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Portal > Offres > Offre UMR8630-RODLET-001 - H/F Post-doc SYRTE Laser ultrastable 1542 nm

M/F Post-doc SYRTE ultrastable laser 1542 nm

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

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General information

Reference : UMR8630-RODLET-001
Workplace : PARIS 14
Date of publication : Friday, June 19, 2020
Type of Contract : FTC Scientist
Contract Period : 18 months
Expected date of employment : 1 October 2020
Proportion of work : Full time
Remuneration : 2728-4323
Desired level of education : PhD
Experience required : Indifferent


The project consists in developing an ultrastable laser at 1542 nm based on a 40-cm long Fabry-Perot cavity equipped with crystalline mirrors, featuring a thermal noise sufficiently low to raise the prospect of fractional resolutions of a few 1e-17 at 1 s. The objective is to probe with this new master optical oscillator the 6 SYRTE atomic clocks at the stability limit allowed by the atomic quantum projection noise, therefore opening the way towards all-optical timescales.


The candidate will be in charge of implementing optical and seismometric methods to reach the noise limit of the long cavity. She/he will also develop operational setups to transfer the stability obtained at 1542 nm to 698 nm and 265.5 nm (to probe respectively Sr and Hg cold atoms in the 3 SYRTE optical lattice clocks), and to 9.2 GHz and 6.8 GHz (respectively for Cs and Rb cold atoms in the 3 SYRTE microwave fountains). She/he will quantify the metrological performance of the resulting signals, and closely work with the clock teams in order to experimentally and theoretically study the resolution clock comparisons can reach with the provided signal.


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

Work Context

The SYRTE cavities/combs group is composed of approx. 4 people. This 1542 nm source will be at the heart of the SYRTE metrological architecture: a good team spirit, as well as a good knowledge of English, are therefore absolutely necessary.

Additional Information

The position is funded by the EMPIR Joint Research Project ROCIT (, a European collaboration focused on experimental timescales based on optical atomic clocks.

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