公开(公告)号：US20210382229A1

公开(公告)日：2021-12-09

申请号：US17406219

申请日：2021-08-19

Applicant: NKT PHOTONICS A/S

Inventor： Jens Kristian Lyngsøe ,  Christian JACOBSEN

IPC: G02B6/02 ,  G02B21/06

Abstract: A microstructured optical fiber having a length and a longitudinal axis along its length, the finer including a core region capable of guiding light along the longitudinal axis and a cladding region which surrounds the core region, the cladding region comprising a cladding background material and a plurality of cladding features within the cladding background material, the cladding features being arranged around the core region, wherein the cladding region comprises an inner cladding region comprising an innermost ring of cladding features and an outer cladding region comprises outer cladding rings of outer cladding features, the innermost ring consisting of those cladding features being closest to the core region, wherein the rings of cladding features each comprise bridges of cladding background material separating adjacent features of the ring, wherein the bridges of the innermost ring have an average minimum width (w1), the minimum width of a bridge of a ring being the shortest distance between two adjacent features of the ring; and wherein at least one outer cladding ring has an average minimum width (w2) of bridges that is larger than the average minimum width (w1) of the bridges of the innermost ring. Also described are a cascade optical fiber with at least one fiber as described, as well as a source of supercontinuum radiation.

公开(公告)号：US20210341682A1

公开(公告)日：2021-11-04

申请号：US17316645

申请日：2021-05-10

Applicant: NKT Photonics A/S

Inventor： Thomas Tanggaard ALKESKJOLD ,  Jens Kristian LYNGSOE ,  Christian JAKOBSEN ,  Martin Dybendal MAACK ,  Mattia MICHIELETTO ,  Sidsel Rubner PAPIOR

IPC: G02B6/38 ,  G02B6/02

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：US11154189B2

公开(公告)日：2021-10-26

申请号：US16581912

申请日：2019-09-25

Applicant: NKT PHOTONICS A/S

Inventor： Carsten L. Thomsen ,  Thomas Vestergaard Andersen ,  Thomas Feuchter

IPC: A61B3/00 ,  G02F1/35 ,  A61B3/10 ,  G02F1/365 ,  H01S5/00 ,  H01S5/065 ,  G02B27/09

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：US20210311251A1

公开(公告)日：2021-10-07

申请号：US17181963

申请日：2021-02-22

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

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：US11137541B2

公开(公告)日：2021-10-05

申请号：US16871297

申请日：2020-05-11

Applicant: NKT PHOTONICS A/S

Inventor： Johannes Weirich ,  Martin Dybendal Maack

IPC: G02B6/02 ,  G02B6/024 ,  A61B5/00 ,  G01B9/02 ,  G02B6/28 ,  G02B6/293 ,  G02B21/00 ,  G02B23/24 ,  H01S3/23

Abstract: The invention comprises a delivery fiber assembly suitable for delivering broad band light. The delivery fiber assembly comprises a delivery fiber and a connector member. The deliver has a length, an input end for launching light and a delivery end for delivering light, where the delivery fiber comprises along its length a core region and a cladding region surrounding the core region. The cladding region comprises a cladding background material having a refractive index Nbg and a plurality 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：US11072554B2

公开(公告)日：2021-07-27

申请号：US15774780

申请日：2016-11-10

Applicant: NKT Photonics A/S

Inventor： Harald Roager Simonsen ,  Christian Jakobsen

IPC: C03B37/012 ,  C03B37/027 ,  C03B37/025 ,  G02B6/032 ,  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：US20210018677A1

公开(公告)日：2021-01-21

申请号：US16913640

申请日：2020-06-26

Applicant: NKT PHOTONICS A/S

Inventor： Jens Kristian Lyngsøe ,  Christian JACOBSEN

IPC: G02B6/02 ,  G02B21/06

Abstract: A microstructured optical fiber including 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 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 core region has a diameter of at least about 2 μm. A cascade optical fiber with at least one fiber as described, as well as a source of optical supercontinuum generation.

公开(公告)号：US10585236B2

公开(公告)日：2020-03-10

申请号：US15942908

申请日：2018-04-02

Applicant: NKT PHOTONICS A/S

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

IPC: G02B6/02 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/00 ,  G02F1/35 ,  G02B6/036 ,  G02F1/365 ,  H01S3/067 ,  G01B9/02 ,  H01S3/11 ,  H01S3/113 ,  H01S3/131 ,  H01S3/16

Abstract: The invention relates to a supercontinuum light source comprising a microstructured optical fiber and a pump light source. The microstructured optical fiber comprises a core and a cladding region surrounding the core, as well as a first fiber length section, a second fiber length section and an intermediate fiber length section between said first and second fiber length sections. The first fiber length section comprises a core with a first characteristic core diameter. The second fiber length section comprises a core with a second characteristic core diameter, smaller than said first characteristic core diameter, where said second characteristic core diameter is substantially constant along said second fiber length section. The intermediate length section of the optical fiber comprises a core which is tapered from said first characteristic core diameter to said second characteristic core diameter over a tapered length.

公开(公告)号：US20200064551A1

公开(公告)日：2020-02-27

申请号：US16609775

申请日：2018-05-02

Applicant: NKT Photonics A/S

Inventor： Thomas FEUCHTER ,  Irnis KUBAT ,  Timur ISKHAKOV

IPC: G02B6/28 ,  G02F1/125

Abstract: A light source assembly having N outputs is disclosed. The assembly comprising: a light source arrangement arranged for supplying light to M inputs, where M an N independently of each other are integers and where M≥2 and M≤N; at least one optical couplers, each having at least one input arm and a plurality of output arms; and an integer number, P, of mode scramblers; The light source arrangement may comprise a broadband light source and a multimode coupler configured for receiving one or more light beams from the light source arrangement, wherein the one or more light beams being derived from the broadband light source and wherein a mode scrambler is arranged for mode scrambling one of said light beams before it enters the multimode coupler.

公开(公告)号：US10551574B2

公开(公告)日：2020-02-04

申请号：US16064872

申请日：2016-12-22

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

Abstract: The invention comprises a photonic crystal fiber (PCF) assembly comprising a PCF and at least one ferrule structure. The PCF has a center axis and comprises a core region and a cladding region and a first fiber end section with a first fiber end. The ferrule structure has a center axis and is mounted to the first fiber end section. The ferrule structure comprises an inner ferrule arrangement and an outer ferrule arrangement surrounding the first fiber end section. The inner ferrule arrangement comprises 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 inner ferrule sections have 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.