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1. US20170205292 - Device and method for characterization of a light beam to determine the spatial-temporal properties of the light beam using a two dimensional interference pattern

Office
United States of America
Application Number 15319204
Application Date 15.06.2015
Publication Number 20170205292
Publication Date 20.07.2017
Grant Number 10151639
Grant Date 11.12.2018
Publication Kind B2
IPC
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 9/02
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 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
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 À L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES
Inventors Fabien Quere
Valentin Gallet
Gustave Pariente
Agents Pillsbury Winthrop Shaw Pittman LLP
Priority Data 1455472 16.06.2014 FR
Title
(EN) Device and method for characterization of a light beam to determine the spatial-temporal properties of the light beam using a two dimensional interference pattern
Abstract
(EN)

A method for characterizing a light beam includes separating the light beam by a separator optic into first and second sub-beams; propagating the first and second sub-beams over first and second optics, respectively, said first and second optics being respectively arranged so that the sub-beams on leaving the optics are separated by a time delay τ; recombining the sub-beams so that they spatially interfere and form a two-dimensional interference pattern; measuring the frequency spectrum of at least part of the interference pattern; calculating the Fourier transform in the time domain of at least one spatial point of the frequency spectrum, the Fourier transform in the time domain having a time central peak and first and second time side peaks; calculating the Fourier transform in the frequency domain for one of the side peaks; calculating the spectral amplitude AR(ω) and the spatial-spectral phase φR(x,y,ω) for the Fourier transform in the frequency domain.


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