Universitë De Bordeaux

Commissariat a L'energie Atomique Et Aux Energies Alternatives

Centre National De La Recherche Scientifique

Institut Polytechnique De Bordeaux

Centre Nationale De La Recherche Scientifique

Institut D'optique Graduate School

Ecole Nationale Superieure Des Arts Et Metiers

Ecole Nationale Superieure D'arts Et Metiers (Ensam)

Irisiome

Université Bordeaux 1

Jérôme Lhermite

Eric Cormier

Romain Royon

Denis Marion

Dominique Descamps

Philippe Balcou

Bertrand Audoin

Giorgio Santarelli

Guillaume Machinet

Yannick Guillet

Christophe Feral

Jérémy Brandam

Romain Dubrasquet

Adrien Aubourg

A laser amplifier head is provided. The laser amplifier head includes a plurality of plates of a solid-state laser active medium disposed in a housing, arranged parallel to one another with their main surfaces facing one another, the housing being provided with an inlet port and an outlet port for a cooling liquid, and also at least one window allowing a laser beam to pass through the laser active medium plates, wherein it also includes:

High-power laser amplifier head

Disclosed is an acoustic resonance spectrometry system for analysing a sample, which includes an optical pump-probe device adapted to generate a pump beam and a probe beam, the pump beam being consisted of a series of ultra-short pump light pulses having a repetition frequency in the spectral domain of the gigahertz, the pump beam being directed towards an optoacoustic transducer to generate a periodic grating of coherent acoustic phonons in the sample, the probe beam being directed towards the sample to form a scattering beam of the probe beam on the grating of phonons, a frequency variation device being adapted to vary the repetition frequency of the pump beam in a spectral range and a photo-detection system configured to measure a scattering signal as a function of the repetition frequency in the spectral range.

Acoustic resonance spectrometry system and method

The invention relates to an optical pumping device comprising: a fibre light source emitting controlled radiation having a very high transverse modal quality, with a wavelength shorter than 1000 nm; at least one element consisting of an amplifying material doped with a rare earth dopant; means for introducing a pumping light into said doped amplifying material element; and means for cooling said amplifying material. Said optical pumping device is characterised in that the pumping light is emitted by the fibre light source with an average power of higher than 2W and a modal quality characterised by an M2&#x3c;5 factor.

Optical pumping device

Growing community of inventors

Anglet, France

Jérôme Lhermite