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III-V on Silicon transceivers based on selective area growth for advanced modulation formats

Technological challenge: Photonics, Imaging and displays (learn more)

Department: Département d'Optronique (LETI)

Laboratory: Laboratoire d'Intégration Photonique sur Silicium

Start Date: 01-10-2022

Location: Grenoble

CEA Code: SL-DRT-22-0671

Contact: karim.hassan@cea.fr

Context: Optical communications are commonly used to answer the growing needs in data exchanges for personal and professional usage through fiber optics communication up to the datacenters where user information is processed and stored, as well as for next gen 4.0 industries where interconnects should enhance the production efficiency. Most of these communications are achieved through a large fiber optical network on which multiple electronic-photonic transducer nodes are deployed in order to route the data stream at high speed. On each of these nodes, inside and outside the datacenters, or in Central office where FTTH/Point-to-Point optical links are connected to the core network, high performance optical transceivers are needed to emit and receive the information. Topic: This thesis aims at the development of an advanced technology in order to demonstrate beyond state of the art III-V on Silicon transceivers. On the basis of a key fabrication process, the so-called selective area growth on silicon demonstrated recently by III-V Lab and CEA-LETI, innovative III-V on Silicon devices will be modelled, designed, and fabricated, towards high speed and high efficiency light generation and modulation. Such devices will require opto-electronic optimizations of the III-V stack and coupling to the SOI layer in order to reach high phase shift per volt, low losses, together with high bandwidth for coherent communication beyond 16-QAM, targeting more than 200Gbps/lane. The PhD will be based in CEA-LETI Grenoble, inside the Silicon Photonics Integration Laboratory, in the framework of the R&D Photonics Program existing between CEA and III-V Lab that will co-supervise the thesis work

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