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：USRE50238E1

公开(公告)日：2024-12-17

申请号：US17574175

申请日：2022-01-12

Applicant: NKT PHOTONICS A/S

Inventor： Carsten L. Thomsen ,  Thomas Vestergaard Andersen

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

Abstract: A supercontinuum light source includes a microstructured optical fiber, and a feeding unit arranged for feeding pump pulses to the microstructured optical fiber, wherein the feeding unit comprises a picosecond laser and one or more amplifiers, wherein the microstructured optical fiber is a silica fiber wherein at least a part of the core being of silica or doped silica, and including a core including core material and a cladding surrounding the core, and at least the core material is loaded with deuterium to have an OD absorption peak around 1870 nm, wherein the feeding unit is spliced to the microstructured optical fiber.

公开(公告)号：US20240272515A1

公开(公告)日：2024-08-15

申请号：US18631570

申请日：2024-04-10

Applicant: NKT Photonics A/S

Inventor： Carsten L. THOMSEN

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

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：US20240219295A1

公开(公告)日：2024-07-04

申请号：US18555438

申请日：2022-04-11

Applicant: NKT Photonics A/S

Inventor： Peter Moselund ,  Rasmus Engelsholm ,  Erik Nicolai Christensen

IPC: G01N21/17 ,  G02F1/365

CPC classification number: G01N21/1702 ,  G02F1/365 ,  G01N2021/1706 ,  G01N2201/06113 ,  G01N2201/088

Abstract: Disclosed is an optical system for monitoring a parameter, such as a density or a pressure, of a fluid, in particular a gas or a mixture of gases, in a hollow core of an optical fiber, wherein the optical system comprises: an optical fiber which comprises a hollow core that is filled with a fluid, a pulsed laser for providing pulsed laser light, which is input into a first end of the optical fiber such that the laser light propagates through the hollow core from the first end to a second end of the fiber, wherein the pulsed laser light is configured to induce nonlinear processes by interacting with the fluid in the hollow core, and wherein the optical system further comprises a monitoring device for detecting acoustic vibrations in the fiber and for determining a parameter of the fluid based on the acoustic vibrations.