公开(公告)号：US20170199390A1

公开(公告)日：2017-07-13

申请号：US15313028

申请日：2015-05-26

申请人： THALES

发明人： Jérôme BOURDERIONNET ,  Arnaud BRIGNON

IPC分类号： G02B27/10 ,  H01S3/00 ,  H01S3/08 ,  H01S3/23

CPC分类号： G02B27/1086 ,  H01S3/005 ,  H01S3/08009 ,  H01S3/0826 ,  H01S3/10 ,  H01S3/2383

摘要： A system based on recombination by superposition using a diffractive optical element DOE to combine the beams is provided. An optical diffractive assembly is placed upstream of a diffractive optical element to make it possible, via an appropriate imaging system, to optimize the combining efficiency in the ultra-short pulse regime.

公开(公告)号：US20180364106A1

公开(公告)日：2018-12-20

申请号：US15780182

申请日：2016-11-30

申请人： THALES

发明人： Jérome BOURDERIONNET ,  Arnaud BRIGNON ,  Marie ANTIER-MURGEY

IPC分类号： G01J9/02 ,  G01J11/00 ,  G04F13/02 ,  H01S3/00

CPC分类号： G01J9/02 ,  G01J11/00 ,  G04F13/026 ,  H01S3/0057 ,  H01S3/2308

摘要： A method for measuring the delay between N pulses having a duration less than 100 picoseconds comprises the steps: collimated emission of the pulses having the same repetition frequency, emission of a reference pulse having the same repetition frequency capable of producing interference fringes with each of the pulses, for each of the pulses, detection, by a detector, of the coherent sum of this pulse with the reference pulse, this sum producing the interference fringes, the fringes originating from each of the pulses being distinguishable from one another. The reference pulse is emitted with an adjustable delay, and the method further comprises: for each delay, simultaneous measurement for the pulses of N contrasts of the interference fringes, for each of the pulses, a delay value between this pulse and the reference pulse is determined by the delay corresponding to the maximum contrast.

公开(公告)号：US20180356441A1

公开(公告)日：2018-12-13

申请号：US15778607

申请日：2016-11-07

申请人： THALES

发明人： Matthieu DUPONT-NIVET ,  Sylvain SCHWARTZ ,  Arnaud BRIGNON ,  Jérôme BOURDERIONNET

IPC分类号： G01P15/093 ,  G01C19/58 ,  H01S5/0687 ,  H01S5/40 ,  H01S5/50 ,  H01S5/026 ,  H01S5/068 ,  H01S5/02 ,  H01S5/12

CPC分类号： G01P15/093 ,  G01C19/58 ,  G01P15/08 ,  H01S3/0085 ,  H01S3/10084 ,  H01S3/1303 ,  H01S3/1307 ,  H01S5/021 ,  H01S5/026 ,  H01S5/06821 ,  H01S5/0687 ,  H01S5/12 ,  H01S5/4025 ,  H01S5/50

摘要： A laser-source assembly that is configured to illuminate a vacuum chamber containing atoms in the gaseous state so as to implement a cold-atom inertial sensor, the atoms having at least two fundamental levels that are separated by a fundamental frequency difference comprised between 1 and a few gigahertz, the assembly comprises: a master laser that emits a beam having a master frequency; a first control loop that is configured to stabilize the master frequency of the master laser on a frequency corresponding to half a set frequency of an atomic transition between a fundamental level and an excited level of the atoms; a slave laser that has a slave frequency; and a second control loop that is configured to stabilize the slave frequency of the slave laser with respect to the master frequency, the slave frequency being offset with respect to the master frequency successively, over time, by a first preset offset value, a second preset offset value, and a third preset offset value, the offset values being comprised in an interval equal to half the fundamental frequency difference plus or minus a few hundred MHz.

公开(公告)号：US20170299390A1

公开(公告)日：2017-10-19

申请号：US15480129

申请日：2017-04-05

申请人： THALES ,  CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE ,  ECOLE NORMALE SUPERIEURE DE CACHAN

发明人： Sylvain SCHWARTZ ,  Gilles FEUGNET ,  Arnaud BRIGNON ,  Fabien BRETENAKER

IPC分类号： G01C19/72

CPC分类号： G01C19/727

摘要： A passive resonant optical gyroscope comprising a cavity and operating with three frequencies comprises: a first injecting laser to inject a first optical beam into the cavity in a first direction; a second injecting laser to inject a second optical beam into the cavity in an opposite direction; a third injecting laser to inject a third optical beam into the cavity in one of the aforementioned directions, one laser amongst the injecting lasers having a master frequency, the two other injecting lasers, called the first and second slave lasers, respectively having a first slave frequency and a second slave frequency; a master servocontrol device; a first servocontrol stage comprising first and second slave devices; and a second servocontrol stage comprising first and second optical phase-locking devices respectively comprising a first and second slave oscillator to generate a first radiofrequency offset signal and a second radiofrequency offset signal.

公开(公告)号：US20170201063A1

公开(公告)日：2017-07-13

申请号：US15313542

申请日：2015-05-26

申请人： THALES

发明人： Jérôme BOURDERIONNET ,  Arnaud BRIGNON

IPC分类号： H01S3/23 ,  H01S3/10 ,  H01S3/13

CPC分类号： H01S3/1307 ,  G02B6/00 ,  H01S3/08009 ,  H01S3/10053 ,  H01S3/1024 ,  H01S3/1305 ,  H01S3/2308 ,  H01S3/2383

摘要： A system for phasing periodically configured laser sources, which comprises: means for collimating and directing the beams arising from the sources onto a combining diffractive optical element with a periodic phase grating, with an angle of incidence that differs from one beam to the next, these angles of incidence being determined according to the period of the grating; means for controlling the phases of the sources based on a negative feedback signal arising from the combined beams; means for drawing off a fraction of the combined beams; on the path of this fraction of the beams, a Fourier lens, with the combining diffractive optical element in its object plane; a matrix of detectors in the image plane of the Fourier lens, capable of detecting intensity distributions; means for calculating the negative feedback signal based on these intensity distributions.