Patents by Inventor Christian Jakobsen

Christian Jakobsen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20250237807
    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.
    Type: Application
    Filed: April 10, 2025
    Publication date: July 24, 2025
    Applicant: NKT PHOTONICS A/S
    Inventors: Jens Kristian Lyngsøe, Christian Jakobsen, Mattia Michieletto
  • Publication number: 20250208338
    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 ?, 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.
    Type: Application
    Filed: March 11, 2025
    Publication date: June 26, 2025
    Applicant: NKT PHOTONICS A/S
    Inventors: Jens Kristian LYNGSØ, Christian JAKOBSEN, Jesper Skov GRETLUND, Harald R. SIMONSEN
  • Patent number: 12313877
    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.
    Type: Grant
    Filed: February 28, 2024
    Date of Patent: May 27, 2025
    Assignee: NKT Photonics A/S
    Inventors: Jens Kristian Lyngsøe, Christian Jakobsen, Mattia Michieletto
  • Patent number: 12276829
    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 ?, 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.
    Type: Grant
    Filed: February 14, 2024
    Date of Patent: April 15, 2025
    Assignee: NKT PHOTONICS A/S
    Inventors: Jens Kristian Lyngsø, Christian Jakobsen, Jesper Skov Gretlund, Harald R. Simonsen
  • Publication number: 20250067924
    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.<Th<250° C.
    Type: Application
    Filed: November 13, 2024
    Publication date: February 27, 2025
    Applicant: NKT Photonics A/S
    Inventors: 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
  • Publication number: 20250052946
    Abstract: A supercontinuum source including a pump source and a supercontinuum generator configured for receiving electromagnetic radiation derived from the pump source and for generating supercontinuum radiation, the supercontinuum generator including a nonlinear microstructured optical fibre having a core region comprising silica. The core region includes a dopant selected to reduce light-induced non-bridging oxygen hole centre loss in the nonlinear microstructured optical fibre.
    Type: Application
    Filed: October 4, 2024
    Publication date: February 13, 2025
    Applicant: NKT Photonics A/S
    Inventors: Jens LYNGSØ, Cameron SMITH, Anders HARPØTH, Christian JAKOBSEN, Thomas Tanggard ALKESKJOLD, Irnis KUBAT
  • Publication number: 20240425404
    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.
    Type: Application
    Filed: September 9, 2024
    Publication date: December 26, 2024
    Inventors: Christian Jakobsen, Harald Roager Simonsen, Jens Kristian Lyngsøe, Mattia Michieletto
  • Patent number: 12169303
    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.<Th<250° C.
    Type: Grant
    Filed: June 19, 2023
    Date of Patent: December 17, 2024
    Assignee: NKT PHOTONICS A/S
    Inventors: 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
  • Patent number: 12135453
    Abstract: A supercontinuum source including a pump source and a supercontinuum generator configured for receiving electromagnetic radiation derived from the pump source and for generating supercontinuum radiation, the supercontinuum generator including a nonlinear microstructured optical fibre having a core region comprising silica. The core region includes a dopant selected to reduce light-induced non-bridging oxygen hole centre loss in the nonlinear microstructured optical fibre.
    Type: Grant
    Filed: May 19, 2023
    Date of Patent: November 5, 2024
    Assignee: NKT PHOTONICS A/S
    Inventors: Jens Lyngsø, Cameron Smith, Anders Harpøth, Christian Jakobsen, Thomas Tanggard Alkeskjold, Irnis Kubat
  • Patent number: 12117654
    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.
    Type: Grant
    Filed: October 24, 2023
    Date of Patent: October 15, 2024
    Assignee: NKT Photonics A/S
    Inventors: Thomas Tanggaard Alkeskjold, Jens Kristian Lyngsøe, Christian Jakobsen, Martin Dybendal Maack, Mattia Michieletto, Sidsel Rübner Papior
  • Patent number: 12110248
    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.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: October 8, 2024
    Assignee: NKT Photonics A/S
    Inventors: Christian Jakobsen, Harald Roager Simonsen, Jens Kristian Lyngsøe, Mattia Michieletto
  • Publication number: 20240319436
    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 ?, 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.
    Type: Application
    Filed: February 14, 2024
    Publication date: September 26, 2024
    Applicant: NKT Photonics A/S
    Inventors: Jens Kristian LYNGSØ, Christian JAKOBSEN, Jesper Skov GRETLUND, Harald R. SIMONSEN
  • Patent number: 12098088
    Abstract: A preform element, its production, and fiber production methods from preform assemblies. 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 includes 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.
    Type: Grant
    Filed: June 24, 2021
    Date of Patent: September 24, 2024
    Assignee: NKT Photonics A/S
    Inventors: Harald Roager Simonsen, Christian Jakobsen
  • Publication number: 20240201434
    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.
    Type: Application
    Filed: February 28, 2024
    Publication date: June 20, 2024
    Inventors: Jens Kristian Lyngsøe, Christian Jakobsen, Mattia Michieletto
  • Patent number: 11977255
    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.
    Type: Grant
    Filed: April 17, 2023
    Date of Patent: May 7, 2024
    Assignee: NKT Photonics A/S
    Inventors: Jens Kristian Lyngsøe, Christian Jakobsen, Mattia Michieletto
  • Publication number: 20240111087
    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.<Th<250° C.
    Type: Application
    Filed: June 19, 2023
    Publication date: April 4, 2024
    Applicant: NKT Photonics A/S
    Inventors: 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
  • Patent number: 11947160
    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 ?, 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.
    Type: Grant
    Filed: January 5, 2023
    Date of Patent: April 2, 2024
    Assignee: NKT PHOTONICS A/S
    Inventors: Jens Kristian Lyngsø, Christian Jakobsen, Jesper Skov Gretlund, Harald R. Simonsen
  • Publication number: 20240053545
    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.
    Type: Application
    Filed: October 24, 2023
    Publication date: February 15, 2024
    Inventors: Thomas Tanggaard Alkeskjold, Jens Kristian Lyngsøe, Christian Jakobsen, Martin Dybendal Maack, Mattia Michieletto, Sidsel Rübner Papior
  • Patent number: 11846809
    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.
    Type: Grant
    Filed: May 13, 2022
    Date of Patent: December 19, 2023
    Assignee: NKT PHOTONICS A/S
    Inventors: Thomas Tanggaard Alkeskjold, Jens Kristian Lyngsøe, Christian Jakobsen, Martin Dybendal Maack, Mattia Michieletto, Sidsel Rübner Papior
  • Publication number: 20230305222
    Abstract: A supercontinuum source including a pump source and a supercontinuum generator configured for receiving electromagnetic radiation derived from the pump source and for generating supercontinuum radiation, the supercontinuum generator including a nonlinear microstructured optical fibre having a core region comprising silica. The core region includes a dopant selected to reduce light-induced non-bridging oxygen hole centre loss in the nonlinear microstructured optical fibre.
    Type: Application
    Filed: May 19, 2023
    Publication date: September 28, 2023
    Applicant: NKT Photonics A/S
    Inventors: Jens LYNGSØ, Cameron SMITH, Anders HARPØTH, Christian JAKOBSEN, Thomas Tanggard ALKESKJOLD, Irnis KUBAT