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

Abstract: A generator of short optical pulses includes: a generator of optical pulses with a wavelength equal to ?/2 and a spectral width less than ?/3; a generator of optical pulses of a duration less than 10 picoseconds at a wavelength ?/3; a device for recombining the pulses from the generators; a parametric amplification device receiving the output of the recombination device as input; a filter extracting, from the output of the amplification device, a band centered about a wavelength ?; a second harmonic generator receiving the output of the filter and generating a band centered over a wavelength ?/2; and a programmable device making it possible to temporally adjust the pulses corresponding to the bands, in order to allow for the generation of a pulse with a wavelength equal to ?/3 and of a duration less than the period of the optical cycle.

Abstract: A system for generating short optical pulses having a very high temporal contrast at a wavelength ?, includes: a generator of optical pulses B1 outputting pulses at a wavelength substantially equal to ?; a generator of optical pulses P, B2 outputting pulses at a wavelength substantially equal to 2*?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 F2 extracting, from the output of the parametric amplification device A, a band centered about a wavelength equal to 2*?; a second harmonic generator NL receiving the output of the filter F2, at the input; a filter F3 centered about a wavelength equal to ?, extracting the second harmonic wavelengths of the pulses produced by the second harmonic generator NL.

Abstract: A device for the temporal shaping of the amplitude and phase of ultrashort pulses, includes: —a birefringent waveguide 1 of main axis ? consisting of a nematic liquid crystal 2 located between a photoconductive material 3 and a substrate 4, —two transparent electrodes, one of which 5 is located between the nematic liquid crystal 2 and the substrate 4, and the other 6 such that the photoconductive material 3 is located between the other electrode 6 and the nematic liquid crystal 2, and —projection optics 7 for projecting a programmable optical mask 8 onto the photoconductive material 3.

Abstract: A system for generating short optical pulses having a very high temporal contrast at a wavelength ?, includes: a generator of optical pulses B1 outputting pulses at a wavelength substantially equal to ?; a generator of optical pulses P, B2 outputting pulses at a wavelength substantially equal to 2*?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 F2 extracting, from the output of the parametric amplification device A, a band centered about a wavelength equal to 2*?; a second harmonic generator NL receiving the output of the filter F2, at the input; a filter F3 centered about a wavelength equal to ?, extracting the second harmonic wavelengths of the pulses produced by the second harmonic generator NL.

Abstract: Generator of short optical pulses includes: a generator of optical pulses with a wavelength equal to ?/2 and a spectral width less than ?/3; a generator of optical pulses of a duration less than 10 picoseconds at a wavelength ?/3; a device for recombining the pulses from the generators; a parametric amplification device receiving the output of the recombination device as input; a filter extracting, from the output of the amplification device, a band centred about a wavelength ?; a second harmonic generator receiving the output of the filter and generating a band centred over a wavelength ?/2; a programmable device making it possible to temporally adjust the pulses corresponding to the bands, in order to allow for the generation of a pulse with a wavelength equal to ?/3 and of a duration less than the period of the optical cycle.

Abstract: A device for the temporal shaping of the amplitude and phase of ultrashort pulses, includes: a birefringent waveguide 1 of main axis ? consisting of a nematic liquid crystal 2 located between a photoconductive material 3 and a substrate 4, two transparent electrodes, one of which 5 is located between the nematic liquid crystal 2 and the substrate 4, and the other 6 such that the photoconductive material 3 is located between the other electrode 6 and the nematic liquid crystal 2, and projection optics 7 for projecting a programmable optical mask 8 onto the photoconductive material 3.

Abstract: A device for compensating time dispersions applied to the generation of ultra-short pulses, includes: two transparent optical diffraction gratings (RA, RB), which are identical and parallel to each other, operating on the principle of the Bragg diffraction, and two identical prisms (PA, PB), placed head to tail, in the space separating the optical diffraction gratings (RA, RB), knowing that the outer faces (FeA, FeB) of the prisms are parallel to each other and form a non-zero angle (?) with the faces of the optical diffraction gratings.

Abstract: 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.

Abstract: Device for adaptation of a programmable generator of ultra short wide spectral band light pulses, to long narrow spectral band light pulses comprising a laser source (1) of ultra-short wide spectral band pulses, a device (2) for dispersion of ultra-short pulses output from said laser source (1), a first non-linear optical mixer (4) to mix long modulated pulses output from said dispersion device (2) with long quasi-monochromatic signals output from a pure frequency pump laser (3), a generator (5) of wide spectral band light pulses placed on a first channel (V1), a second non-linear optical mixer (6) to mix the channel output from said generator (5) and a second channel (V2) emerging from said first non-linear optical mixer (4).

Abstract: The method and device for measuring the spectral phase or combined spectral and spatial phases of ultra short light pulses, consisting of performing: a decomposition of the light pulse to be measured in two identical replies 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, a spectral interferometry measurement by recombination of this secondary reference pulse and the signal pulse with a given temporal offset.