General information
Organisation
The French Alternative Energies and Atomic Energy Commission (CEA) is a key player in research, development and innovation in four main areas :
• defence and security,
• nuclear energy (fission and fusion),
• technological research for industry,
• fundamental research in the physical sciences and life sciences.
Drawing on its widely acknowledged expertise, and thanks to its 16000 technicians, engineers, researchers and staff, the CEA actively participates in collaborative projects with a large number of academic and industrial partners.
The CEA is established in ten centers spread throughout France
Reference
SL-DRT-26-0497
Direction
DRT
Thesis topic details
Category
Technological challenges
Thesis topics
Novel architecture and signal processing for mobile optical telecommunications
Contract
Thèse
Job description
Free-Space Optical Communications (FSO) rely on transmitting data via light between two distant points, eliminating the need for fibers or cables. This approach is particularly valuable when wired connections are impractical or prohibitively expensive.
However, these links are highly susceptible to atmospheric conditions—fog, rain, dust, and thermal turbulence—which attenuate or distort the light beam, significantly degrading communication quality. Current solutions remain costly and limited, both in terms of optical compensation hardware and signal processing algorithms.
Within this framework, the thesis aims to design high-performance, robust mobile optical links capable of adapting to dynamic and disturbed environments. The study will focus on leveraging Silicon-based Optical Phased Arrays (OPAs)—a technology derived from low-cost LiDAR systems—offering a promising path toward compact, integrated, and cost-effective architectures.
The primary focus of the research will be developing advanced algorithmic approaches for signal processing and compensation. The PhD candidate will be tasked with designing a dedicated simulation environment to evaluate and validate architectural choices and algorithmic strategies before practical experimentation.
The overarching goal is to propose an integrated, flexible, and reliable architecture that ensures uninterrupted optical communication in motion, with potential applications in aerospace, space, and terrestrial domains.
University / doctoral school
Sciences et Technologies de l’Information et de la Communication (STIC)
Paris-Saclay
Thesis topic location
Site
Grenoble
Requester
Position start date
01/10/2026
Person to be contacted by the applicant
DELAUNAY Nicolas
nicolas.delaunay@cea.fr
CEA
DRT/DSYS//LS2PR
17 rue des Martyrs
38054 Grenoble
Cedex 9
+33 4 38 78 43 55
Tutor / Responsible thesis director
CHASSAGNE Luc
luc.chassagne@uvsq.fr
Université Paris Saclay
Laboratoire d'Ingénierie des Systèmes de Versailles
Laboratoire d'Ingénierie des Systèmes de Versailles (LISV)
10-12 avenue de l'Europe - IUT
78140 Vélizy FRANCE
+33 1 39 25 49 84
En savoir plus
https://www.linkedin.com/in/nicolasdelaunay/
https://www.leti-cea.fr/cea-tech/leti/Pages/recherche-appliquee/plateformes/plateforme-telecommunications.aspx