{"id":12879,"date":"2026-10-23T16:06:25","date_gmt":"2026-10-23T14:06:25","guid":{"rendered":"https:\/\/www.institut-foton.eu\/?p=12879"},"modified":"2026-10-23T16:06:27","modified_gmt":"2026-10-23T14:06:27","slug":"cost-and-energy-effective-laser-source-technology-for-short-range-tb-s-optical-data-communication-links-2","status":"publish","type":"post","link":"https:\/\/www.institut-foton.eu\/en\/cost-and-energy-effective-laser-source-technology-for-short-range-tb-s-optical-data-communication-links-2\/","title":{"rendered":"Cost- and energy-effective laser-source technology for short range Tb\/s optical data communication links"},"content":{"rendered":"\n

\u2b9e D\u00e9partement SP<\/a> \u2b9e Th\u00e9matiques de recherche<\/a><\/a>\u2b9e Activit\u00e9s \u00ab Communications Optiques \u00bb<\/a><\/p>\n\n\n\n

Because of our unrestrained use of digital technologies, data centers are overloading electrical grids and demanding huge amounts of water and energy. Faced with our inability to envision new paradigms for our societies, researchers work on energy-efficient and high bandwidth solutions meeting data centers bandwidth needs.<\/p>\n\n\n\n

In this work, LAAS-CNRS has developed a new surface emission electro-optic transducer. This technology, the same as the vertical-cavity surface-emitting laser (VCSEL) one, gives a good energy-efficiency \/ cost \/ bandwidth trade-off. VCSEL dynamic properties is however intrinsically limited by its direct carrier modulation. Surface-normal modulator addresses this issue while being compatible with a monolithic integration with a VCSEL (used in this case as a continuous laser source), and with a 2D matrix integration. Fabricated on an AlGaAs platform for modulation in the 850 nm spectral window, a modulation bandwidth of 33 GHz has been measured on the device which is at the state of the art in this spectral window.<\/p>\n\n\n\n

In accordance with the heart of the activities in optical telecommunication at institut Foton, and using experimental tools of PERSYST platform, our role was to study this on-chip device for future optical networks. After static characterizations in order to grasp the physical mechanisms under play (a-b), dynamic characterizations gave an idea of its performances close to real conditions at 50 Gbit\/s at different wavelengths and transmission distances (c-d).<\/p>\n\n\n\n

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Projets financ\u00e9s<\/h2>\n\n\n\n