Commissariat a L'energie Atomique Et Aux Energies Alternatives

Bruno Charrat

Jean-François Mainguet

Jean-Michel Leger

William Fourcault

Emmanuel Defay

Guy-Michel Parat

Alain Chambron

The laser comprising an optical fiber having two ends of which a first whereby the light is to be received, and a doped section for absorbing at least part of the light received via the first end and emitting light, the method includes: applying a torsion angle to the optical fiber; supplying light having a pump power at the first end of the optical fiber; checking that the Polarization Extinction Ratio of the light output from the first end of the optical fiber remains greater than a predetermined value throughout a predetermined range of the pump power; and, if the Polarization Extinction Ratio remains greater than the predetermined value throughout the predetermined range of the pump power, attaching the optical fiber to a mechanical mount at two attachment points of the optical fiber situated on either side of the doped section, with the torsion angle applied to the optical fiber.

Method for manufacturing an optical fibre laser

A laser includes an optical fiber having two ends of which a first end is configured to receive light therethrough, and a doped section configured to absorb at least part of the light received by the first end and for emitting light. The laser further includes a heat-conducting material which coats at least the doped section of the optical fiber.

Optical fiber laser and method for manufacturing an optical fiber laser

A transducer for transducing time-related temperature variations into a difference in potentials includes an upper conductive electrode designed to be exposed to a time-related temperature variation to be measured, a lower conductive electrode, and at least one layer of pyroelectric material based on a III-V nitride directly interposed between the upper and lower conductive electrodes to generate, between the upper and lower conductive electrodes, a difference in potentials corresponding to the temperature variation even in the absence of external mechanical stress.

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Saint-Egreve, France

Bruno Charrat