Maxime Favier will defend his thesis on 11th october 2017 at IAP (Paris) at 14:00 on the subject “Mercury optical lattice clock: from high-resolution spectroscopy to frequency ratio measurements”, realized at the SYRTE under the direction of Sébastien Bize and supervised by Sébastien Bize and Luigi De Sarlo.
The defense will take place in room “Salle des séminaires” of the “Institut d’Astrophysique de Paris” (IAP) located 98 bis boulevard Arago, 75014 Paris, in front of a jury composed of Martina Knoop, Leonardo Fallani, Thomas Udem, Philippe Grangier and Jean-Michel Raimond.
The defense will be in english.
Théo Laudat will defend his thesis on 4th october 2017 at IAP (Paris) at 14:00 on the subject « Spontaneous spin squeezing in a spinor Bose-Einstein condensate trapped on an atom chip ». This work has been done in SYRTE under the supervision of Noel Dimarcq, Peter Rosenbusch, Carlos Garrido Alzar and Jakob Reichel.
The defense will be in english.
Download videos presenting two Equipex (“Equipements d’Excellence” of the French Programme Investissements d’Avenir) in relation with FIRST-TF activities
REFIMEVE+: a metrological fiber network
MIGA: a giant atom interferometer
Nicolas VON BANDEL will defend his thesis on 30 June 2017 at 14:00, 0C-140 (Auditorium) – III-V Lab Campus Polytechnique 1 avenue Augustin Fresnel 91767 Palaiseau on the subject “Development and study of low noise laser diodes emitting at 894 nm for compact cesium atomic clocks”. This work was a collaboration between Institut d’Electronique et des Systèmes (Montpellier) and III-V Lab (Palaiseau).
Abstract : This PhD work deals with the design, the fabrication and the study of high-coherence semiconductor laser sources emitting at 894 nm, for application to compact, optically-pumped cesium atomic clocks in an industrial context. We are particularly interested in the electrically pumped ”Distributed-Feedback” in-plane laser diodes (DFB). The aim is to obtain a low-threshold, single-mode laser with high optical efficiency and a linewidth of less than 1 MHz. We first deal with the design and first-order characterization of the DFB diodes until they are put into modules for the clock. We then carry out an in-depth study of the physical properties of the laser emission in terms of coherence time. For that purpose, a new universal method for characterizing the optical frequency noise is introduced. Finally, we look further into the spectral properties of the emission in a servo configuration on a fluorescence line of the cesium (”Dither-Locking”). We show that the intrinsic properties of the component satisfy the requirements of the industrial system as defined in the study.
Keywords : Laser diodes, low noise, 894nm, cesium atomic clocks, frequency noise metrology, linewidth in servo
Within the framework of the CNES CCT “Optics and Optoelectronics Technical Center” and the “Material Technical Center”, a Workshop on Optical Materials by SCHOTT, HERAEUS and HELLMA, will be organized on 22nd & 23rd June 2017 at CNES (Room Leonard de Vinci), Toulouse.
The first day (Thursday 22nd june) will be about all optical materials: Optical Glass, Filter Glass, Coated Filters, Fused Silica and Calcium Fluoride
The second day (Friday 23rd june) will be dedicated to Zerodur® and Infrared optical materials.
The attached agenda details the different items that will be presented. Questions and open discussions will conclude each point.
Register deadline: june 14th.
Detailed program and Registration link : http://cct.cnes.fr/content/cct-ooe-20170622-optical-materials
If you are not member of the European Union and you wish to attend this workshop, please contact: Cedric VIRMONTOIS, Optical CCT manager (email@example.com)
First “call for papers” of the 31st European Frequency and Time Forum and the 71st consecutive meeting of the IEEE International Frequency Control Symposium which will be held as our 7th joint conference in Besançon, France, July 9th-13th 2017
Abstract submission deadline: March 3, 2017
It will be openly available until the end of 2016 and can be obtained from:
This workshop, organized by Olivier Dullieu (LAC) and Laurent Hilico (LKB), follows the workshops organized in Sandbjerg (Denmark) in 2011, Arosa (2013) and Bad Honnef (2015), and focuses on cold molecular ion physics.
Within a five half-days program with invited and selected oral contributions as well as poster sessions, it will address recent experimental and theoretical achievements in molecular ion spectroscopy, molecular ion-neutral collisions, cold chemistry, quantum logic protocols towards precision measurements and fundamental constant determination.
The participation of young researchers in the field is strongly encouraged. The attendance is limited to 70 persons, so early registration is recommended.
The website of this conference supplies further information about registration, deadlines, venue and submission of contributions. It can be found at http://www.lkb.upmc.fr/iontrap/2017-cold-molec-ion-home/
6 June 2016 (Besançon) – Thesis defense of Alexandre DIDIER : “Development of ultra-stable Fabry-Perot cavities for new generation optical frequency standards”
10 June 2016 (Paris) – Thesis defense of Stéphane TREMINE : “Study of Cesium atoms cooling in a 3D speckle laser field and realization of a compact atomic clock”.