Thales

Christophe Derycke

Sébastien Laux

Stéphane Branly

Laurent Boudjemaa

Stéphane David

Eric Durand

A device for amplifying a laser beam along an axis comprises: an amplifying bar structure of index n, delimited by a surface connecting the input and output faces of the structure, having a dimension e along the axis and &#x3a6; along a perpendicular direction, with e&#x3c;&#x3a6;, and intended to be pumped to become a gain medium with a maximum along a face, and a liquid of index nwhich surrounds the structure in relation to its surface and which is absorbent or scattering at the fluorescence wavelength of the amplifying bar structure. The surface comprises a first tooth in the form of a chamfer at its junction with the maximum gain face, to avoid causing parasitic transverse lasing and the liquid of index nhas a heat capacity of greater than 3000 Joules per kilogram per K&#xb0; to dissipate the thermal power induced by the pumping.

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Paris, France

Christophe Derycke