Centre National Detudes Spatiales

Office National D'etudes Et De Recherches Aerospatiales

Xavier Orlik

François Lemaître

Philippe Hébert

Thibault Dartigalongue

François LEMAÎTRE

François Lemaitre

Linda Mondin

A method of generating frequency combs composed of a predetermined number of rays, wherein the method includes the modulation of a main ray generated by a laser source (), by a first radiofrequency signal at a first frequency value, by a second radio frequency signal at a second frequency value, and by a third radio frequency signal at a third frequency value. The second frequency value is equal to twice the first frequency value. The third frequency value is equal to three times the first frequency value.

Method of frequency comb generation, associated generation module, remote spectroscopy method and associated spectroscopy device

Disclosed is a remote spectroscopy device of the LIDAR type including a module for generating an emission signal, an emission module for sending the emission signal toward a targeted material, a receiving module for receiving a response signal and a module for postprocessing of the response signal to determine a composition of the targeted material. The generating module includes at least two laser sources, each laser source being able to generate a laser signal at a predetermined wavelength, an upstream mixer able to mix the laser signals generated by the different laser sources, and a first modulator able to modulate the composite signal at a first modulation frequency to form the emission signal.

Remote spectroscopy device with a composite laser source and associated remote spectroscopy method

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Pechabou, France

Xavier Orlik