R&D internship: optical collimation improvement F/H

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Published on 03/11/2025

  • 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

Optical free-space communication is a challenge for future communication systems. The TILBA®-LOS product enables point-to-point links with a throughput of 10 Gbps over distances greater than 10 km. It has the advantage of being highly secure thanks to its highly directional beam, which is difficult to detect. Thanks to the use of optical frequencies, it does not require spectral licences.

 

You will work within the technical team under the supervision of an optical R&D engineer.

The internship aims to improve the collimation optics in the TILBA®-LOS optical system. It will consist of an evaluation of collimation solutions and their impact on the detector. 

 

Your tasks:

  • Use ZEMAX software to determine the shapes of collimation optics that optimise the quality of the received beam and the emitted beam. The aim is to optimise the amount of light received in the detector and the direction of the emitted light so that it targets the receiver of the optical module with which communication is desired.
  • Analyse the results of previous test campaigns and any test campaigns carried out during the internship. 
  • The internship may also include an experimental component involving Pointing Acquisition and Tracking (PAT), which will be optimised by testing new solutions in the laboratory. 

 

Profile required

Desired profile: Engineering schools or Master's degree in research (optics, physics, applied mathematics)

Key skills: 

  • Knowledge of classical geometric optics
  • Basic knowledge of laser optics 

Bonus points:  

  • Knowledge of the Python programming language
  • 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

Translated with DeepL.com (free version)

Réf: 83517483-87f8-44d4-8718-ad51fd2f9943

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R&D internship: optical collimation improvement F/H

Internship
Full time
Rennes

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