11th of October 2017 (Paris) – PhD defense of Maxime Favier

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.

⇒ More information

Winter school on Physics with Trapped Charged Particles, 8-19 January 2018, Les Houches

In continuing the successful Winter School on the Physics with Trapped Charged Particles held in Les Houches (France) in January 2012 and 2015 (lecture notes available) we are happy to announce the third such school to be held this coming January 2018.  The school will take place from January 8-19, 2018 and applications are now open.
Deadline for applications: September 17th

⇒ More details about the school

30 June 2017 – Thesis defense of Nicolas VON BANDEL

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

Workshop on Optical Materials by SCHOTT, HERAEUS and HELLMA

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 (cedric.virmontois@cnes.fr)

 

Workshop “Spectroscopy, Dynamics and Applications of Cold Molecular Ions”

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/