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    Element for a preform, a fiber production method and an optical fiber drawn from the preform
    17.
    发明授权
    Element for a preform, a fiber production method and an optical fiber drawn from the preform 有权

    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.

    Photonic crystal fiber assembly
    18.
    发明授权
    Photonic crystal fiber assembly 有权

    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.

    Hollow core optical fiber and a laser system
    19.
    发明授权
    Hollow core optical fiber and a laser system 有权

    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.

    AN ELEMENT FOR A PREFORM, A FIBER PRODUCTION METHOD AND AN OPTICAL FIBER DRAWN FROM THE PREFORM
    20.
    发明申请
    AN ELEMENT FOR A PREFORM, A FIBER PRODUCTION METHOD AND AN OPTICAL FIBER DRAWN FROM THE PREFORM 审中-公开

    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.

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