En poursuivant votre navigation sur ce site, vous acceptez le dépôt de cookies dans votre navigateur. (En savoir plus)
Portail > Offres > Offre UMR6174-SARDJA-007 - H/F Chercheur Post-doc

M / F Post-doc Researcher

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

Date Limite Candidature : mercredi 9 décembre 2020

Assurez-vous que votre profil candidat soit correctement renseigné avant de postuler. Les informations de votre profil complètent celles associées à chaque candidature. Afin d’augmenter votre visibilité sur notre Portail Emploi et ainsi permettre aux recruteurs de consulter votre profil candidat, vous avez la possibilité de déposer votre CV dans notre CVThèque en un clic !

Faites connaître cette offre !

General information

Reference : UMR6174-SARDJA-007
Workplace : BESANCON
Date of publication : Wednesday, November 18, 2020
Type of Contract : FTC Scientist
Contract Period : 18 months
Expected date of employment : 18 January 2021
Proportion of work : Full time
Remuneration : monthly pay between 2100 et 3000 €
Desired level of education : PhD
Experience required : 1 to 4 years


The main duty will be to participate in the development of an ultra-stable laser based on cryogenic silicon cavity. The following tasks are identified:
- to measure and optimize the vibration sensitivity of the cavity.
- To optimize the detection stage and error signal (Pound-Drever-Hall).
- To reduce thermal perturbations acting on the cavity.
- To study the motion of the cavity housed in the cryostat (inducing Doppler effect) and to implement compensation techniques.
- Laser power stabilization.
- Transfer of the optical signal without degradation of performances.
- Metrological characterization of the cavity-stabilized laser (frequency stability and phase noise) using ultra-stable references available in the laboratory: ultra-stable laser, cryogenics sapphire oscillators and optical frequency combs.
- Contribution to the writing of peer-reviewed articles and presentations at international conferences.


Experimental work in a time and frequency metrology laboratory:
- frequency stabilization of lasers.
- Characterization of low noise lasers.
- Diffusion and communication of results.


- Optical frequency metrology
- Gaussian optics in free-space
- Analog, digital and radio-frequency electronics
- Control theory and locking/feedback techniques
- Instrumentation
- Cryogenic and ultra-high vacuum
- Analysis and interpretation of noise and sources of noises

Work Context

The candidate will integrate the OHMS team (about 25 people, http://teams.femto-st.fr/equipe-ohms/) in the time and frequency department of FEMTO-ST (www.femto-st.fr). An important activity is the development of optical references such as cavity stabilized lasers, single ion optical clock (Yb+), Supperradiant ultra-stable laser and cesium cells stabilized lasers. The candidate will have the support of electronic, IT and mechanical workshop of FEMTO-ST. A measurement platform dedicated to the short term frequency stability and ultra-low phase noise will be also available (http://oscillator-imp.com/dokuwiki/doku.php).

Constraints and risks

Laser radiation exposure

Additional Information

Workplace: Besançon, ENSMM, Département Temps-Fréquence (FEMTO-ST)

We talk about it on Twitter!