R&D internship: Atmospheric turbulence simulation and optical propagation F/H

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Published on 16/10/2025

  • Contract type:  Internship

  • Work time:  Full time

  • Location Rennes

The company

Founded in 2013, Cailabs designs, manufactures, and develops innovative photonic solutions for the space, industry, telecommunications, and defense sectors. A global specialist in laser shaping, the company has accelerated its growth in the space field with turnkey optical ground stations that integrate atmospheric turbulence compensation technology. This makes it one of the first companies to harness very high data rates enabled by optics in a commercial ground station.

Cailabs currently has 150 employees, including 35 PhDs. With 29 patent families filed, the company is one of the most innovative companies in France. It is headquartered in Rennes, with offices in Paris and Washington (USA).

Internship description

Laser communications represent the next generation of secure, high-speed space communications. Dedicated to free-space optical communications, the TILBA solution improves the reliability of satellite links as well as naval, aeronautical (aircraft, drones) and terrestrial links. 

You will work in the R&D team under the supervision of a PhD in physics, R&D engineer and expert in numerical simulations. 

 

Your objective will be to study the analytical and numerical propagation of Hermite-Gaussian modes in free space, under the influence of atmospheric turbulence and pointing errors. You will draw on relevant scientific literature to define mathematical models relevant to the subject and quantitatively assess the impact of atmospheric turbulence and pointing errors on optical space communications links. 

 

Your work will benefit the entire R&D department in addressing optical problems in the space sector. You will have the opportunity to apply and improve your scientific knowledge, and you will learn to work in a team within a company on concrete topics. 

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Profile required

Key skills: 

  • Knowledge of wave optics and Fourier optics
  • Interest in applied mathematics
  • Training in optics during your studies 

 

Bonus points:  

  • Programming skills, particularly with Python and the SciPy stack
  • Knowledge of best practices in collaborative coding (Git version control, code review concepts, code style conventions)
  • Affinity for applied research
  • Rigour, motivation and autonomy  

 

When you join Cailabs, you'll find :

  • A dynamic team of engineers and PhDs who share your desire to apply your skills to stimulating technical challenges,
  • Collective emulation and a strong intellectual interest in your work,
  • A company at the cutting edge of technology, from the development of prototypes through to the industrialisation phases.

Plus :

  • Time for sharing and conviviality (annual seminar, meals, group games, sports activities, etc.).
  • A modern, pleasant working environment, conducive to collaborative working
  • Luncheon vouchers

Finally, joining Cailabs is the assurance that everything will be done to help you develop new skills.

For more information: www.cailabs.com

Réf: 0e796b22-6d69-40c6-883d-28f49daa2442

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R&D internship: Atmospheric turbulence simulation and optical propagation F/H

Internship
Full time
Rennes

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