Special optical fibers for extending telecommunications frequency bandwidth

Organisation/Company CNRS, Institut de Chimie de la Matière de Condensée de Bordeaux Research Field Chemistry Engineering Engineering » Communication engineering Researcher Profile Recognised Researcher (R2) Leading Researcher (R4) First Stage Researcher (R1) Established Researcher (R3) Application Deadline 10 Sep 2026 - 22:00 (UTC) Country France Type of Contract Temporary Job Status Full-time Offer Starting Date 1 Oct 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 amount of data exchanged is growing rapidly, and new solutions are needed to increase telecommunications capacity. To support the growth of telecommunication, it is necessary to produce a significant research and innovation effort in the field of materials and components. National effort has been launched to address the increasing bandwidth requirements, both for long haul and local area networks, and recent developments in the telecom fiber industry and diode laser technology.

Within this context, the research program aims to develop new, highly doped phosphate, tellurite, or germanate glasses and to fabricate optical fibers to expand the frequency bandwidth accessible for telecommunications. Funded under the PEPR 5G PLEIADES (France 2030 plan), a program seeks to extend the emission spectrum of amplifiers and lasers. The research will be conducted by two laboratories, ICMCB in Bordeaux and ICB in Dijon, which specialize in the synthesis, shaping, and characterization of glasses and optical fiber for photonics. Well-chosen composition of special glasses offer numerous advantages over silicate glasses, primarily related to the ability to incorporate very high concentrations of dopants without active ion aggregation. New glass composition and glass ceramics adapted to doping will be explored. In the specific case of glass ceramics, the goal is to disperse nanometer-sized doped crystallites within glasses with moderate glass transition temperatures. Compositions will be selected based on their fiber-laying capacity. The partners will undertake a material purification effort to fully leverage the advantages this type of material will bring to fiber lasers. The high doping levels achieved allow for a reduction in the size of laser systems, expansion of the spectral range and increased performance. Amplification tests will be conducted collaboratively by the partners of the PLEIADES consortium, which brings together the leading telecommunications partners in France.

Master in material chemistry or material science

Additional Information

Work Location(s)

Number of offers available 1 Company/Institute CNRS, Institut de Chimie de la Matière de Condensée de Bordeaux Country France City Pessac