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.

公开(公告)号：US20240041313A1

公开(公告)日：2024-02-08

申请号：US18476520

申请日：2023-09-28

Applicant: NKT PHOTONICS A/S

Inventor： Carsten L. THOMSEN ,  Thomas Vestergaard Andersen ,  Thomas FEUCHTER

IPC: A61B3/00 ,  A61B3/10 ,  G02F1/35 ,  G02F1/365 ,  H01S5/00 ,  H01S5/065

CPC classification number: A61B3/0008 ,  A61B3/102 ,  A61B3/1005 ,  G02F1/35 ,  G02F1/3501 ,  G02F1/365 ,  H01S5/0092 ,  H01S5/0657 ,  G02F1/353 ,  G02F1/3528 ,  G02B27/0927

Abstract: A supercontinuum light source can include a seed laser arranged to provide seed pulses with a pulse frequency Fseed; a pulse frequency multiplier (PFM) arranged to multiply the seed pulses by converting pulses having the pulse frequency Fseed to pump pulses with a pulse frequency Fpump, where Fpump is larger than Fseed; and a non-linear element arranged to receive said pump pulses and convert said pump pulses to pulses of supercontinuum light. The PFM can further include a splitter for splitting pulses into first and second sub beams each having the same pulse frequency, where the PFM is configured such that the sub beams experience different delays; and a combiner for combining said first and second sub beams into a beam having the pulse frequency that is greater than said same pulse frequency. The splitter can have an uneven splitter ratio.

公开(公告)号：US11846809B2

公开(公告)日：2023-12-19

申请号：US17744401

申请日：2022-05-13

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 ,  G02B6/42

CPC classification number: G02B6/3833 ,  G02B6/02328 ,  G02B6/3813 ,  G02B6/02314 ,  G02B6/3874 ,  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.

公开(公告)号：US20230359102A1

公开(公告)日：2023-11-09

申请号：US18344442

申请日：2023-06-29

Applicant: NKT PHOTONICS A/S

Inventor： Cameron Lesley Colwell SMITH ,  Alexandra LUPI ,  Martin Erland Vestergaard PEDERSEN ,  Jens Kristian LYNGSØ ,  Martin D. MAACK

IPC: G02F1/35 ,  G02F1/365

CPC classification number: G02F1/3528 ,  G02F1/3503 ,  G02F1/365 ,  G02F2202/32

Abstract: An optical source (100) comprising a supercontinuum generation apparatus comprising a pump light source (102), a twisted photonic crystal fibre, PCF, (104) and a wideband quarter-wave retarder (106). The pump light source is arranged to provide circularly polarised pump light. The twisted PCF is arranged to receive the pump light and to convert the pump light into circularly polarised supercontinuum light. The wideband quarter-wave retarder is arranged to convert the circularly polarised supercontinuum light into linearly polarised supercontinuum light. The optical source may additionally comprise a wavelength tunable bandpass optical filter arranged to transmit the linearly polarised supercontinuum light at wavelengths within a selected range.

公开(公告)号：US11726385B2

公开(公告)日：2023-08-15

申请号：US17921494

申请日：2021-04-27

Applicant: NKT PHOTONICS A/S

Inventor： Cameron Lesley Colwell Smith ,  Alexandra Lupi ,  Martin Erland Vestergaard Pedersen ,  Jens Kristian Lyngsø ,  Martin D. Maack

IPC: G02F1/35 ,  G02F1/365

CPC classification number: G02F1/3528 ,  G02F1/3503 ,  G02F1/365 ,  G02F2202/32

Abstract: An optical source including a supercontinuum generation apparatus including a pump light source, a twisted photonic crystal fibre, PCF, and a wideband quarter-wave retarder. The pump light source is arranged to provide circularly polarised pump light. The twisted PCF is arranged to receive the pump light and to convert the pump light into circularly polarised supercontinuum light. The wideband quarter-wave retarder is arranged to convert the circularly polarised supercontinuum light into linearly polarised supercontinuum light. The optical source may additionally include a wavelength tunable bandpass optical filter arranged to transmit the linearly polarised supercontinuum light at wavelengths within a selected range.