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1. WO2015193254 - DEVICE AND METHOD FOR CHARACTERIZATION OF A LIGHT BEAM

Publication Number WO/2015/193254
Publication Date 23.12.2015
International Application No. PCT/EP2015/063368
International Filing Date 15.06.2015
IPC
G01J 9/02 2006.1
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
9Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength
02by interferometric methods
G01J 11/00 2006.1
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
11Measuring the characteristics of individual optical pulses or of optical pulse trains
CPC
G01J 11/00
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
11Measuring the characteristics of individual optical pulses or of optical pulse trains
G01J 2003/4538
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
3Spectrometry; Spectrophotometry; Monochromators; Measuring colours
28Investigating the spectrum
45Interferometric spectrometry
453by correlation of the amplitudes
4538Special processing
G01J 3/453
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
3Spectrometry; Spectrophotometry; Monochromators; Measuring colours
28Investigating the spectrum
45Interferometric spectrometry
453by correlation of the amplitudes
G01J 9/0215
GPHYSICS
01MEASURING; TESTING
JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
9Measuring optical phase difference
02by interferometric methods
0215by shearing interferometric methods
Applicants
  • COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES [FR]/[FR]
Inventors
  • QUERE, Fabien
  • GALLET, Valentin
  • PARIENTE, Gustave
Agents
  • LEBKIRI, Alexandre
Priority Data
145547216.06.2014FR
Publication Language French (fr)
Filing Language French (FR)
Designated States
Title
(EN) DEVICE AND METHOD FOR CHARACTERIZATION OF A LIGHT BEAM
(FR) DISPOSITIF ET PROCEDE DE CARACTERISATION D'UN FAISCEAU DE LUMIERE
Abstract
(EN) One aspect of the invention concerns a method for characterization of a light beam, comprising the following steps: - separation of the light beam by means of a separator optic into a first sub-beam and a second sub-beam; - propagation of the first sub-beam over a first optic and of the second sub-beam over a second optic, said first and second optics being respectively arranged so that the first sub-beam on leaving the first optic, referred to as the "reference beam", and the second sub-beam on leaving the second optic, referred to as the "characterized beam", are separated by a time delay τ; - recombination of the reference beam and the characterized beam by means of a recombiner optic, in such a way that the beams spatially interfere and form a two-dimensional interference pattern, the two-dimensional interference pattern extending along a first plane; - measurement of the spectral frequency of at least one part of the two-dimensional interference pattern by means of a measurement system, - calculation of the Fourier transform in the time domain of at least one spatial point of the frequency spectrum, said Fourier transform in the time domain having a time central peak and first and second time side peaks; - calculation of the Fourier transform in the frequency domain for one of said first and second time side peaks; - calculation of the spectral amplitude AR(ω) and of the space-spectrum phase φR(χ,γ,ω) for said Fourier transform in the frequency domain.
(FR) Un aspect de l'invention concerne un procédé de caractérisation d'un faisceau de lumière comprenant les étapes suivantes : - séparation au moyen d'une optique séparatrice du faisceau de lumière en un premier sous-faisceau et un deuxième sous-faisceau; - propagation du premier sous-faisceau sur une première optique et du deuxième sous-faisceau sur une deuxième optique, lesdites première et deuxième optiques étant respectivement agencées de sorte que le premier sous-faisceau en sortie de la première optique, dit « faisceau de référence », et le deuxième sous-faisceau en sortie de la deuxième optique, dit « faisceau à caractériser », présentent entre eux un délai temporel τ; - recombinaison au moyen d'une optique recombinatrice du faisceau de référence et du faisceau à caractériser de telle manière qu'ils interfèrent spatialement et forment un motif d'interférence bidimensionnel, le motif d'interférence bidimensionnel s'étendant suivant un premier plan; - mesure au moyen d'un système de mesure du spectre fréquentiel d'au moins une partie du motif d'interférence bidimensionnel; - calcul de la transformée de Fourier dans le domaine temporel d'au moins un point spatial du spectre fréquentiel, ladite transformée de Fourier dans le domaine temporel présentant un pic temporel central et des premier et deuxième pics temporels latéraux; - calcul de la transformée de Fourier dans le domaine fréquentiel pour l'un desdits premier et deuxième pics temporels latéraux; - calcul de l'amplitude spectrale AR(ω) et de la phase spatio-spectrale φR(χ,γ,ω) pour ladite transformée de Fourier dans le domaine fréquentiel.
Related patent documents
CN201580041975.1This application is not viewable in PATENTSCOPE because the national phase entry has not been published yet or the national entry is issued from a country that does not share data with WIPO or there is a formatting issue or an unavailability of the application.
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