公开(公告)号：US12126133B2

公开(公告)日：2024-10-22

申请号：US17904729

申请日：2021-03-09

Applicant: KOREA INSTITUTE OF MACHINERY & MATERIALS

Inventor： Kwangyun Jung ,  Sang Hoon Ahn ,  Jiyeon Choi ,  Dohyun Kim ,  Ji-Whan Noh ,  Hee-shin Kang

IPC: H01S3/00 ,  B23K26/0622 ,  G02F1/365 ,  H01S3/067

CPC classification number: H01S3/0085 ,  B23K26/0622 ,  G02F1/365 ,  H01S3/0057 ,  H01S3/0092 ,  H01S3/06754 ,  H01S2301/02

Abstract: A femtosecond laser source according to an embodiment of the present invention includes: a pulse generator that converts a continuous wave laser into an optical pulse train; a burst generator that separates the optical pulse train into a plurality of burst pulses; a pulse amplification and spectral broadening unit that expands the spectrum by amplifying a plurality of burst pulses; and a pulse compressor that compresses a plurality of amplified burst pulses to generate a femtosecond laser with a pulse width of 1 picosecond (10−12 s) or less.

公开(公告)号：US12075550B2

公开(公告)日：2024-08-27

申请号：US18229582

申请日：2023-08-02

Applicant: Logos Technologies HoldCo, Inc.

Inventor： E. Michael Campbell ,  David Eimerl ,  William F. Krupke

IPC: H01S3/10 ,  G21B1/03 ,  G21B1/23 ,  H05H1/22 ,  H01S3/00 ,  H01S3/23

CPC classification number: H05H1/22 ,  G21B1/03 ,  G21B1/23 ,  H01S3/0057 ,  H01S3/10038 ,  H01S3/2391

Abstract: Embodiments of a laser system having an extremely large number of small pulsed lasers for irradiating small targets in inertial confinement fusion experiments, high energy density physics experiments, and inertial fusion power plants is more flexible than existing laser systems. Embodiments facilitate finer control of critical features of laser pulses for inertial fusion, as well as significant reduction in development costs and expansion of the community involved in the research relative to existing laser systems. Embodiments produce smooth intensity profiles at the target, large bandwidth that is over two orders of magnitude greater than existing laser systems, and fine control over laser wavelengths, focal properties, temporal pulse shape, and illumination geometry. Properties of each of the small pulsed lasers are individually selectable.

公开(公告)号：US20240244738A1

公开(公告)日：2024-07-18

申请号：US18564153

申请日：2022-06-01

Applicant: Oxford University Innovation Limited

Inventor： Roman WALCZAK ,  Oscar JAKOBSSON ,  Simon HOOKER

IPC: H05H15/00 ,  H01S3/00 ,  H01S3/23

CPC classification number: H05H15/00 ,  H01S3/0057 ,  H01S3/2383

Abstract: A driver (1) for a plasma particle accelerator includes a plasma (10) and laser system(s) (2) that generate first and second pulses. The first pulse (4) has a duration less than the electron plasma period. The second pulse (6) is temporally smooth and has a duration greater than the electron plasma period and less than the ion plasma period. The first pulse generates a plasma wake and the second pulse interacts with the wake to form red and blue-shifted sidebands. The driver also includes a dispersive optical device (20) that introduces a chromatic dispersion to shift the spectral phases of the red and blue-shifted sidebands, to temporally shift them relative to each other, so as to form coincident pulses (22) for generating a plasma wake in a plasma particle accelerator (26).

公开(公告)号：US12040585B2

公开(公告)日：2024-07-16

申请号：US17181472

申请日：2021-02-22

Applicant: University of Southampton

Inventor： Masaaki Sakakura ,  Yanhao Yu ,  Peter Kazansky ,  Lei Wang

IPC: G11B7/0037 ,  B23K26/0622 ,  B23K26/08 ,  B23K26/082 ,  G01N21/95 ,  G02B5/30 ,  G02B26/08 ,  G02B27/09 ,  G02F1/33 ,  G11B7/127 ,  H01S3/00 ,  B82Y10/00

CPC classification number: H01S3/0057 ,  B23K26/0624 ,  B23K26/08 ,  B23K26/082 ,  B23K26/083 ,  G02B5/3083 ,  G02B26/0808 ,  G02B27/0944 ,  G02F1/33 ,  B82Y10/00

Abstract: A method of delivering optical pulses to a substrate comprises directing a focused beam from a source of optical pulses along a propagation direction onto a substrate; moving the substrate relative to the beam in a plane substantially orthogonal to the propagation direction and continuously along a first direction that includes spaced apart row locations on the substrate, and delivering a plurality of optical pulses from source as the beam reaches each row location; and between delivering the optical pulses at consecutive row locations, moving the beam relative to the substrate in one or more successive discrete movements along a second direction in the plane orthogonal to the first direction, to direct the beam to one or more spaced apart column locations on the substrate, and delivering a plurality of optical pulses from the source at each column location.

公开(公告)号：US20240235143A1

公开(公告)日：2024-07-11

申请号：US18150723

申请日：2023-01-05

Applicant: TIPD, LLC ,  ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA

Inventor： Yushi Kaneda ,  Lloyd J. LaComb, JR. ,  Khanh Kieu

IPC: H01S3/00 ,  G02F1/35 ,  G02F1/355 ,  H01S3/067

CPC classification number: H01S3/0092 ,  G02F1/3534 ,  G02F1/354 ,  G02F1/3544 ,  G02F1/3551 ,  H01S3/0057 ,  H01S3/067

Abstract: Laser sources of the present invention allow for the efficient generation of harmonic frequencies from broadband sources. Over-compression and under-compression of a split signal result in two beams chirped in opposite directions. These two beams may be combined in a non-linear crystal to generate a narrow-band harmonic signal from a broadband source.

公开(公告)号：US11984695B1

公开(公告)日：2024-05-14

申请号：US18132070

申请日：2023-04-07

Applicant: Khanh Le ,  John Lekavich ,  Bao Tran

Inventor： Khanh Le ,  John Lekavich ,  Bao Tran

IPC: H01S3/00 ,  H01S3/1123 ,  H01S3/115 ,  H01S3/117

CPC classification number: H01S3/117 ,  H01S3/0057 ,  H01S3/0085 ,  H01S3/1123 ,  H01S3/115

Abstract: An optical system for producing pulsed laser output includes a laser cavity containing an active medium for generating laser radiation; and an acousto-optic modulator (AOM) positioned in the laser cavity for modulating the laser radiation acting as a Q-switch.

公开(公告)号：US11955762B2

公开(公告)日：2024-04-09

申请号：US18026133

申请日：2021-09-08

Applicant: FEMTOSECOND RESEARCH CENTER CO., LTD.

Inventor： Bingwei Xu ,  Xin Zhu

IPC: H01S3/00 ,  G02F1/365 ,  H01S3/067 ,  H01S3/094

CPC classification number: H01S3/0057 ,  G02F1/365 ,  H01S3/06754 ,  H01S3/094003 ,  H01S3/094076

Abstract: A laser pulse energy amplification device and method, and a femtosecond laser are provided. The laser pulse energy amplification device includes a pulse amplifier and a pulse shaper that are connected in sequence. The pulse amplifier is connected to an output port of a seed laser source and is connected to the pulse shaper that outputs a femtosecond laser pulse. The seed laser source is configured to generate and input a seed laser pulse to the pulse amplifier. The pulse amplifier is configured to introduce a nonlinear phase shift into the seed laser pulse, perform energy amplification and spectral stretching, and output an energy-amplified laser pulse with a nonlinear phase to the pulse shaper. The pulse shaper is configured to measure a shape and/or the nonlinear phase of the energy-amplified laser pulse, and shape the energy-amplified laser pulse according to the shape and/or the nonlinear phase.

公开(公告)号：US20240106184A1

公开(公告)日：2024-03-28

申请号：US18527819

申请日：2023-12-04

Applicant: Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. ,  Ludwig-Maximilians-Universität München

Inventor： Ka Fai Mak ,  Ferenc Krausz ,  Philipp Steinleitner ,  Nathalie Lenke

IPC: H01S3/0941 ,  H01S3/00 ,  H01S3/08 ,  H01S5/14

CPC classification number: H01S3/09415 ,  H01S3/0057 ,  H01S3/08059 ,  H01S5/142

Abstract: A laser oscillator system includes a resonator cavity for confining an intra-cavity laser beam. The laser oscillator system further includes a Cr-doped II-VI gain medium arranged within the resonator cavity and an imaging unit forming part of the resonator cavity. The imaging unit is configured to decouple a spot size of the intra-cavity laser beam at the gain medium from an intra-cavity length of the resonator cavity. Moreover, the resonator cavity and the imaging unit are configured such that the laser oscillator system emits laser pulses at a repetition rate of 50 MHz or less. Further, a laser system and methods for generating light pulses having spectral components at a wavelength of at least 2 μm are disclosed.

公开(公告)号：US11909164B2

公开(公告)日：2024-02-20

申请号：US17054849

申请日：2019-04-19

Applicant: National University Corporation Tokyo University of Agriculture & Technology

Inventor： Kazuhiko Misawa ,  Terumasa Ito

IPC: H01S3/00 ,  G02B21/06 ,  G01N21/65 ,  G02B27/10 ,  H01S3/30

CPC classification number: H01S3/0057 ,  G01N21/65 ,  G02B21/06 ,  G02B27/1006 ,  H01S3/0078 ,  H01S3/30

Abstract: An optical pulse pair generator is configured to generate an optical pulse pair including a first pulse beam and a second pulse beam having respective central wavelengths that are separated by a predetermined wavelength difference from each other and having target time waveforms that are substantially the same as each other. The optical pulse pair generator provided includes a splitter section configured to split an incident pulse beam into two, a first shaping section configured to shape one of the pulse beams split by the splitter section by shaping into the target time waveform and setting a central frequency so as to configure the first pulse beam, and a second shaping section configured to shape the other of the pulse beams split by the splitter section by shaping into the target time waveform so as to configure the second pulse beam.

公开(公告)号：US11757244B2

公开(公告)日：2023-09-12

申请号：US16900182

申请日：2020-06-12

Applicant: Thorlabs, Inc.

Inventor： Scott R. Domingue ,  Matthew S. Kirchner ,  Laura Wooldridge

IPC: H01S3/00 ,  H01S3/10

CPC classification number: H01S3/0057 ,  H01S3/0078 ,  H01S3/1003

Abstract: A method of pulse shaping using spectral filtering, positive chirp, and self-phase modulation to control the accumulated higher-order phase terms of the spectral phase. This pulse shaping method has particular advantage in fiber chirped pulse amplification (FCPA) systems, where there are two effects: (1) an offsetting of the fourth order phase via nonlinear phase accumulation, allowing for a higher Strehl ratio (i.e., a cleaner pulse), higher peak power pulse and (2) enabling power scaling to higher pulse energies without the increased nonlinear phase accumulation leading to pulse breakup. This technique can be used both in a passive system with no amplification to clean up an existing pulse, and in an amplifier system to enable higher performance operation (shorter pulses, cleaner pulses, higher energy pulses).