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Portail > Offres > Offre UMR6174-SARDJA-001 - Chargé de Recherche H/F en Métrologie des Fréquences Optiques

Post doctoral researcher in optical frequency metrology

This offer is available in the following languages:
Français - Anglais

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General information

Reference : UMR6174-SARDJA-001
Workplace : BESANCON
Date of publication : Tuesday, December 04, 2018
Type of Contract : FTC Scientist
Contract Period : 6 months
Expected date of employment : 1 March 2019
Proportion of work : Full time
Remuneration : from 2200 € to 2500 € before taxes
Desired level of education : PhD
Experience required : 1 to 4 years


The missions are the following:
- Finalize the implementation of the reference optical signal based on an ultra-stable laser, a hydrogen maser and a femtosecond laser.
- Ensure the dissemination of this signal within the laboratory and at national level through the refimeve+ network.
- Ensure signal integrity using frequency comparisons with other laboratory references.
- Contribute to the characterization of the refimeve+ network and to experiments setup by members of the collaboration.


- Optical frequency metrology
- Laser frequency stabilization
- frequency caracterization of low noise lasers


- Frequency and phase noise measurement
- Frequency, phase, power, temperature stabilization (analog and digital servo control)
- Electronics (DC-RF), photonics and instrumentation
- Guided and free space optics
- Analysis / interpretation of noise
- Basic knowledge of femtosecond lasers for time-frequency metrology

Work Context

The candidate will work in the time-frequency department of the FEMTO-ST institute (Besançon). This department of about 60 people (hosted at ENSMM) works on the realization of systems (oscillators, filters, sensors) based on electro-acoustic resonators integrated on the substrate, high performance quartz resonators and finally oscillators (micro-waves and optics) and atomic clocks. OHMS Team that the candatate will join is dedicated to the development of these oscillators and clocks.
Among the many experiments of this team we can list the following:
- lasers stabilized on high-precision cavities (ultra-stable laser)
- cryogenic sapphire oscillators
- generation of microwave signals from optics
- optical clock to ion trapped ytterbium.

The department is also connected to the refimeve+ network that aims to disseminate ultra-stable optical signals from frequency references. Such a reference signal can be generated by combining the signals of ultra-stable lasers and hydrogen masers using a femtosecond laser.

Constraints and risks

Exposure to laser radiation

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