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Portail > Offres > Offre UMR8630-RODLET-002 - H/F Référencement optique d'une horloge Ytterbium à réseau appliquée à l'exploration géodésique

M/F Optical referencing of a transportable Ytterbium lattice clock applied to geodesy

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

Date Limite Candidature : lundi 7 décembre 2020

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General information

Reference : UMR8630-RODLET-002
Workplace : PARIS 14
Date of publication : Monday, October 26, 2020
Type of Contract : FTC Scientist
Contract Period : 18 months
Expected date of employment : 4 January 2021
Proportion of work : Full time
Remuneration : 2728-4323
Desired level of education : PhD
Experience required : Indifferent


The applicant (M/F) will be in charge of interfacing a compact optical frequency comb with a transportable Ytterbium lattice clock newly under development at SYRTE, Observatoire de Paris. The comb will allow the referencing of the clock to the large scale infrastructure REFIMEVE+ (optical fiber network disseminating an ultrastable reference at 1542 nm), in order to enable remote frequency comparisons with the ~12 stationary European optical clocks. Given the sensitivity of atomic clocks to the local gravitational potential, these measurements will notably result in a cartography of the Earth potential with an unprecedented resolution.


The candidate will be in charge of building the architecture (optical, microwave and programming aspects) necessary to evaluate the performance of the transportable comb with respect to the three optical combs already operational at LNE-SYRTE. She/he will assess the stability allowed by the transportable device, as well as the possible systematic uncertainties. The candidate will implement a comb-based frequency referencing of the lasers necessary to the cooling of neutral ytterbium (399 nm and 556 nm). She/he will develop the transfer of spectral purity from the ultrastable 1542 nm signal to 578 nm (metrological transition of Yb) and will evaluate the corresponding stability that can be delivered to the cold atoms. Finally, she/he will develop the first bricks of the automatizing and the complete remote control of the transportable ensemble (comb and clock).


The candidate must have completed a PhD in experimental physics. A strong interest for experimental work is necessary, an expertise in frequency combs, cw lasers, electronics and Python programming is required. Experience in ultrastable Fabry-Perot cavities is an asset. The candidate is expected to take responsibility in
the project.

Work Context

The SYRTE optical lattice clock team is composed of about 7 people. The Yb clock will benefit from the expertise acquired in the course of the construction of the three stationary optical clocks (2 based on Sr, 1 based on Hg). A good team spirit, as well as a good knowledge of English, are therefore absolutely necessary.

Additional Information

The position is funded by LNE (Laboratoire National de métrologie et d'Essais).
The project is funded by ANR (Agence Nationale pour la Recherche), and by DIM SIRTEQ (Science et Ingénierie en région Île-de-France pour les technologies quantiques )

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