Thales

Sébastien Laux

Paul Jougla

Stéphane Branly

François Lureau

Christophe Simon-Boisson

Mathilde Charbonneau

Olivier Casagrande

Christophe Derycke

Alain Pellegrina

Sandrine Ricaud

An M-output, where M&#x3e;1, chirped pulse amplification chain that includes a stretcher of stretching factor tx_stretch, M amplifiers in cascade, M output compressors respectively placed at the output of each amplifier, wherein it comprises: a partially compressing device placed between the stretcher and the first amplifier, this partially compressing device having at least one partial compression factor, the one (or more than one) partial compression factor(s) being lower than tx_stretch, and an optical switch configured to receive a beam output from the stretcher and to direct it directly to the first amplifier of the cascade or to the partially compressing device depending on the output compressor chosen among the output compressors.

Multi-output chirped amplification chain

A device for the sampling of a pulsed laser beam of high energy, typically greater than 1 J, and of large size, having a diameter typically greater than 1 cm, combined with a compressor, comprises, upstream of the compressor: a sample-taking device provided with a sampling diopter capable of transmitting T % of the pulsed laser beam, T being greater than 90, and of reflecting (1&#x2212;T) % of the pulsed laser beam, the reflected beam being called sampled beam, an afocal capable of reducing the size of the sampled beam, the compressor having a determined useful aperture, a device for reinjecting the reduced sampled beam into this useful aperture.

Device for sampling a large, high-energy laser beam combined with a compressor comprising a sample-taking device with a sampling diopter

A device for amplifying a multi-wavelength pulsed laser beam is provided, which comprises: a solid amplifying medium with two planer faces, a front face and a reflecting rear face; and a device for cooling the amplifying medium by the rear face. The front face of the amplifying medium is tilted relative to its rear face by a first non-zero tilt and the device further comprises a trapezoidal prism, with an input face and an output face which form between them a second non-zero tilt, the first and second tilts being such that the beams of each wavelength are parallel to one another at the output of the prism.

Device for amplifying a laser pulse having improved temporal contrast

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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Palaiseau, France

Sébastien Laux