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

Office National D'etudes Et De Recherches Aerospatiales

Didier Fleury

Laurent Lombard

Guillaume Canat

William Renard

Julien Le Gouët

Julien Le GOUËT

According to one aspect, the invention relates to a device comprising an optical fiber having a high Brillouin threshold, said device including an optical fiber () suitable for propagating a high-power optical signal beam, means () for coupling a signal beam to an entrance end of the optical fiber () and a tubular structure () comprising at least one first tube () and at least one first adhesive material (). According to the present description, at least one portion of the optical fiber is immobilized in the tubular structure () by means of the first adhesive material (), which adheres both to the internal surface of the first tube () and to the external surface of the optical fiber (). Furthermore, at room temperature and with no other external stresses on the device, the immobilized portion of the optical fiber () is maintained in a compressive state by the tubular structure, the compressive state being such that the relative deformation of the optical fiber is negative or zero in its portion immobilized in the tubular structure, the maximum value of the relative deformation of the immobilized portion of the optical fiber being higher in absolute value than 0.3%.

Device comprising an optical fiber having a high brillouin threshold and method for manufacturing such a device

According to one aspect, the invention relates to an optic fiber amplifier having a high Brillouin threshold, and including: an amplification optic fiber () comprising a core and a sheath and suitable for amplifying a signal beam travelling in said core; means for coupling the signal beam in an input end of said amplification optic fiber; means for coupling a pump laser beam for pumping said amplification optic fiber; a structure () including a deformable portion around which at least one portion of said amplification optic fiber is wound in the shape of turns, said turns being in contact with a surface of said deformable portion, wherein the friction of said optic fiber on said surface resulting, during the deformation of said deformable portion, in an elongation of said amplification optic fiber according to an elongation profile that varies from one turn to the other.

Optic fiber amplifier having a high Brillouin threshold and method for making such an amplifier

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Clamart, France

Didier Fleury