M/F Postdoc position on development of fluoride fiber lasers emitting in the visible

CNRS; France; Sur place; EUR 40 000 - 60 000; Plein temps

Résumé du poste

A leading research institution in France is seeking a postdoctoral researcher for a project focused on developing monolithic all-fiber laser systems for real-world applications in health science and quantum technology. The candidate will need a PhD in photonics or applied physics and experience in optics, laser physics, and ultrafast optics. Responsibilities include creating fiber components and lasers within a multidisciplinary team. This temporary position offers a contract duration of 12 months with a renewable option.

Qualifications

• PhD diploma required in photonics or applied physics.
• Experience in optics, laser physics, and ultrafast/non-linear optics.
• Ability to design and build fiber components and lasers.

Responsabilités

• Develop monolithic all-fiber laser systems emitting in the visible range.
• Explore approaches to develop fluoride fiber components.
• Design and optimize compact fiber lasers and amplifiers.

Connaissances

Theoretical and experimental skills in optics

Laser physics

Ultrafast/non-linear optics

Team collaboration

Formation

PhD in photonics or applied physics

Description du poste

Organisation/Company CNRS Department Complexe de recherche interprofessionnel en aérothermochimie Research Field Physics Researcher Profile Recognised Researcher (R2) Country France Application Deadline 24 Dec 2025 - 23:59 (UTC) Type of Contract Temporary Job Status Full-time Hours Per Week 35 Offer Starting Date 1 Feb 2026 Is the job funded through the EU Research Framework Programme? Not funded by a EU programme Is the Job related to staff position within a Research Infrastructure? No

Offer Description

The CORIA and CIMAP laboratories are inviting applications for a PhD position under LUMEN project funded by BPI-France, France 2030 and Normandy Region within I-Démo 2024 program. The project gathers experts in fiber laser design, realization and qualification aiming to develop a disruptive laser technology to address realworld applications in health science and quantum technology. The basic concept relies on the exploitation of low phonon rare-earth-doped fluoride glasses. Indeed, recent advances made in the fabrication of high-purity fluoride glass fibers show that this technology is very appealing for the development powerful and efficient laser sources in the visible. Fluoride fiber lasers delivering several watts of power in the green and red wavelengths have been already demonstrated in the laboratory environment [1] E. Kifle, A. Baillard, P. Loiko, T. Berthelot, F. Joulain, L. Bodin, F. Pau, G. Recoque, T. Georges, and P. Camy, "10-watt diode-pumped red Pr:ZBLAN double-clad fiber laser," Opt. Express 33, 11110 (2025). [2] E. Kifle, F. Starecki, P. Loiko, S. Cozic, F. Joulain, T. Berthelot, T. Georges, D. Stojcevski, D. Deubel, P. Camy, “Watt-level visible laser in double-clad Pr3+-doped fluoride fiber pumped by a GaN diode," Opt. Lett. 46, 74-77 (2021).

This postdoc project focuses on the development of monolithic all-fiber laser systems emitting in the visible wavelength range, whose performance meets the requirements of industrial applications. The development of such high-performance fiber laser platforms requires advances in the development of high-reliability fiber components and optimized doped fibers. The first objective of this project is to explore different approaches to develop fluoride fiber components and build optical benches to validate their performances. The second objective will focus on the design, realization and optimization of compact fiber lasers and amplifiers operating in continuous wave regime. Power-scaling and wavelength tunability in the visible will be explored using different rare-earth ions. The realization of all-fiber sources operating in the ultrafast pulsed regime will also be addressed using different mode-locking techniques.

CORIA is a Joint Research Unit (UMR) affiliated with the Institute of Engineering and Systems (INSIS) of CNRS, the University of Rouen Normandy, and the Institute of Applied Sciences (INSA) of Rouen Normandy. It is located at the Madrillet technopole, near Rouen. CORIA's research domains encompass both fundamental and applied studies in photonics, turbulence, atomization, and reactive flows. The recruited person will join the Optics and Lasers Department of CORIA. The position falls within a sector related to the protection of scientific and technical potential (PPST), and therefore, in accordance with regulations, your arrival must be authorized by the competent authority of MESR.

The applicant should hold a PhD diploma in the fields of photonics or applied physics, with theoretical and experimental skills on optics, laser physics and/or ultrafast/non-linear optics. The research involves design and building fiber components and lasers as well as data collection and analysis within a collaborative project. The candidate should have an affinity for working in multidisciplinary teams involved in this project.

Additional comments

Contract duration: 12 months renewable once.

Closing date for the receipt of applications: December 23, 2025.

Please submit your CV and cover letter.