公开(公告)号：US10574019B2

公开(公告)日：2020-02-25

申请号：US16007686

申请日：2018-06-13

Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES

Inventor： Fabien Quere

IPC: G02B26/00 ,  G02F1/01 ,  H01S3/00 ,  G02B27/10 ,  G02F1/133 ,  G01J7/00 ,  H05H15/00 ,  G01J11/00

Abstract: A method for controlling the speed of a laser pulse includes a step of applying a chirp to the pulse; and a step of focusing the pulse by means of an optical system having a longitudinal chromatic aberration; whereby an intensity peak of the pulse moves along a propagation axis following, over a finite propagation length, a speed profile dependent on the chirp and on the longitudinal chromatic aberration. The use of such a method for accelerating particles via laser, and a system for implementing such a method, are also provided.

公开(公告)号：US20200025628A1

公开(公告)日：2020-01-23

申请号：US16484605

申请日：2018-02-20

Applicant: UNIVERSIDAD DE SALAMANCA ,  SPHERE ULTRAFAST PHOTONICS, S.L.

Inventor： Iñigo SOLA LARRAÑAGA ,  Benjamin ALONSO FERNÁNDEZ ,  Rosa María ROMERO MUÑIZ

IPC: G01J11/00 ,  H01S3/00

Abstract: An apparatus and a method for in-line measurement of laser pulses with time-dependent polarization are described, which make possible to carry out in-line measurement of laser pulses whose polarization depends on time. For this, one or more polarization projections are selected: the spectrometer detects the projection on the extraordinary propagation axis of a birefringent system to measure the spectrum in that component, also the projection on the ordinary propagation axis, to measure the spectrum in that component, and finally a projection in an intermediate direction that allows to measure the interference spectrum between the two components. The method allows extracting the temporal evolution of the pulse and its polarization state as a function of time, spectral amplitudes and phases of the various polarization projections of the beam.

公开(公告)号：US20190145832A1

公开(公告)日：2019-05-16

申请号：US16227716

申请日：2018-12-20

Applicant: SETI Institute

Inventor： Eliot Gillum ,  Alan Holmes

IPC: G01J11/00 ,  G01J1/42 ,  H04N5/247 ,  G01J3/28

CPC classification number: G01J11/00 ,  G01J1/4228 ,  G01J3/2803 ,  H04N5/247

Abstract: A system and method for detecting laser pulses is disclosed. According to one embodiment, the present system detects an extrasolar laser pulse, ideally repeated pulses, by observing the pulse, characterizing the pulse, and confirming the data related to the pulse.

公开(公告)号：US20190120696A1

公开(公告)日：2019-04-25

申请号：US15792459

申请日：2017-10-24

Applicant: The University of Hong Kong

Inventor： Kenneth Kin Yip WONG ,  Bowen LI

IPC: G01J11/00 ,  G01J9/00

CPC classification number: G01J11/00 ,  G01J9/00 ,  G02B6/2861 ,  H01S3/06754

Abstract: The panoramic-reconstruction temporal imaging (PARTI) system is a single-shot optical waveform measurement apparatus that achieves scalable record length and sub-picosecond resolution simultaneously for ultrafast non-repetitive waveform characterization, in analogy with the wisdom of stitching multiple mosaic images to achieve larger-field-of-view in the spatial domain. It consists of a high-fidelity optical buffer, a low-aberration time magnifier and synchronization-control electronics. For specific measurement circumstances, the PARTI system can also be carried out based on a passive optical buffer, which reduces the system complexity. The PARTI system is configured for real-time single-shot characterization of non-repetitive optical dynamic waveform that evolves over a time scale much larger than that of its ultrafast temporal details, i.e., optical dynamics with large time-bandwidth product.

公开(公告)号：US10209135B2

公开(公告)日：2019-02-19

申请号：US15544188

申请日：2014-10-30

Applicant: Shanghai Jiao Tong University

Inventor： Weiwen Zou ,  Guang Yang ,  Huajie Zhang ,  Jianping Chen

IPC: G01J11/00 ,  G01J3/28 ,  G01R27/28 ,  G01J1/58

Abstract: The present invention relates to a measuring and compensating method for channel mismatch of an ultra-high speed time-wavelength interleaved optical pulse sequence, by employing a generating module of the to-be tested ultra-high speed time-wavelength interleaved optical pulse sequence, an optical spectrum measuring module, an electrical frequency measuring module, and a data analyzing and processing module. The present invention obtains mismatch information of the pulse sequence for each channel by means of measurement and analysis of the ultra-high speed time-wavelength interleaved optical pulse sequence, thus overcoming the bottleneck of inadequate sampling of time-domain observation via an oscilloscope. The channel mismatch information obtained by the present invention may act as a basis for channel mismatch compensation and correction for the ultra-high speed time-wavelength interleaved optical pulse sequence.

公开(公告)号：US20180259629A1

公开(公告)日：2018-09-13

申请号：US15756712

申请日：2016-06-07

Applicant: SONY CORPORATION

Inventor： TOYOHARU OOHATA ,  TAKAHIRO KOYAMA ,  TOMOKI ONO

IPC: G01S7/497 ,  G01C3/06 ,  G01J11/00

CPC classification number: G01S7/497 ,  G01C3/06 ,  G01J11/00 ,  G01J2011/005 ,  G01S7/4861 ,  G01S7/4865 ,  G01S17/10

Abstract: Provided is a correction device including: a photon number counting unit that counts a photon number on the basis of an output signal output from a light receiving unit; a correction value acquiring unit that acquires a correction value corresponding to the photon number; and a correction unit that performs correction based on the correction value.

公开(公告)号：US10033149B2

公开(公告)日：2018-07-24

申请号：US14395570

申请日：2012-04-20

Applicant: Agustin Schiffrin ,  Ralph Ernstorfer ,  Ferenc Krausz ,  Tim Paasch-Colberg

Inventor： Agustin Schiffrin ,  Ralph Ernstorfer ,  Ferenc Krausz ,  Tim Paasch-Colberg

IPC: H01S3/10 ,  H01L31/09 ,  H01L31/0328 ,  G01J11/00 ,  H01L31/0304

Abstract: An opto-electronic device (100) for processing optical and electric pulses includes a photoconductor device (10) with a sensor section (11) which is made of a band gap material and which has electrical sensor contacts (12, 13), and a signal processing device (20) which is connected with the sensor contacts (12, 13), wherein the photoconductor device (10) is adapted to create a photocurrent between the sensor contacts (12, 13) in response to an irradiation with ultra-short driving laser pulses (1) having a photon energy smaller than the energy band gap of the band gap material, having a non-zero electric field component (3) oriented parallel with a line (4) between the electrical sensor contacts (12, 13), and causing a charge carrier displacement in the band gap material, and wherein the signal processing device (20) is configured for an output of an electric signal being characteristic for at least one of carrier-envelope phase (CE phase), intensity, temporal properties, spectral intensity and spectral phase of the driving laser pulses (1). Furthermore, a laser source device including the opto-electronic device and pulse processing method for processing optical and electric pulses are described.

公开(公告)号：US20180052059A1

公开(公告)日：2018-02-22

申请号：US15800329

申请日：2017-11-01

Applicant: Gigaphoton Inc.

Inventor： Masato MORIYA ,  Osamu WAKABAYASHI ,  Yoshinobu WATABE

IPC: G01J11/00 ,  G02B27/14 ,  G02B5/30 ,  G01J4/04 ,  H01S3/00 ,  H01S3/134 ,  G01J1/04

CPC classification number: G01J11/00 ,  G01J1/0414 ,  G01J1/0429 ,  G01J1/0477 ,  G01J1/4257 ,  G01J4/04 ,  G01J2001/4261 ,  G02B5/3066 ,  G02B27/148 ,  H01S3/0014 ,  H01S3/134 ,  H01S3/2366

Abstract: A light beam measurement device includes: a polarization measurement unit including a first measurement beam splitter provided on an optical path of a laser beam and configured to measure a polarization state of the laser beam having been partially reflected by the first measurement beam splitter; a beam profile measurement unit including a second measurement beam splitter provided on the optical path of the laser beam and configured to measure a beam profile of the laser beam having been partially reflected by the second measurement beam splitter; and a laser beam-directional stability measurement unit configured to measure a stability in a traveling direction of the laser beam, while the first measurement beam splitter and the second measurement beam splitter are made of a material containing CaF2.

公开(公告)号：US20180024009A1

公开(公告)日：2018-01-25

申请号：US15544188

申请日：2014-10-30

Applicant: Shanghai Jiao Tong University

Inventor： Weiwen ZOU ,  Guang YANG ,  Huajie ZHANG ,  Jianping CHEN

IPC: G01J11/00 ,  G01J3/28 ,  G01R27/28

CPC classification number: G01J11/00 ,  G01J1/58 ,  G01J3/28 ,  G01R27/28

Abstract: The present invention relates to a measuring and compensating method for channel mismatch of an ultra-high speed time-wavelength interleaved optical pulse sequence, by employing a generating module of the to-be tested ultra-high speed time-wavelength interleaved optical pulse sequence, an optical spectrum measuring module, an electrical frequency measuring module, and a data analyzing and processing module. The present invention obtains mismatch information of the pulse sequence for each channel by means of measurement and analysis of the ultra-high speed time-wavelength interleaved optical pulse sequence, thus overcoming the bottleneck of inadequate sampling of time-domain observation via an oscilloscope. The channel mismatch information obtained by the present invention may act as a basis for channel mismatch compensation and correction for the ultra-high speed time-wavelength interleaved optical pulse sequence.

公开(公告)号：US09766132B2

公开(公告)日：2017-09-19

申请号：US15017730

申请日：2016-02-08

Applicant: SCREEN Holdings Co., Ltd.

Inventor： Yasuhiro Takase ,  Hidetoshi Nakanishi ,  Motohiro Kono ,  Kazuo Kinose

IPC: G01J11/00 ,  G01N33/20 ,  G01R29/08 ,  G01N21/84 ,  G01N21/3586

CPC classification number: G01J11/00 ,  G01N21/3586 ,  G01N21/8422 ,  G01N33/20 ,  G01N2021/8427 ,  G01R29/08

Abstract: A measuring apparatus measure the amount of a metal catalyst supported on a sample that has a membrane of a metal catalyst layer containing the metal catalyst. The measuring apparatus includes a terahertz-wave emitting part that emits a terahertz wave in the range of 0.01 to 10 THz to the sample, a transmitted-terahertz-wave detection part that detects the electric field intensity of a transmitted terahertz wave that has passed through the sample, a storage that stores correlation information acquired in advance and indicating the correlation between the amount of the metal catalyst supported and the electric field intensity of the transmitted terahertz wave, and an amount-of-catalyst-supported acquisition module that acquires the amount of the metal catalyst supported on the sample, on the basis of the correlation information and the electric field intensity of the transmitted terahertz wave detected by the transmitted-terahertz-wave detection part.