公开(公告)号：US20190135679A1

公开(公告)日：2019-05-09

申请号：US16096878

申请日：2017-04-27

Applicant: NKT Photonics A/S

Inventor： Christian JAKOBSEN ,  Harald Roager SIMONSEN ,  Jens Kristian LYNGSØE ,  Mattia MICHIELETTO

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

Abstract: A method of producing a microstructured optical fiber is disclosed. The method includes providing a preform and drawing the preform. The preform has a center axis, a length and a first end and a second end and has at least one longitudinal hole extending lengthwise. The method includes inserting a first end of a pressure tube into the hole of the preform at the first end of the preform and subjecting the hole of the preform to a controlled pressure via the pressure tube during the drawing.

公开(公告)号：US10281797B2

公开(公告)日：2019-05-07

申请号：US15963694

申请日：2018-04-26

Applicant: NKT PHOTONICS A/S

Inventor： Carsten L. Thomsen

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

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：US10228510B2

公开(公告)日：2019-03-12

申请号：US15537005

申请日：2015-12-15

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: G02B6/36 ,  C03C13/04 ,  G02B6/14 ,  G02B6/02 ,  C03C25/60 ,  G02F1/365 ,  G02F1/35 ,  G02B6/036 ,  C03C25/106 ,  C03C25/1065 ,  C03B37/027 ,  C03B37/10 ,  C03C25/607

Abstract: The invention concerns 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 comprises a core extending along the length of said longitudinal axis and a cladding region surrounding the core. At least the cladding region comprises 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 comprises hydrogen and/or deuterium. In at least the degradation resistant length section the PCF further comprises 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：US20190004396A1

公开(公告)日：2019-01-03

申请号：US15963694

申请日：2018-04-26

Applicant: NKT PHOTONICS A/S

Inventor： Carsten L. Thomsen

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

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：US20180360302A1

公开(公告)日：2018-12-20

申请号：US15980177

申请日：2018-05-15

Applicant: NKT PHOTONICS A/S

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

IPC: A61B3/00 ,  G02F1/35

CPC classification number: A61B3/0008 ,  A61B3/1005 ,  A61B3/102 ,  G02B27/0927 ,  G02F1/35 ,  G02F1/3501 ,  G02F1/353 ,  G02F1/365 ,  G02F2001/3503 ,  G02F2001/3528 ,  H01S5/0092 ,  H01S5/0657

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. The disclosure includes other embodiments as well.

公开(公告)号：US20180180802A1

公开(公告)日：2018-06-28

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

CPC classification number: G02B6/02376 ,  G01B9/02091 ,  G02B6/02214 ,  G02B6/02333 ,  G02B6/02347 ,  G02B6/02361 ,  G02B6/255 ,  G02F1/353 ,  G02F1/365 ,  G02F2001/3528 ,  G02F2202/32 ,  H01S3/06725 ,  H01S3/06729 ,  H01S3/094042 ,  H01S3/094076 ,  H01S3/1106

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：US09986904B2

公开(公告)日：2018-06-05

申请号：US15283437

申请日：2016-10-02

Applicant: NKT Photonics A/S

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

IPC: A61B3/00 ,  A61B3/02 ,  A61B3/10 ,  G02F1/35 ,  H01S5/00 ,  H01S5/065 ,  G02F1/365

CPC classification number: A61B3/0008 ,  A61B3/1005 ,  A61B3/102 ,  G02B27/0927 ,  G02F1/35 ,  G02F1/3501 ,  G02F1/353 ,  G02F1/365 ,  G02F2001/3503 ,  G02F2001/3528 ,  H01S5/0092 ,  H01S5/0657

Abstract: A supercontinuum light source can comprise 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 comprise 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. The disclosure includes other embodiments as well.

公开(公告)号：US09835795B2

公开(公告)日：2017-12-05

申请号：US14903772

申请日：2014-07-07

Applicant: NKT PHOTONICS A/S

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

IPC: G02B6/02 ,  H01S3/094 ,  H01S3/00 ,  G02F1/35 ,  G02B6/036 ,  G02F1/365 ,  H01S3/067 ,  G01B9/02 ,  H01S3/11 ,  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 ,  G02F2001/3528 ,  G02F2202/32 ,  H01S3/0092 ,  H01S3/06725 ,  H01S3/06741 ,  H01S3/06745 ,  H01S3/094076 ,  H01S3/09415 ,  H01S3/11 ,  H01S3/113 ,  H01S3/1312 ,  H01S3/1611

Abstract: The invention relates to a microstructured optical fiber for generating supercontinuum light. The optical fiber comprises a core and a cladding region surrounding the core. The optical fiber comprises 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 comprises a core which is tapered from said first characteristic core diameter to said second characteristic core diameter over a tapered length. The invention also relates to a supercontinuum light source comprising an optical fiber according to the invention and a pump light source.

公开(公告)号：US20170250518A1

公开(公告)日：2017-08-31

申请号：US15431111

申请日：2017-02-13

Applicant: NKT Photonics A/S

Inventor： John Redvers Clowes ,  Anatoly Borisovich Grudinin ,  Ian Michael Godfrey

IPC: H01S3/13

CPC classification number: H01S3/11 ,  G01N21/6458 ,  G01N2021/6419 ,  G01N2021/6441 ,  G01N2201/0697 ,  G02B21/16 ,  G02F1/353 ,  G02F1/365 ,  G02F2001/3528 ,  H01S3/10 ,  H01S3/10046 ,  H01S3/1024 ,  H01S3/108 ,  H01S3/2308

Abstract: A method of providing optical supercontinuum pulses can comprise generating optical pump pulses with an optical pump laser, the optical pump pulses having a pump pulse repetition rate; launching optical pump pulses into a nonlinear optical element comprising an optical fiber; generating optical supercontinuum pulses from the optical pump pules via spectral broadening within the optical fiber; selectively providing a plurality of different repetition rates for the optical pump pulses so as to generate optical supercontinuum pulses having different repetition rates; and providing nominally identical spectral broadening of the optical supercontinuum pules having the different repetition rates.

公开(公告)号：US12276829B2

公开(公告)日：2025-04-15

申请号：US18441046

申请日：2024-02-14

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

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.