso, Hideki Maeda, Yoshiaki Kisaka, Masahito Tomizawa

IEICE Trans. Commun., 2020

High spectral efficiency real-time 500-Gb/s/carrier transmission over field-installed G.654.E fiber link using forward and backward distributed Raman amplification.

Kohei Saito, Takeo Sasai, Fukutaro Hamaoka, Hiroki Kawahara, Takeshi Seki, Hideki Maeda

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2020

Real-Time Demonstration of 500-Gbps/Lambda and 600-Gbps/Lambda WDM Transmission on Field-Installed Fibers.

Hideki Maeda, Hiroki Kawahara, Kohei Saito, Takeshi Seki, Takeo Sasai, Fukutaro Hamaoka

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2020

The Impact of Nonlinear Phase Noise Induced from Low-Speed Optical Supervisory Channel on Soft-Decision FEC Performance.

Hiroki Kawahara, Kohei Saito, Takeshi Seki, Takeshi Kawasaki, Hideki Maeda

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2020

Experimental Demonstration of Wavelength-Selective Band/Direction-Switchable Multi-Band OXC Using an Inter-Band All-Optical Wavelength Converter.

Hiroki Kawahara, Masahiro Nakagawa, Takeshi Seki, Takashi Miyamura

Proceedings of the European Conference on Optical Communications, 2020

2019

Throughput Enhancement with Overlay Network Virtualization Using Commodity Devices.

Hiroki Kawahara, Ryo Yamamoto, Satoshi Ohzahata, Toshihiko Kato

Proceedings of the 12th IEEE/ACM International Conference on Utility and Cloud Computing, 2019

Numerical Analysis of Adaptive Restoration in Optical Transport Networks.

Masahiro Nakagawa, Hiroki Kawahara, Kana Masumoto, Hidetoshi Onda, Kazuyuki Matsumura

Proceedings of the 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC), 2019

Real-time demonstration of 600Gbps/carrier WDM transmission and highly-survivable adaptive restoration on field installed fiber.

Hiroki Kawahara, Kohei Saito, Masahiro Nakagawa, Takashi Kubo, Takeshi Seki, Takeshi Kawasaki, Hideki Maeda, Tomohiro Sekino, Naoki Bannai, Masaki Shinkai, Tomoki Sakamaki, Kenjiro Yamanaka, Takashi Kurimoto

Proceedings of the 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC), 2019

Dual-Carrier 1-Tb/s Transmission Over Field-Deployed Large-Core Pure-Silica-Core Fiber Link Using Real-Time Transponder.

Fukutaro Hamaoka, Takeo Sasai, Kohei Saito, Takayuki Kobayashi, Asuka Matsushita, Masanori Nakamura, Hiroki Taniguchi, Shoichiro Kuwahara, Hiroki Kawahara, Takeshi Seki, Josuke Ozaki, Yoshihiro Ogiso, Hideki Maeda, Yoshiaki Kisaka, Masahito Tomizawa

Proceedings of the 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC), 2019

2018

Integrated Wavelength Selective Switch Array for Space Division Multiplexed Network with Ultra-Low Inter-Spatial Channel Crosstalk.

Keita Yamaguchi, Kazunori Seno, Kenya Suzuki, Hiroki Kawahara, Mitsunori Fukutoku, Toshikazu Hashimoto, Yutaka Miyamoto

Proceedings of the Optical Fiber Communications Conference and Exposition, 2018

2017

SDM-compatible dynamic gain equalizer using spatial and planar optical circuit.

Mitsumasa Nakajima, Kenya Suzuki, Keita Yamaguchi, Hirotaka Ono, Hiroki Kawahara, Mitsunori Fukutoku, Takayuki Mizuno, Yutaka Miyamoto, Toshikazu Hashimoto

Proceedings of the Optical Fiber Communications Conference and Exhibition, 2017