公开(公告)号：US10527782B2

公开(公告)日：2020-01-07

申请号：US16064751

申请日：2016-12-22

Applicant: NKT Photonics A/S

Inventor： Jens Kristian Lyngsøe ,  Christian Jakobsen ,  Mattia Michieletto

IPC: G02B6/02 ,  G02B6/42

Abstract: A hollow core photonic crystal fiber (PCF) comprising an outer cladding region and 7 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 is disclosed.

公开(公告)号：US10474003B2

公开(公告)日：2019-11-12

申请号：US16256096

申请日：2019-01-24

Applicant: NKT PHOTONICS A/S

Inventor： Carsten L. Thomsen

IPC: G02B6/02 ,  B05D3/02 ,  H01S3/00 ,  G02F1/365 ,  A61B1/06 ,  F21V8/00 ,  H01S3/30 ,  G02F1/35 ,  G02B6/44 ,  G02B6/42

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：US10274672B2

公开(公告)日：2019-04-30

申请号：US15128697

申请日：2015-03-25

Applicant: NKT PHOTONICS A/S

Inventor： Jens Kristian Lyngsøe ,  Christian Jacobsen

IPC: G02B6/036 ,  G02B6/02 ,  G02B21/06 ,  G02B21/00 ,  G02B21/16 ,  G02F1/35

Abstract: A microstructured optical fiber includes a core region and a cladding region which surrounds the core region. The cladding region includes a plurality of cladding features within a cladding background material, wherein the cladding region includes an inner cladding region with at least one inner ring of cladding features and an outer cladding region with at least three outer cladding rings of outer cladding features. The inner cladding features have a first characteristic diameter and the outer cladding region includes a plurality of outer cladding features having a characteristic diameter smaller than the first characteristic diameter. The first characteristic diameter is at least about 10% larger than an average diameter of the outer cladding features and the core region has a diameter of at least about 2 μm.

公开(公告)号：US10254475B2

公开(公告)日：2019-04-09

申请号：US15800711

申请日：2017-11-01

Applicant: NKT PHOTONICS A/S

Inventor： Jeppe Johansen ,  Ole Bang ,  Casper Larsen ,  Thomas Feuchter ,  Carsten L. Thomsen ,  Thomas Vestergaard Andersen

IPC: G02B6/02 ,  G02F1/35 ,  G01B9/02 ,  G02B6/255 ,  G02F1/365 ,  H01S3/067 ,  H01S3/094 ,  H01S3/11

Abstract: The invention relates to a microstructured optical fiber for generating supercontinuum light upon feeding of pump light. The light can be incoherent light. The microstructured optical fiber has a first section and a second section, where the first and second sections have one or more different features. The invention also relates to a supercontinuum source comprising a microstructured optical fiber according to the invention.

公开(公告)号：US20190011634A1

公开(公告)日：2019-01-10

申请号：US16064751

申请日：2016-12-22

Applicant: NKT Photonics A/S

Inventor： Jens Kristian LYNGSØE ,  Christian JAKOBSEN ,  Mattia MICHIELETTO

IPC: G02B6/02 ,  G02B6/42

Abstract: A hollow core photonic crystal fiber (PCF) comprising an outer cladding region and 7 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 is disclosed.

公开(公告)号：US20180339931A1

公开(公告)日：2018-11-29

申请号：US15774780

申请日：2016-11-10

Applicant: NKT Photonics A/S

Inventor： Harald Roager Simonsen ,  Christian Jakobsen

IPC: C03B37/012 ,  C03B37/025 ,  C03B37/027 ,  G02B6/02

Abstract: A preform element, it production and fiber production methods from preform assemblies are disclosed. The preform element has a length and a center axis along its length, a first and second end defined by its length and an outer preform element surface. The preform element comprises a plurality of longitudinal structures disposed to form longitudinal hole(s) in a background material. At least one slot extending from its outer preform element surface and intersecting at least one of the longitudinal holes, wherein the at least one slot does not fully intersect the preform element. The preform element may be a preform center element or a preform ring element and may be assembled to a form part of a preform assembly for an optical fiber.

公开(公告)号：US20180217323A1

公开(公告)日：2018-08-02

申请号：US15128697

申请日：2015-03-25

Applicant: NKT PHOTONICS A/S

Inventor： Jens Kristian LYNGSؘE ,  Christian JACOBSEN

IPC: G02B6/02 ,  G02B21/06

CPC classification number: G02B6/02357 ,  G02B6/02347 ,  G02B21/0004 ,  G02B21/0012 ,  G02B21/06 ,  G02B21/16 ,  G02F2001/3528

Abstract: A microstructured optical fiber includes a core region and a cladding region which surrounds the core region. The cladding region includes a plurality of cladding features within a cladding background material, wherein the cladding region includes an inner cladding region with at least one inner ring of cladding features and an outer cladding region with at least three outer cladding rings of outer cladding features. The inner cladding features have a first characteristic diameter and the outer cladding region includes a plurality of outer cladding features having a characteristic diameter smaller than the first characteristic diameter. The first characteristic diameter is at least about 10% larger than an average diameter of the outer cladding features and the core region has a diameter of at least about 2 μm.

公开(公告)号：US20180188447A1

公开(公告)日：2018-07-05

申请号：US15738623

申请日：2016-06-24

Applicant: NKT PHOTONICS A/S

Inventor： Johannes WEIRICH ,  Martin Dybendal MAACK

IPC: G02B6/02 ,  G02B6/024 ,  G02B6/28 ,  G02B6/293 ,  G02B23/24 ,  G02B21/00 ,  A61B5/00 ,  G01B9/02

CPC classification number: G02B6/02357 ,  A61B5/0066 ,  G01B9/02091 ,  G02B6/02347 ,  G02B6/02361 ,  G02B6/024 ,  G02B6/2821 ,  G02B6/2938 ,  G02B6/29389 ,  G02B21/0032 ,  G02B23/2469 ,  H01S3/2308

Abstract: The invention comprises a delivery fiber assembly suitable for delivering broad band light and comprising a delivery fiber and a connector member. The delivery fiber has a length, an input end for launching light and a delivery end for delivering light. The delivery fiber comprises along its length a core region and a cladding region surrounding the core region wherein the cladding region comprises a cladding background material having a refractive index Nbg and a plurality of microstructures in the form of inclusions of solid material having refractive index up to Ninc and extending in the length of the longitudinal axis of the delivery fiber, wherein Ninc

公开(公告)号：US09971230B2

公开(公告)日：2018-05-15

申请号：US15683281

申请日：2017-08-22

Applicant: NKT PHOTONICS A/S

Inventor： Carsten L. Thomsen

IPC: G02B6/02 ,  B05D3/02 ,  G02F1/365 ,  A61B1/06 ,  H01S3/30 ,  F21V8/00 ,  G02F1/35 ,  G02B6/44 ,  G02B6/42

CPC classification number: G02F1/365 ,  A61B1/06 ,  G02B6/0006 ,  G02B6/02319 ,  G02B6/02333 ,  G02B6/02342 ,  G02B6/4296 ,  G02B6/4492 ,  G02F2001/3528 ,  H01S3/302

Abstract: A method of making a microstructured optical fiber comprising 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：US20170336698A1

公开(公告)日：2017-11-23

申请号：US15513769

申请日：2015-09-03

Applicant: NKT Photonics A/S

Inventor： Jens Kristian LYNGSØE ,  Thomas ALKESKJOLD

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

CPC classification number: G02F1/365 ,  G02B6/02295 ,  G02B6/02338 ,  G02B6/02366 ,  G02F2001/3528

Abstract: A micro-structured optical fiber suitable for supercontinuum generation, a preform therefor, and a method of production thereof and a supercontinuum light source. The optical fiber includes a core microstructured length section Lcm, which includes a micro-structured core region having at least a first region forming a central part of the core region and a second region surrounding the first region; and a cladding surrounding the core region; wherein the first and second regions are of a first and second silica material, respectively, which differs with respect to composition, and wherein the core region in at least a length part of the core microstructured length section Lcm has a cross sectional diameter Dcm perpendicular to the longitudinal axis which is about 8 μm or less.