Fastlite

Centre National De La Recherche Scientifique

Nicolas Forget

Daniel Kaplan

Pierre Tournois

Thomas Oksenhendler

Aurélie Jullien

Vittorio Di Pietro

The present invention is notably directed to methods and systems for generating a CEP-stable optical pulse of optical carrier frequency ffrom input optical pulses, the input optical pulses having an optical carrier frequency fand pulse duration T. A birefringent medium, a non nonlinear medium, a dispersive optical system, a parametric device (DFG) are successively used to achieve the generation.

Compression-free and single-beam generation of a carrier-envelope phase-stable optical pulse

A generator of short optical pulses includes:

System for generating short optical pulses of a duration shorter than the period of the optical carrier using the principle of parametric amplification

A system for generating short optical pulses having a very high temporal contrast at a wavelength &#x3bb;, includes: a generator of optical pulses Boutputting pulses at a wavelength substantially equal to &#x3bb;; a generator of optical pulses P, Boutputting pulses at a wavelength substantially equal to 2*&#x3bb;3; a device R for recombining the pulses from the generators; a parametric amplifier A receiving the output of the recombination device R as an input; a filter Fextracting, from the output of the parametric amplification device A, a band centered about a wavelength equal to 2*&#x3bb;; a second harmonic generator NL receiving the output of the filter F, at the input; a filter Fcentered about a wavelength equal to &#x3bb;, extracting the second harmonic wavelengths of the pulses produced by the second harmonic generator NL.

Generator of short optical pulses having a very high temporal contrast

A device for the temporal shaping of the amplitude and phase of ultrashort pulses, includes: &#x2014;a birefringent waveguideof main axis &#x394; consisting of a nematic liquid crystallocated between a photoconductive materialand a substrate, &#x2014;two transparent electrodes, one of whichis located between the nematic liquid crystaland the substrate, and the othersuch that the photoconductive materialis located between the other electrodeand the nematic liquid crystal, and &#x2014;projection opticsfor projecting a programmable optical maskonto the photoconductive material

Device for the temporal shaping of the amplitude and phase of ultrashort light pulses

The method and device for measuring the spectral phase or combined spectral and spatial phases of ultra short light pulses, consisting of a decomposition of the light pulse to be measured in two identical replicas called signal pulse and primary reference pulse, respectively, of different polarization or direction and the phase characteristics of which are essentially identical to the original pulse, a temporal filtering of the primary reference pulse by a nonlinear interaction generating a secondary reference pulse of average frequency essentially identical and of spectral width greater than the spectral width of the primary reference pulse, and a spectral interferometry measurement by recombination of this secondary reference pulse and the signal pulse with a given temporal offset.

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Nice, France

Nicolas Forget