OKI and Partners Achieve World's First Demonstration of Broadband, Bidirectional Transmission over a Single Hollow Core Fiber
OKI, Lightera, and Keio University have successfully demonstrated bidirectional transmission of broadband wavelength-multiplexed signals (1.26μm–1.58μm) over a single Hollow Core Fiber. The technology is expected to address increasing traffic while reducing power consumption by 90%.
📋 Article Processing Timeline
- 📰 Published: May 26, 2026 at 21:00
- 🔍 Collected: May 26, 2026 at 12:31
- 🤖 AI Analyzed: May 26, 2026 at 12:32 (1 min after Collected)
Oki Electric Industry Co., Ltd. (OKI), Lightera Japan Ltd. (Lightera), and Keio University announced the results of a next-generation optical network demonstration using Hollow Core Fiber (HCF). The project was conducted as part of the Ministry of Internal Affairs and Communications' R&D project, 'R&D on Advanced Optical Transmission Technology Contributing to a Green Society: JPMI00316,' utilizing Keio University's 'Open Research Center for Future Optical Networks.'
By combining a prototype of a next-generation optical line system developed primarily by OKI with HCF developed by Lightera, the partners successfully achieved the world's first bidirectional transmission of broadband wavelength-multiplexed signals ranging from 1.26μm to 1.58μm over a single core. Furthermore, they confirmed the minimization of power consumption through optimal capacity switching. Once commercialized, this technology is expected to reduce power consumption to 1/10th of current levels while coping with the increase in communication traffic.
Moving forward, OKI plans to promote use-case research leveraging the features of HCF in addition to next-generation PON systems, aiming to commercialize access systems required for 100G-PON and IOWN®. Lightera will proceed with characteristic improvements and mass production towards early commercialization of HCF, while planning further demonstrations with various users by leveraging Keio University's open lab.
By combining a prototype of a next-generation optical line system developed primarily by OKI with HCF developed by Lightera, the partners successfully achieved the world's first bidirectional transmission of broadband wavelength-multiplexed signals ranging from 1.26μm to 1.58μm over a single core. Furthermore, they confirmed the minimization of power consumption through optimal capacity switching. Once commercialized, this technology is expected to reduce power consumption to 1/10th of current levels while coping with the increase in communication traffic.
Moving forward, OKI plans to promote use-case research leveraging the features of HCF in addition to next-generation PON systems, aiming to commercialize access systems required for 100G-PON and IOWN®. Lightera will proceed with characteristic improvements and mass production towards early commercialization of HCF, while planning further demonstrations with various users by leveraging Keio University's open lab.
FAQ
空孔コア光ファイバーとはどのような技術ですか？
中心部（コア）が空洞になっており、光信号を空気中で伝送する光ファイバーです。一般的な光ファイバーに比べて信号の劣化を抑えやすく、広帯域・低遅延伝送に適しています。伝送遅延はシングルモードファイバーの約2/3です。
今回の実証実験の主な成果は何ですか？
OKIの次世代光回線システムとライテラの空孔コア光ファイバーを組み合わせ、1.26μm〜1.58μmの広帯域波長多重信号を用いた、世界初の1芯双方向伝送に成功しました。また、最適な収容切替による消費電力の最小化を確認しました。
この技術が実用化されるとどのようなメリットがありますか？
通信トラフィックの急増に対応しつつ、設備運用時の消費電力を従来の1/10まで低減することが見込まれます。また、低遅延・大容量な次世代の通信基盤として、新たなサービス創出に寄与します。
今後の計画を教えてください。
OKIは次世代PONシステムや100G-PON、IOWN構想を見据えたアクセスシステムの実用化に向けた研究開発を推進します。ライテラは特性改善と量産化を進め、慶應義塾の施設を活用したユーザーとの実証実験を展開する予定です。
この研究はどのプロジェクトの一環で行われましたか？
総務省の研究開発プロジェクト「グリーン社会に資する先端光伝送技術の研究開発：JPMI00316」の一環として実施されました。