New concepts of inertial measurements with multi-species atom interferometry

In the field of cold atom inertial sensors, we present and analyze innovative configurations for improving their measurement range and sensitivity, especially attracting for onboard applications. These configurations rely on multi-species atom interferometry, involving the simultaneous manipulation of different atomic species in a unique instrument to deduce inertial measurements. Using a dual-species atom accelerometer manipulating simultaneously both isotopes of rubidium, we report a preliminary experimental realization of original concepts involving the implementation of two atom interferometers first with different interrogation times and secondly in phase quadrature. These results open the door to a new generation of atomic sensors relying on high performance multi-species atom interferometric measurements

Développement d'un capteur inertiel à atomes froids 87Rb/85Rb/133Cs

This thesis focuses on the development of a multi species atom interferometer in the framework of accelerometry. The thesis will mainly revolve around three points :1. The developement of a specific laser dedicated to cesium.2. The study and development of an overall laser system allowing the cooling and the manipulation of three atomic species: two rubidium isotopes (87Rb and 85 Rb) and a cesium isotope (133Cs).3. The development and the study of a three species atomic interferometer.Cette thèse porte sur le développement d'un interféromètre multi espèces à atomes froids dans le cadre de l'accélérométrie.La thèse porte principalement sur trois aspects :1. Le développement d'une source laser dédiée au césium.2. L'étude et le développement d'un système laser plus global qui permettra le refroidissement et la manipulation de trois espèces atomiques : deux isotopes du rubidium (87Rb et 85 Rb) et un isotope du cesium (133Cs).3. La mise au point et l'étude d'un interféromètre à trois espèces atomique