摘要:
The present invention relates to a high-voltage pulse generator comprising a “frozen-wave” generation system (1) for generating high-voltage pulses and a trigger system (2) for triggering said pulses, said generation system (1) comprising a first (14) and a second (15) photoconductor element, characterized in that said triggering system (2) comprises means (21) for generating a laser light beam (F) and means (22, 23) for splitting said laser beam (F) into two laser beam fractions (F1, F2), each laser beam fraction (F1, F2) being directed onto a photoconductor element (14, 15) of the generation system (1), said splitting means (22, 23) being capable of controlling the distribution of the respective powers of said two laser beam fractions (F1, F2) as a function of the orientation of the polarization of the laser beam (F). The present invention also relates to a facility comprising multiple high-voltage pulse generators and electrooptic pump-probe equipment operating such a high-voltage pulse generator.
摘要:
The object of the invention is to provide a method and a device for characterizing microscopic elements, which is both reliable and inexpensive and which gives good results when there is a large number of elements to be characterized. For this purpose, the invention proposes chopping the source signal (12, 120) by means of MOEMS microsystems (200) based on optoelectromechanical elements (220), thereby generating novel options for the modulation, especially temporal modulation, of excitation signals. More precisely, one subject of the invention is a method of characterizing microscopic elements consisting in particular in propagating a dispersed lamp source signal (12, 120), in spatially chopping the spectrum of the source signal (12, 120) into at least two excitation signals (18, 180) having predetermined wavelengths λi, in encoding the excitation signals (18, 180), in focusing the excitation signals (18, 180), so as to generate a probe signal (28, 280) propagated towards a measurement zone (30, 300), and in analyzing an interaction signal (32, 320) deriving from the interaction of the probe signal (28, 280) with the microscopic elements that are located in the measurement space (30, 300). The spatial chopping of the light source signal spectrum is carried out by a MOEMS microsystem (200) based on optoelectromechanical elements (220).
摘要:
The invention relates to a device for production of a polychromatic light, comprising optical pumping means and light guidance means. The optical pumping means are embodied to provide a first radiation at a first wavelength, characterised in comprising a selective injection means to inject said radiation into the guidance means, said guidance means being embodied to generate a harmonic corresponding to said selective injection and to provide a polychromatic light at an outlet by non-linear excitation of said first radiation and said harmonic.
摘要:
A generating device (DG) comprises: ⋅ a pulse laser source (SL) providing primary photons having at least one wavelength, ⋅ shaping means (MM) acting on the primary photons to provide an input beam, ⋅ a nonlinear crystal (CN), and ⋅ control means (MC) generating, in the nonlinear crystal (CN), at least one electric field that is synchronous with the input beam and suitable for inducing a phase mismatching in the nonlinear crystal (CN) through an electro-optical effect, in order to convert the primary photons of the input beam into secondary photons having wavelengths belonging to a supercontinuum.
摘要:
The present invention relates to a high-voltage pulse generator comprising a “frozen-wave” generation system (1) for generating high-voltage pulses and a trigger system (2) for triggering said pulses, said generation system (1) comprising a first (14) and a second (15) photoconductor element, characterized in that said triggering system (2) comprises means (21) for generating a laser light beam (F) and means (22, 23) for splitting said laser beam (F) into two laser beam fractions (F1, F2), each laser beam fraction (F1, F2) being directed onto a photoconductor element (14, 15) of the generation system (1), said splitting means (22, 23) being capable of controlling the distribution of the respective powers of said two laser beam fractions (F1, F2) as a function of the orientation of the polarization of the laser beam (F). The present invention also relates to a facility comprising multiple high-voltage pulse generators and electrooptic pump-probe equipment operating such a high-voltage pulse generator.
摘要:
The invention relates to a dedicated polychromatic light generating device (D). The inventive device (D) comprises optical pumping means (MP) which are used to deliver radiation with at least two different excitation wavelengths (μ1, μ2) and light-guiding means (GL) which are used to deliver polychromatic light at an output (SGL) when excited by the radiation in a non-linear interaction regime.
摘要:
- Guide d'onde multimode configuré pour générer une radiation monomode à partir d'une radiation monomode. - Le guide d'onde (1) présente un profil d'indice comprenant au moins un maximum, le ou les maxima du profil d'indice correspondant respectivement à au moins un maximum d'intensité de la radiation de sortie (11) à un mode d'ordre souhaité, le guide d'onde (1) présentant également au moins un ion dopant configuré pour absorber la radiation de pompe (31), le ou les ions dopants présentant un profil de concentration d'ions dopants comprenant au moins un maximum.