Patent ID: 9046368
Filing Date: 2015-06-02
Classification: G01C,G01P,G01V,G21K

Abstract:
1. A method of measurement by means of atom interferometry, in which several interactions between a laser radiation and atoms are successively caused, the atoms progressing over a path which is not situated in a plane perpendicular to an axis of propagation of the laser radiation, so as to form an interferometer for the atoms, applying laser radiation used for each interaction at different positions of the atoms on their path, comprising at least one first and one second monochromatic components with respective frequencies which are distinct, so that the interaction is of two-photon Raman type, with an absorption and an emission each stimulated by the first or the second monochromatic component, the first monochromatic component being part of an initial laser radiation, and the second monochromatic component resulting from a modulation of said initial laser radiation at a determined modulation frequency, wherein a distance between any two of the positions at which interactions are caused, the distance measured along the axis of propagation of the laser radiation, is a multiple of a modulation length to within ±10% of this modulation length, and said modulation length is equal to the velocity of propagation of the laser radiation divided by twice the determined modulation frequency.