公开(公告)号：US09823542B2

公开(公告)日：2017-11-21

申请号：US15039045

申请日：2014-11-28

Applicant: FASTLITE

Inventor： Nicolas Forget

IPC: G02F1/39 ,  G02F1/35 ,  G02F1/37

CPC classification number: G02F1/39 ,  G02F1/353 ,  G02F1/37 ,  G02F2001/3507 ,  G02F2001/392 ,  G02F2201/16 ,  G02F2203/26

Abstract: A system for generating short optical pulses having a very high temporal contrast at a wavelength λ, includes: a generator of optical pulses B1 outputting pulses at a wavelength substantially equal to λ; a generator of optical pulses P, B2 outputting pulses at a wavelength substantially equal to 2*λ3; 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*λ; a second harmonic generator NL receiving the output of the filter F2, at the input; a filter F3 centered about a wavelength equal to λ, extracting the second harmonic wavelengths of the pulses produced by the second harmonic generator NL.

公开(公告)号：US09678373B2

公开(公告)日：2017-06-13

申请号：US14781484

申请日：2014-03-31

Applicant: FASTLITE

Inventor： Pierre Tournois ,  Nicolas Forget

IPC: G02F1/035 ,  G02F1/13 ,  G02F1/01 ,  G02F1/135 ,  G02B6/10 ,  G02B21/00 ,  H01S3/00

CPC classification number: G02F1/1326 ,  G02B6/105 ,  G02B21/0084 ,  G02F1/0126 ,  G02F1/135 ,  G02F2203/26 ,  H01S3/0057

Abstract: A device for the temporal shaping of the amplitude and phase of ultrashort pulses, includes: —a birefringent waveguide 1 of main axis Δ 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.

公开(公告)号：US10073321B2

公开(公告)日：2018-09-11

申请号：US15100003

申请日：2014-11-28

Applicant: FASTLITE

Inventor： Nicolas Forget

IPC: G02F1/39 ,  G02F1/37 ,  G02F1/35 ,  G02F1/11 ,  H01S3/00 ,  H01S3/10

CPC classification number: G02F1/39 ,  G02F1/116 ,  G02F1/353 ,  G02F1/37 ,  G02F2001/3507 ,  G02F2001/392 ,  G02F2203/26 ,  H01S3/0057 ,  H01S3/0092 ,  H01S3/10

Abstract: A generator of short optical pulses includes: a generator of optical pulses with a wavelength equal to λ/2 and a spectral width less than λ/3; a generator of optical pulses of a duration less than 10 picoseconds at a wavelength λ/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 λ; a second harmonic generator receiving the output of the filter and generating a band centered over a wavelength λ/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 λ/3 and of a duration less than the period of the optical cycle.