公开(公告)号：US20200278491A1

公开(公告)日：2020-09-03

申请号：US16647118

申请日：2018-09-11

Applicant: University of Southampton

Inventor： Francesco POLETTI ,  Gregory Teofil JASION ,  Natalie WHEELER ,  Thomas David BRADLEY ,  Mubassira B Syed NAWAZUDDIN ,  John HAYES

IPC: G02B6/02 ,  G02B6/024 ,  C03B37/012

Abstract: A preform (10) for an antiresonant hollow core optical fibre comprises an outer jacket tube (12) having an inner surface and a central longitudinal axis (24); a plurality of antiresonant cladding tubes (14) spaced apart at predefined peripheral locations around the inner surface of the outer jacket tube (12), each antiresonant cladding tube (14) in contact with the inner surface such that a central longitudinal axis (26) of each antiresonant cladding tube (14) is at a first radial distance from the central longitudinal axis (24) of the outer jacket tube (12); and a plurality of spacing elements (22) disposed alternately with the antiresonant cladding tubes (14) and each in contact with an outer surface of each of two adjacent antiresonant cladding tubes (14) at one or more contact points (28), the contact points (28) at a second radial distance from the central longitudinal axis (24) of the outer jacket tube (12), the second radial distance being greater than the first radial distance.

公开(公告)号：US20210088717A1

公开(公告)日：2021-03-25

申请号：US16635200

申请日：2018-08-01

Applicant: University of Southampton

Inventor： Gregory Teofil JASION ,  Francesco POLETTI ,  Yong CHEN ,  Eric Rodrigue Numakm FOKOUA ,  Thomas David BRADLEY

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

Abstract: A hollow core photonic bandgap optical fibre comprises: a cladding comprising capillaries in a hexagonal array and a hollow core formed by excluding a hexagonal group of nineteen capillaries from the centre of the hexagonal array. The core is inflated. A core size ratio is 1.26 or above, defined as a ratio of the core diameter to the cladding diameter normalized to the ratio of the core diameter to the cladding diameter in an undistorted hexagonal array; a first ring ratio is between 0.55 and 2.50, defined as a ratio of the length of radially aligned struts separating the capillaries of the first ring to the length of a strut in an undistorted hexagonal array; and a core node spacing is between 0.60 and 1.90, where defined as a ratio of a strut length around the core of a largest corner capillary and a strut length around the core of a smallest side capillary. The fabrication method comprises four different pressures for the core, corner capillary, side capillary and cladding.

公开(公告)号：US20220196907A1

公开(公告)日：2022-06-23

申请号：US17441886

申请日：2020-04-22

Applicant: University of Southampton

Inventor： Francesco POLETTI

IPC: G02B6/02 ,  C03B37/012 ,  C03B23/07 ,  C03B37/027 ,  B29D11/00

Abstract: A shaped tube (50,51) for use as a component in the fabrication of an antiresonant hollow core optical fibre, the shaped tube having a side wall with a transverse cross-sectional shape comprising a number of major curved portions (52) alternating with the same number of minor substantially straight portions (54), each curved portion (52) having an inwardly curving shape, and each straight portion (54) being equidistant from a central longitudinal axis of the shaped tube (50,51).

公开(公告)号：US20230384511A1

公开(公告)日：2023-11-30

申请号：US18245273

申请日：2021-09-02

Applicant: University of Southampton

Inventor： Natalie WHEELER ,  Peter HORAK ,  Francesco POLETTI ,  Thomas KELLY ,  Matthew PARTRIDGE

IPC: G02B6/02

CPC classification number: G02B6/02328 ,  G02B6/02347

Abstract: A hollow core optical waveguide comprises a hollow core; and a structured arrangement of longitudinally extending capillaries surrounding the hollow core to form a cladding; wherein one or both of the hollow core and the cladding contains gas configured to provide a refractive index difference between the hollow core and the cladding.

公开(公告)号：US20220155517A1

公开(公告)日：2022-05-19

申请号：US17556324

申请日：2021-12-20

Applicant: University of Southampton

Inventor： Gregory Teofil JASION ,  Francesco POLETTI

IPC: G02B6/032 ,  C03B37/027 ,  G02B6/02

Abstract: A hollow core optical fibre comprises a tubular jacket; a cladding comprising a plurality of primary capillaries spaced apart from one another in a ring and each bonded to an inner surface of the jacket at a peripheral location around the circumference of the jacket; and a hollow core formed by a central void within the ring of primary capillaries; wherein the cladding further comprises, within each primary capillary, two secondary capillaries and no more, the two secondary capillaries spaced apart from one another and each bonded to an inner surface of the primary capillary at an azimuthal location around the circumference of the primary capillary which is displaced from the peripheral location of the primary capillary.

公开(公告)号：US20240190754A1

公开(公告)日：2024-06-13

申请号：US18582351

申请日：2024-02-20

Applicant: University of Southampton

Inventor： Natalie WHEELER ,  Peter SHARDLOW ,  Francesco POLETTI

IPC: C03B37/012 ,  C03B23/207 ,  G02B6/02

CPC classification number: C03B37/0122 ,  C03B23/207 ,  C03B37/01225 ,  G02B6/02328 ,  C03B2203/16 ,  C03B2203/42

Abstract: A method of making an optical fibre preform comprising providing a hollow outer tube of glass, providing a hollow primary capillary tube of glass with an outer diameter smaller than an inner diameter of the outer tube, positioning the primary capillary tube inside the outer tube such that an outer surface of the primary capillary tube lies against an inner surface of the outer tube along a contact line parallel to the longitudinal axes of the primary capillary tube and the outer tube, and bonding the primary capillary tube into its position inside the outer tube by directing a laser beam onto a surface of the outer tube or the primary capillary at one or more locations aligned with the contact line.

公开(公告)号：US20210311250A1

公开(公告)日：2021-10-07

申请号：US17266685

申请日：2019-07-31

Applicant: University of Southampton

Inventor： Gregory Teofil JASION ,  Francesco POLETTI

IPC: G02B6/032 ,  G02B6/02 ,  C03B37/027

Abstract: A hollow core optical fibre comprises a tubular jacket; a cladding comprising a plurality of primary capillaries spaced apart from one another in a ring and each bonded to an inner surface of the jacket at a peripheral location around the circumference of the jacket; and a hollow core formed by a central void within the ring of primary capillaries; wherein the cladding further comprises, within each primary capillary, two secondary capillaries and no more, the two secondary capillaries spaced apart from one another and each bonded to an inner surface of the primary capillary at an azimuthal location around the circumference of the primary capillary which is displaced from the peripheral location of the primary capillary.

公开(公告)号：US20200156987A1

公开(公告)日：2020-05-21

申请号：US16628423

申请日：2018-07-04

Applicant: University of Southampton

Inventor： Natalie WHEELER ,  Peter SHARDLOW ,  Francesco POLETTI

IPC: C03B37/012 ,  C03B23/207 ,  G02B6/02

Abstract: A method of making an optical fibre preform comprising providing a hollow outer tube of glass, providing a hollow primary capillary tube of glass with an outer diameter smaller than an inner diameter of the outer tube, positioning the primary capillary tube inside the outer tube such that an outer surface of the primary capillary tube lies against an inner surface of the outer tube along a contact line parallel to the longitudinal axes of the primary capillary tube and the outer tube, and bonding the primary capillary tube into its position inside the outer tube by directing a laser beam onto a surface of the outer tube or the primary capillary at one or more locations aligned with the contact line.