Print

Optical

Optical Optical

Research and development on innovative technologies for next-generation optical infrastructure toward Beyond 5G and 6G era.

Ultra-High Capacity Optical Transmission
Radio over Fiber
Free-Space Optical Communication
Optical Information Processing
Photonic Devices

News Release&Topics

World's First Successful Demonstration of Quantum Key Distribution Technology for Multiplexing Over 30 Tbps of High-Capacity Data and Secret Keys

Advanced Technology Laboratories

December 4, 2023

Fujitsu and KDDI Research successfully implement large-capacity multiband wavelength multiplexing transmission with installed optical fiber

Advanced Technology Laboratories

October 20, 2023

World’s First Successful Experiments in Ultrawideband Optical Fiber Transmission at 115.2 THz, 24 Times Broader Than Conventional Bandwidth

Advanced Technology Laboratories

Utilization of ultrawide bands to increase the capacity of optical fiber communication: The world’s first successful O-band coherent high-density wavelength division multiplexing transmission experiment

Advanced Technology Laboratories

November 21, 2022

KDDI Research members win 2022 IEEE Photonics Technology Letters Best Paper Award

Publications

Enhanced Reflection Tolerance in Analog RoF Systems Using Narrow-Linewidth Laser and Low-Chirp Intensity Modulator

Kazuki Tanaka, Shinji Nimura, Ryo Inohara, Takehiro Tsuritani

OptoElectronics and Communications Conference (OECC) 2025

June 2025

Field Trial for Streaming of Four-Channel Uncompressed 4K Video over IP-based Network Involving FSO Link Assuming a Pragmatic Use Case in a Motorsport Event

Kosuke Nishimura, Michikazu Hattori(Toyo Electric Corporation), Yukihiko Suga(Toyo Electric Corporation), Yuichiro Hara(Toyo Electric Corporation), Yui Otagaki(Mie University), Shin Fukuhara, Hidenori Takahashi, Ken-ichi Kashima(Kokusai Electric Inc.), Atsunobu Ohta(Dexerials Photonics Solution Corporation), Takehiro Tsuritani, Hiroshi Murata(Mie University)

OptoElectronics and Communications Conference (OECC) 2025

June 2025

22.8-GHz Optical Frequency Comb Generation at 780 nm based on Regeneratively Mode-locked Laser for Visible-light Coherent DWDM Communications

Takashi Kan, Shota Ishimura, Abdulaziz E. Elfiqi, Hidenori Takahashi, Takehiro Tsuritani

OptoElectronics and Communications Conference (OECC) 2025

June 2025

Demonstration on Service Provisioning and Fault Recovery in Metro-Access Converged Optical Network with Digital-Coherent PtMP and PtP Transceivers

Chenxiao Zhang, Ceng Wang, Daiki Soma, Shohei Beppu, Ryo Inohara, Noboru Yoshikane, Yuta Wakayama, Takehiro Tsuritani

OptoElectronics and Communications Conference (OECC) 2025

June 2025

Extending the Closed Form Approximation of the ISRS GN Model in the Zero-Dispersion Regime for Arbitrary Modulation Format, Span Length, and Fiber Loss

Filippos Balasis, Mindaugas Jarmolovičiusr(University of London), Daniel J. Elson, Eric Sillekensr(University of London), Han Wang, Robert I. Killeyr(University of London), Polina Bayvelr(University of London), Noboru Yoshikane, Takehiro Tsuritani, Yuta Wakayama

OptoElectronics and Communications Conference (OECC) 2025

June 2025

Awards

2023.7.4

OECC2023（the 28th Optoelectronics and Communications Conference）「Best Paper Award in Industry Innovation」

Power-Fading-Free Analog-RoF Transmission using IF/LO Frequency Optimization

Shinji Nimura, Kazuki Tanaka, Hirotaka Ochi, Kousuke Nishimura, Ryou Inohara

2023.3.6

OFC2023「Top Scored Paper」

Automation of Fast Configuration Error Diagnosis in Optical Transport Networks - Natural Language Processing is All You Need

Cen Wangk, Noboru Yoshikane, Daniel Elson, Takehiro Tsuritani

2023.3.6

OFC2023「Top Scored Paper」

114 Pbit/s･km Transmission Using Three Vendor-Installed 60-km Standard Cladding Multi-Core Fiber Spans With Multiple Fusion Splicing

Daiki Soma, Shohei Beppu, Yuichi Miyagawa (KDDI Corporation), Noboru Yoshikane, Takehiro Tsuritani

2023.3.6

OFC2023「Top Scored Paper」

Real-Time 6-Mode 19-Core Fiber Transmission

Shohei Beppuk, Masahiro Kikuta(NEC Platforms, Ltd.), Daiki Soma, Yoichi Yaegashi(NEC Platforms, Ltd.), Koji Igarashi(Osaka University), Masahiro Shigihara(NEC Platforms, Ltd.), Kazuhiko Aizawa(NEC Platforms, Ltd.), Noboru Yoshikane, Takehiro Tsuritani

2022.9.22

The 48th European Conference on Optical Communication (ECOC 2022)「Highly Scored Paper」

FIFO-Less Core-Pumped Multicore Fibre Amplifier With Fibre Bragg Grating Based Gain Flattening Filter

Yuta Wakayama, Noboru Yoshikane, Takehiro Tsuritani