Centre National De La Recherche Scientifique

Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Université De Caen Normandie

Ensicaen

Centre National De La Recherche Scientifique-cnrs

Patrice Camy

Jean-Louis Doualan

Virginie Nazabal

Alain Braud

Abdel Benayad

Jean-Paul Goossens

An active laser medium for emitting a light beam by laser effect includes an X—F2-doped crystal, wherein X is a chemical element from the alkaline-earth family and F is fluorine. The crystal is doped with trivalent ions including: a first category of optically active dopant ions, in which each dopant ion is an ion of a first rare earth; and a second category of optically inactive dopant ions, referred to as buffer ions, in which each dopant ion is an ion of a rare earth different from the first rare earth. The second category of dopant ions has at least ions of a second rare earth and ions of a third rare earth, different from one another. The invention provides an active laser medium that can be used to obtain both a desired emission spectrum shape and a high thermal conductivity.

Laser crystal with at least two co-dopants

The invention relates to a chemical species optical sensor comprising: a fluorescent source () of incoherent infrared rays, including a chalcogenide glass matrix, doped with rare earth ions and combined with a pump source by means of a first optical fiber (); and at least one infrared ray detector (), provided with a spectral selection device () and set up to detect the rays that are emitted by said fluorescent source and have passed through a detection area (), said detector including a fluorescent element () formed by a chalcogenide glass matrix that is doped with rare earth ions and combined with a second pump source () by means of a second optical fiber (). Such a sensor can be used for differentially detecting a chemical species, and in particular CO.

Chemical species optical sensor operating in infrared

Growing community of inventors

Caen, France

Patrice Camy