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TIME & FREQUENCY : Post-Doctoral Researcher

Mission : 

The mission is to conduct the experimental study on a new generation of ultra-stable optical Fabry-Perot cavity. This, made of monocrystalline silicon and operated at a temperature below 1 K, must be used as a frequency reference for the realization of an ultra-stable laser. This optical resonator should pave the way for future ultra-stable lasers with frequency stabilities lower than 10-17 in relative value.
The first step is to install the cavity in the cryostat and to perform the frequency control of a laser source allowing access to its properties. The fine measurement of the latter constitutes the second part of the mission. The last phase focuses on a first characterization of the performance of such a frequency reference in order to demonstrate its potential.

General Informations : Reference: UMR6174-SARDJA-008
Place of work: BESANCON
Date of publication: Tuesday, September 7, 2021
Type of contract: Scientific CDD
Contract duration: 18 months
Expected date of employment: October 15, 2021
Work quota: Full time
Remuneration: 3768 and 3938 according to experience
Desired level of studies: Doctorate
Desired experience: 1 to 4 years

Skills : The recruited person will guide and carry out the experimental work in accordance with the mission within a Time-Frequency metrology laboratory. Thus stand out the following activities:
- Scientific and technical achievement: installation of the mechanical retention of the cavity, of the optical device, and of the control electronics; laser frequency stabilization; characterization.
- Project management and management.
- Supervision of doctoral students, technicians ...
- Dissemination and presentation of results (writing of articles and international conferences).



Jacques MILLO - jacques.millo@femto-st.fr

+ d'infos :

Applied Mechanics : Probabilistic multi-scale and multi-objective optimization of wood/natural fiber composite hybrid laminates

Objective and tasks :
The main objective of this postdoctoral fellowship is the multi-objective optimization of wood/natural fiber composite hybrid laminates. To do so, the uncertainties and variability of the input parameters will be considered at different scales to maximize the bending strength and rigidity while minimizing the areal weight of the resulting hybrid laminates. The approach will, in particular, consider the spatial heterogeneity of the orthotropic elastic properties of wood veneers, the uncertainties on the nominal elastic properties of plant fiber composite plies and on the geometrical of wood and composite plies. The work will be performed by using a numerical tool developed in the team, based on Finite Elements Analysis and an in-house software developed for uncertainty propagation.

Profile required
▪ PhD thesis related to the mechanical modelling of composite materials and/or wooden materials.

▪ Proficiency in sensitivity analysis for optimization problems.

▪ Softwares: proficient with Matlab and FEM (ABAQUS)

▪ Curious, self-motivated, hard-worker

▪ English: fluent reading, writing and speaking with ease

Duration12months (December2021–November2022)

Salary (gross annual) : 32K€