R&D internship: Analysis-based optical simulation for laser beam shaping F/H

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Published on 30/10/2025

  • 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

During this internship, you will join our R&D team and work under the supervision of a PhD in physics, an R&D engineer specialising in numerical simulations. Your main objective will be to develop simulation tools that use standard machine learning libraries to design advanced optical systems for beam shaping.

Your work will contribute directly to the team's efforts to develop and optimise innovative optical solutions.
The essential part of your mission will be to design diffractive neural networks to go beyond traditional linear algebraic approaches.
This internship offers a unique opportunity to deepen your expertise in applied and digital optics, gain practical experience in AI-based optical design, discover the dynamics of an industrial R&D environment, and contribute directly to cutting-edge technological developments at the crossroads of photonics and artificial intelligence. 

Translated with DeepL.com (free version)

Essential skills

The project requires solid knowledge of optics, numerical modelling and Python programming.

Key points: 

  • Second- or third-year engineering student
  • Interest in programming and numerical simulation 
  • Training in optics during your studies
  • Python programming 

Bonus points:  

  • Knowledge of AI libraries
  • Interest in applied research
  • Rigour, motivation and autonomy 

By joining Cailabs, you will find:

A dynamic team of engineers and PhDs who share your desire to put their skills to work on stimulating technical challenges.
A collective spirit of emulation and a strong intellectual interest in your work.
A company at the cutting edge of technology, from prototype development to industrialisation.

And also:

Opportunities for sharing and socialising (annual seminar, meals, group games, sports activities, etc.)
A modern and pleasant working environment, conducive to collaborative work
Meal vouchers

 

Joining Cailabs means you can be sure that everything will be done to help you develop new skills.

For more information: www.cailabs.com

Réf: c4f139df-1543-490c-b8da-a5f14089357f

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R&D internship: Analysis-based optical simulation for laser beam shaping F/H

Internship
Full time
Rennes

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