公开(公告)号：US12085835B2

公开(公告)日：2024-09-10

申请号：US17786904

申请日：2020-12-21

Applicant: NKT PHOTONICS A/S

Inventor： Thomas Vestergaard Andersen

IPC: G02F1/365 ,  G01J3/10 ,  H01S3/00 ,  H01S3/10 ,  H01S3/13

CPC classification number: G02F1/365 ,  G01J3/10 ,  H01S3/0092 ,  H01S3/10046 ,  H01S3/1301

Abstract: A light source including: a pulse generator for providing a first sequence of light pulses, the first sequence of light pulses including a first number of light pulses within a predetermined time period, a manipulator configured to generate a second sequence of light pulses from the first sequence of light pulses, the second sequence of light pulses having a second number of light pulses within the predetermined time period, the second number being different from the first number, and a nonlinear optical element arranged to receive the second sequence of light pulses.

公开(公告)号：US20240264362A1

公开(公告)日：2024-08-08

申请号：US18641121

申请日：2024-04-19

Applicant: NKT Photonics A/S

Inventor： Peter Morten Moselund

IPC: G02B6/02 ,  G02F1/35 ,  G02F1/365

CPC classification number: G02B6/02214 ,  G02F1/3513 ,  G02F1/353 ,  G02F1/365 ,  G02F1/3528

Abstract: A supercontinuum source including a pump light source arranged to emit pump light and a nonlinear fiber having a core arranged to receive the pump light. The supercontinuum includes infrared wavelengths generated in the nonlinear fiber from the pump light. The nonlinear fiber has a dispersion profile including a zero dispersion wavelength, a positive peak value at a peak wavelength longer than the zero dispersion wavelength, a minimum value of dispersion at a minimum wavelength longer than the peak wavelength. The pump light is arranged to include substantial energy at one or more preferred pump wavelengths which are 10 nm longer than the zero dispersion wavelength or more. Also, a supercontinuum pump source including a nonlinear fiber having a core including a fluoride glass and having a core diameter smaller than 7 μm, where the fiber has a numerical aperture of more than 0.26.

公开(公告)号：US12038668B2

公开(公告)日：2024-07-16

申请号：US17786775

申请日：2020-12-21

Applicant: NKT PHOTONICS A/S

Inventor： Thomas Vestergaard Andersen

IPC: G02F1/35 ,  G02F1/365 ,  H01S3/00

CPC classification number: G02F1/3528 ,  G02F1/365 ,  H01S3/0085 ,  H01S3/0092 ,  G02F2201/20 ,  G02F2201/205

Abstract: A light source, including: a pulse generator for providing an initial sequence of light pulses, the pulse generator including an optical source for producing optical pulses; and a modulator in communication with the optical source for increasing or decreasing the selected number of pulses provided by the pulse generator in the selected time period; first and second optical arms, for propagating, respectively, first and second sequences of light pulses, wherein the first optical arm includes a first manipulator configured to generate the first sequence of light pulses from the initial sequence of light pulses, wherein the light source includes a nonlinear optical element arranged to receive the first sequence of light pulses or the second sequence of light pulses, and an optical switch arranged to switch either the first sequence of light pulses or the second sequence of light pulses for reception by the nonlinear optical element.

公开(公告)号：US20240230985A1

公开(公告)日：2024-07-11

申请号：US18613826

申请日：2024-03-22

Applicant: NKT Photonics A/S

Inventor： Carsten L. Thomsen ,  Thomas T. Alkeskjold ,  Erik B. Thomsen

IPC: G02B6/02 ,  G01B9/02001 ,  G01B9/02091 ,  G02B6/036 ,  G02F1/35 ,  G02F1/365 ,  H01S3/00 ,  H01S3/067 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/113 ,  H01S3/131 ,  H01S3/16

CPC classification number: G02B6/02376 ,  G01B9/02007 ,  G01B9/02091 ,  G02B6/02214 ,  G02B6/02333 ,  G02B6/02338 ,  G02B6/02347 ,  G02B6/03633 ,  G02F1/353 ,  G02F1/365 ,  H01S3/0092 ,  H01S3/06725 ,  H01S3/06741 ,  H01S3/06745 ,  H01S3/094076 ,  H01S3/09415 ,  G02F1/3528 ,  G02F2202/32 ,  H01S3/113 ,  H01S3/1312 ,  H01S3/1611

Abstract: A microstructured optical fiber for generating supercontinuum light. The optical fiber includes a core and a cladding region surrounding the core. The optical fiber includes a first fiber length section, a second fiber length section as well as an intermediate fiber length section between said first and second fiber length sections. The first fiber length section has a core with a first characteristic core diameter larger than about 7 μm. The second fiber length section has a core with a second characteristic core diameter, smaller than said first characteristic core diameter. The intermediate length section of the optical fiber includes a core which is tapered from said first characteristic core diameter to the second characteristic core diameter over a tapered length. Also, a supercontinuum light source including an optical fiber and a pump light source.

公开(公告)号：US20240201434A1

公开(公告)日：2024-06-20

申请号：US18590369

申请日：2024-02-28

Applicant: NKT Photonics A/S

Inventor： Jens Kristian Lyngsøe ,  Christian Jakobsen ,  Mattia Michieletto

IPC: G02B6/02 ,  G02B6/42

CPC classification number: G02B6/02328 ,  G02B6/02338 ,  G02B6/02366 ,  G02B6/02371 ,  G02B6/4206 ,  G02B6/4296

Abstract: A hollow core photonic crystal fiber (PCF) including an outer cladding region and seven hollow tubes surrounded by the outer cladding region. Each of the hollow tubes is fused to the outer cladding to form a ring defining an inner cladding region and a hollow core region surrounded by the inner cladding region. The hollow tubes are not touching each other but are arranged with distance to adjacent hollow tubes. The hollow tubes each have an average outer diameter d2 and an average inner diameter d1, wherein d1/d2 is equal to or larger than about 0.8, such as equal to or larger than about 0.85, such as equal to or larger than about 0.9. Also, a laser system.

公开(公告)号：US11994688B2

公开(公告)日：2024-05-28

申请号：US18339860

申请日：2023-06-22

Applicant: NKT PHOTONICS A/S

Inventor： Dmitri Oulianov ,  Frederik Nielsen ,  Irnis Kubat ,  Thomas Feuchter ,  Timur Iskhakov

IPC: G02B27/28 ,  G02B27/09 ,  G02F1/1335 ,  G02F1/13357

CPC classification number: G02B27/286 ,  G02B27/0961 ,  G02B27/283 ,  G02F1/133526 ,  G02F1/13362

Abstract: A depolarizing homogenizer including one or more lenslet arrays, for providing a plurality of beamlets associated with different respective parts of a received beam. The depolarizing homogenizer includes a depolarizer comprising different areas which affect polarization differently, the depolarizer being positioned to cause alteration of the polarization characteristics of at least some of the plurality of beamlets. A lens is arranged to at least partially overlap the beamlets having the altered polarization characteristics.

公开(公告)号：US11988940B2

公开(公告)日：2024-05-21

申请号：US17856048

申请日：2022-07-01

Applicant: NKT Photonics A/S

Inventor： Carsten L. Thomsen

IPC: G02F1/365 ,  A61B1/06 ,  F21V8/00 ,  G02B6/02 ,  H01S3/30 ,  G02B6/42 ,  G02B6/44 ,  G02F1/35

CPC classification number: G02F1/365 ,  A61B1/06 ,  G02B6/0006 ,  G02B6/02319 ,  G02B6/02342 ,  H01S3/302 ,  G02B6/02333 ,  G02B6/4296 ,  G02B6/44382 ,  G02F1/3528

Abstract: A method of making a microstructured optical fiber including loading the core and cladding materials of the fiber with hydrogen and deuterium at a loading temperature; annealing the fiber at a selected temperature Tanneal; pumping the fiber with radiation; and reducing the temperature of the fiber and storing the fiber at the reduced temperature before the step of pumping the fiber; and wherein the method allows the hydrogen and the deuterium to become bound to the core material and the cladding material.

公开(公告)号：US20240111087A1

公开(公告)日：2024-04-04

申请号：US18337144

申请日：2023-06-19

Applicant: NKT Photonics A/S

Inventor： Thomas Tanggaard ALKESKJOLD ,  Casper Laur BYG ,  Christian Jakobsen ,  Jens Kristian LYNGSØE ,  Kim G. JESPERSEN ,  Jeppe JOHANSEN ,  Martin Dybendal MAACK ,  Martin Erland Vestergaard PEDERSEN ,  Carsten L. THOMSEN

IPC: G02B6/036 ,  C03B37/027 ,  C03B37/10 ,  C03C13/04 ,  C03C25/106 ,  C03C25/1065 ,  C03C25/607 ,  G02B6/02 ,  G02B6/14 ,  G02F1/365

CPC classification number: G02B6/03694 ,  C03B37/02781 ,  C03B37/0279 ,  C03B37/10 ,  C03C13/045 ,  C03C13/046 ,  C03C25/1061 ,  C03C25/1062 ,  C03C25/1068 ,  C03C25/607 ,  G02B6/02347 ,  G02B6/02357 ,  G02B6/02361 ,  G02B6/02395 ,  G02B6/14 ,  G02F1/365 ,  C03B2201/02 ,  C03B2201/12 ,  C03B2201/21 ,  C03B2201/22 ,  C03B2203/14 ,  C03B2203/23 ,  C03B2203/42 ,  C03C2201/21 ,  C03C2201/22 ,  G02B6/02366 ,  G02F1/3528

Abstract: A Photonic Crystal Fiber (PCF) a method of its production and a supercontinuum light source comprising such PCF. The PCF has a longitudinal axis and includes a core extending along the length of said longitudinal axis and a cladding region surrounding the core. At least the cladding region includes a plurality of microstructures in the form of inclusions extending along the longitudinal axis of the PCF in at least a microstructured length section. In at least a degradation resistant length section of the microstructured length section the PCF includes hydrogen and/or deuterium. In at least the degradation resistant length section the PCF further includes a main coating surrounding the cladding region, which main coating is hermetic for the hydrogen and/or deuterium at a temperature below Th, wherein Th is at least about 50° C., preferably 50° C.

公开(公告)号：US11947160B2

公开(公告)日：2024-04-02

申请号：US18150486

申请日：2023-01-05

Applicant: NKT Photonics A/S

Inventor： Jens Kristian Lyngsø ,  Christian Jakobsen ,  Jesper Skov Gretlund ,  Harald R. Simonsen

IPC: G02B6/02 ,  C03B37/012 ,  C03C13/04 ,  C03C25/66

CPC classification number: G02B6/02342 ,  C03B37/0122 ,  C03C13/045 ,  C03C25/66 ,  C03B2201/03 ,  C03B2201/20 ,  C03B2201/21 ,  C03B2203/14 ,  C03B2203/16 ,  C03B2203/42 ,  G02B6/02352 ,  G02B6/02357

Abstract: An optical fiber having an axial direction and a cross section perpendicular to the axial direction, and a method and preform for producing such an optical fiber. The optical fiber is adapted to guide light at a wavelength λ, and includes a core region, an inner cladding region surrounding said core region, and at least one of a first type of feature including a void and a surrounding first silica material. The core, the inner cladding region and the first type of feature extends along said axial direction over at least a part of the length of the optical fiber. The first silica material has a first chlorine concentration of about 300 ppm or less.

公开(公告)号：US20240053545A1

公开(公告)日：2024-02-15

申请号：US18493548

申请日：2023-10-24

Applicant: NKT Photonics A/S

Inventor： Thomas Tanggaard Alkeskjold ,  Jens Kristian Lyngsøe ,  Christian Jakobsen ,  Martin Dybendal Maack ,  Mattia Michieletto ,  Sidsel Rübner Papior

IPC: G02B6/38 ,  G02B6/02

CPC classification number: G02B6/3833 ,  G02B6/02328 ,  G02B6/3813 ,  G02B6/02314 ,  G02B6/4296

Abstract: A photonic crystal fiber (PCF) assembly including a PCF and at least one ferrule structure. The PCF includes a core region and a cladding region and a first fiber end section with a first fiber end. The ferrule structure is mounted to the first fiber end section. The ferrule structure includes an inner ferrule arrangement and an outer ferrule arrangement surrounding the first fiber end section. The inner ferrule arrangement includes an inner ferrule front section proximally to the first fiber end and an inner ferrule rear section distally to the first fiber end, and each of the sections has an inner diameter and in at least a length thereof fully surrounds the PCF. The inner ferrule rear section is anchored in an anchor length section to the first fiber end section and the inner ferrule front section supports the first fiber end section proximally to the first fiber end.