Description of the thesis topic

Femtosecond laser tuning of nanoparticules in optical fibres

Work Context

The growth of optical fibres has always been supported by the development of new manufacturing processes. This project is part of this context by developing a new process for optical fibres containing nanoparticles. The potential of this new generation of fibres as lasers and sensors has already been demonstrated. Their development remains limited due to the lack of reliable processes to control the nanoparticles, in particular their size and structure, in the fibres. This project proposes to develop an innovative femtosecond laser bench to modify the characteristics of nanoparticles for fibre lengths ranging from µm to km, with possible variations in the characteristics of nanoparticles over micrometric fibre lengths. This control relies on the ability of such a laser to heat at high temperature with very high spatial resolution (µm3) as nanoparticles can be altered though thermodynamic processes.
The PhD student will develop the laser structuring workstation, study the laser/optical fibre interaction and characterize the structured optical fibres.

The position is located in a sector under the protection of scientific and technical potential (PPST), and therefore requires, in accordance with the regulations, that your arrival is authorized by the competent authority of the MESR.

Constraints and risks

Laser risks