{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1040282256970819584.json","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"18H03788"},{"@type":"JGN","@value":"JP18H03788"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18H03788/"}],"jpcoar:awardTitle":[{"@language":"ja","@value":"全光信号処理を廃した超高速光通信を実現する光時間周波数離散直交変換技術"},{"@language":"en","@value":"Optical Discrete Time-Frequency Transform for Ultrafast Communications"}],"field":[{"keyword":[{"language":"ja","textList":["中区分21:電気電子工学およびその関連分野"]},{"language":"en","textList":["Medium-sized Section 21:Electrical and electronic engineering and related fields"]}]}],"dc:language":"ja","description":[{"type":"outline_of_research_achievement","notation":[{"@language":"ja","@value":"提案する光時間周波数離散直交変換技術の実証を行い、超高光通信のための超級超高光変復調・信号処理能力を確認した。超高速光通信に不可欠とされてきた全光信号処理技術に依存せずに、超高速・超広帯域光変復調、コヒーレントな信号処理能力を実証した。100~数100Gb/sのコヒーレント光送受信の実証を通じ、THz超級の超高速光通信に道筋を開いた。また、光通信ネットワーク応用への適用可能性を探り、光ネットワークノード処理等、超高光通信に不可欠な超高光信号処理機能の原理実証に成功した。"},{"@language":"en","@value":"We have demonstrated the proposed optical time-frequency discrete orthogonal transformation technology and confirmed its capability of ultra-high-speed transmission and signal processing for high-bandwidth optical communications. We have demonstrated ultrafast and ultrabroadband optical modulation, demodulation, and coherent signal processing capability without relying on all-optical signal processing technology. Our work has opened up new possibilities for ultrafast optical communications beyond the THz level. We have demonstrated the feasibility of coherent optical transmission and reception at speeds ranging from 100 to several 100 Gb/s, a significant step towards practical implementation.\nWe have also explored the possibility of applying this technology to optical communication networks, and succeeded in demonstrating the principle of ultra-high optical signal processing functions that are essential for ultra-high optical communications, such as optical network node processing."}]},{"type":"significance_of_research_achievement","notation":[{"@language":"ja","@value":"従来の超高速光通信、光信号処理では、超高精細光フィルタ技術の適用や，非線形光学を前提とし、光を光のまま操作する全光信号処理技術の適用は避けられないとさ れてきた。本研究は、帯域の限られた光電子技術のみ を用いても、適切な回路構築により、 超高速光変復調・信号処理能力を獲得できることを示したことになる。"}]}],"researcher":[{"@id":"https://cir.nii.ac.jp/crid/1420845751165078912","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"70392727"},{"@type":"NRID","@value":"1000070392727"},{"@type":"NRID","@value":"9000004738239"},{"@type":"NRID","@value":"9000004738275"},{"@type":"NRID","@value":"9000296674148"},{"@type":"NRID","@value":"9000311056635"},{"@type":"NRID","@value":"9000021439339"},{"@type":"NRID","@value":"9000296673817"},{"@type":"NRID","@value":"9000361225906"},{"@type":"NRID","@value":"9000107334013"},{"@type":"NRID","@value":"9000021395024"},{"@type":"NRID","@value":"9000006917884"},{"@type":"NRID","@value":"9000021439194"},{"@type":"NRID","@value":"9000297498196"},{"@type":"NRID","@value":"9000021394946"},{"@type":"NRID","@value":"9000378649448"},{"@type":"NRID","@value":"9000307257070"},{"@type":"NRID","@value":"9000307256524"},{"@type":"NRID","@value":"9000325824094"},{"@type":"NRID","@value":"9000313183188"},{"@type":"NRID","@value":"9000021418550"},{"@type":"NRID","@value":"9000325824446"},{"@type":"NRID","@value":"9000242722865"},{"@type":"NRID","@value":"9000259338184"},{"@type":"NRID","@value":"9000018363956"},{"@type":"NRID","@value":"9000311056393"},{"@type":"NRID","@value":"9000018787833"},{"@type":"NRID","@value":"9000401728990"},{"@type":"NRID","@value":"9000409988292"},{"@type":"NRID","@value":"9000021273263"},{"@type":"NRID","@value":"9000021272112"},{"@type":"NRID","@value":"9000021418601"},{"@type":"NRID","@value":"9000313182423"},{"@type":"NRID","@value":"9000307256918"},{"@type":"NRID","@value":"9000301385809"},{"@type":"NRID","@value":"9000300213678"},{"@type":"NRID","@value":"9000323835551"},{"@type":"NRID","@value":"9000375846099"},{"@type":"NRID","@value":"9000021439487"},{"@type":"NRID","@value":"9000258176263"},{"@type":"NRID","@value":"9000020282611"},{"@type":"NRID","@value":"9000242893706"},{"@type":"NRID","@value":"9000020868192"},{"@type":"NRID","@value":"9000021439632"},{"@type":"NRID","@value":"9000280298954"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/tsakatsakatsaka"}],"foaf:name":[{"@language":"ja","@value":"坂本 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哲也"}],"jpcoar:affiliationName":[{"@language":"ja","@value":"早稲田大学"}],"role":"co_investigator_buntan"},{"@id":"https://cir.nii.ac.jp/crid/1420845751163876992","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"60328523"},{"@type":"NRID","@value":"1000060328523"},{"@type":"NRID","@value":"9000003431946"},{"@type":"NRID","@value":"9000402035284"}],"foaf:name":[{"@language":"ja","@value":"山本 直克"}],"jpcoar:affiliationName":[{"@language":"ja","@value":"国立研究開発法人情報通信研究機構"}],"role":"co_investigator_buntan"}],"since":"2018-04-01","until":"2023-03-31","institution":[{"institutionIdentifier":[{"@type":"NII","@value":"383075"}],"notation":[{"@language":"ja","@value":"東京都立大学"},{"@language":"en","@value":"Tokyo Metropolitan University"}]}],"fundingProgram":[{"jpcoar:funderName":[{"@language":"ja","@value":"科学研究費助成事業"},{"@language":"en","@value":"Grants-in-Aid for Scientific Research"}]}],"url":[{"@id":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18H03788/","notation":[{"@value":"KAKEN"}]}],"createdAt":"2018-04-23","modifiedAt":"2026-01-16","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=%E5%85%89%E5%A4%89%E5%BE%A9%E8%AA%BF","dc:title":"光変復調"},{"@id":"https://cir.nii.ac.jp/all?q=%E5%85%89%E4%BF%A1%E5%8F%B7%E5%87%A6%E7%90%86","dc:title":"光信号処理"},{"@id":"https://cir.nii.ac.jp/all?q=%E8%B6%85%E9%AB%98%E9%80%9F%E5%85%89%E5%A4%89%E8%AA%BF","dc:title":"超高速光変調"},{"@id":"https://cir.nii.ac.jp/all?q=%E8%B6%85%E9%AB%98%E9%80%9F%E5%85%89%E5%BE%A9%E8%AA%BF","dc:title":"超高速光復調"},{"@id":"https://cir.nii.ac.jp/all?q=%E5%85%89%E9%80%9A%E4%BF%A1","dc:title":"光通信"},{"@id":"https://cir.nii.ac.jp/all?q=%E5%85%89%E5%A4%89%E8%AA%BF","dc:title":"光変調"},{"@id":"https://cir.nii.ac.jp/all?q=%E5%85%89%E5%BE%A9%E8%AA%BF","dc:title":"光復調"}],"dataSourceIdentifier":[{"@type":"KAKEN","@value":"18H03788"}],"grant":{"grantIdentifier":[{"@type":"NII","@value":"68"}],"jpcoar:fundingStream":[{"@language":"ja","@value":"基盤研究(A)"},{"@language":"en","@value":"Grant-in-Aid 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