Onera (Office National D'etudes Et De Recherches Aerospatiales)

Office National D'etudes Et De Recherches Aerospatiales

Onera

Alexandre Bresson

Nassim Zahzam

Yannick Bidel

Alexis Bonnin

Disclosed is a method for measuring an external parameter by atomic interferometry, using two sets of atoms that belong to different species. Two measurements are taken simultaneously at the same location, but independently from one another, in order to obtain two measurement results. One of these measurement results removes an indeterminacy among several possible values of the external parameter, by taking into account only the other measurement result. A method of this kind can be used to measure a coordinate of a gravitational field or a coordinate of an acceleration of the atoms.

Measurement by atomic interferometry with multiple species of atoms

A laser source () is intended for a device for interacting simultaneously with several atomic species within time intervals which are common to these species. The laser source includes a laser radiation generating set (), an optical amplifier (), and a frequency doubler set (). A component for time-division multiplexing () assign in alternation at successive time sub-intervals, initial radiations corresponding to interaction radiations dedicated to different atomic species. The result of the interactions with one of the atomic species is then identical to the result of the interactions with a continuous radiation dedicated to the atomic species.

Laser source, and apparatus and method for simultaneously interacting with a plurality of atomic species

Disclosed is a method for measuring an external parameter by atomic interferometry using two sets of atoms that belong to different species. Two measurements are taken simultaneously at the same location, but independently from one another, in order to obtain two measurement results. Constant phase shifts that appear in the atomic interferences for the two atom sets are quadrature-adjusted in order to ensure that one of the two measurements provides a value for the external parameter with satisfactory accuracy.

Measurement by means of atomic interferometry with multiple species of atoms

The invention relates to a measurement by means of atom interferometry, using a Raman source that is created by modulating a monochromatic laser source. By conveniently selecting positions in which interactions between atoms and a laser radiation, produced by the Raman source, are caused, it is possible to eliminate or at least reduce a measurement bias caused by supplementary components of the laser radiation. Such a measurement having eliminated or reduced bias can be used in an inertia sensor.

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Palaiseau, France

Alexandre Bresson