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    OPTICAL FIBER WITH A LARGE EFFECTIVE AREA
    1.
    发明公开
    OPTICAL FIBER WITH A LARGE EFFECTIVE AREA 审中-公开

    公开(公告)号：US20240280744A1

    公开(公告)日：2024-08-22

    申请号：US18340868

    申请日：2023-06-25

    申请人： Sterlite Technologies Limited

    发明人： PRAMOD R. WATEKAR ,  Malleswara Rao LANKE ,  Arvind MISHRA

    IPC分类号： G02B6/02

    CPC分类号： G02B6/02009 ,  G02B6/02214

    摘要： The present invention relates to an optical fiber (200) having a core (202) extending along a central axis (206) and a cladding (204) concentrically surrounding the core (202). The core (202) has at least 83-mole percent (mol %) of Silicon dioxide (SiO2) and at most 17-mole percent (mol %) of an up-dopant and, the cladding (204) has at least 99-mole percent (mol %) of Silicon dioxide (SiO2). Further, the optical fiber (200) has (i) an effective area of greater than or equal to 100 μm2, (ii) a mode field diameter (MFD) in a range of 11 μm to 15 μm, and (iii) a chromatic dispersion of less than or equal to 23.5 picoseconds (ps/(Km·nm) at a wavelength of 1550 nm.

    OPTICAL FIBER WITH INVERSE TRIANGULAR TRENCH DESIGN
    2.
    发明公开
    OPTICAL FIBER WITH INVERSE TRIANGULAR TRENCH DESIGN 审中-公开

    公开(公告)号：US20230266525A1

    公开(公告)日：2023-08-24

    申请号：US18137808

    申请日：2023-04-21

    申请人： CORNING INCORPORATED

    发明人： Ming-Jun Li ,  Pushkar Tandon

    IPC分类号： G02B6/028 ,  G02B6/02 ,  G02B6/036

    CPC分类号： G02B6/0286 ,  G02B6/02009 ,  G02B6/0281 ,  G02B6/0283 ,  G02B6/03622 ,  G02B6/0365 ,  G02B6/02347 ,  G02B6/4403

    摘要： A single mode optical fiber is provided that includes a core region having an outer radius r1 and a maximum relative refractive index Δ1max. The single mode optical fiber further includes a cladding region surrounding the core region, the cladding region includes a depressed-index cladding region, a relative refractive index Δ3 of the depressed-index cladding region increasing with increased radial position. The single mode optical fiber has a bend loss at 1550 nm for a 15 mm diameter mandrel of less than about 0.75 dB/turn, a bend loss at 1550 nm for a 20 mm diameter mandrel of less than about 0.2 dB/turn, and a bend loss at 1550 nm for a 30 mm diameter mandrel of less than 0.005 dB/turn. Additionally, the single mode optical fiber has a mode field diameter of 9.0 microns or greater at 1310 nm wavelength.

    OPTICAL FIBER AND METHOD OF MANUFACTURING THE SAME
    5.
    发明申请
    OPTICAL FIBER AND METHOD OF MANUFACTURING THE SAME 审中-公开

    公开(公告)号：US20190049663A1

    公开(公告)日：2019-02-14

    申请号：US16037186

    申请日：2018-07-17

    申请人： FUJIKURA LTD.

    发明人： Ryo Maruyama

    IPC分类号： G02B6/036 ,  G02B6/02 ,  G02B6/028

    CPC分类号： G02B6/03644 ,  G02B6/02009 ,  G02B6/021 ,  G02B6/02214 ,  G02B6/02342 ,  G02B6/0281 ,  G02B6/0288 ,  G02B6/03627

    摘要： An optical fiber includes a core, a depressed inner cladding surrounding the core, and an outer cladding surrounding the inner cladding, where a refractive index profile of the core includes an α power distribution in which an index α is 3.5 or more and 6 or less, a relative refractive index difference Δ− of the inner cladding with respect to the adding is set such that an absolute value |Δ−| thereof is 0.01% or more and 0.045% or less, a radius r1 of the core and an outer circumference radius r2 of the inner cladding are set such that a ratio r1/r2 thereof is 0.2 or more and 0.6 or less, a cable cutoff wavelength λcc of 22 m is 1260 nm or less, and a mode field diameter MFD at a wavelength of 1310 nm is 8.6 μm or more and 9.5 μm or less.

    Polarizing and polarization maintaining leakage channel fibers
    6.
    发明授权
    Polarizing and polarization maintaining leakage channel fibers 有权

    公开(公告)号：US10036850B2

    公开(公告)日：2018-07-31

    申请号：US15146693

    申请日：2016-05-04

    申请人： IMRA America, Inc.

    发明人： Shigeru Suzuki ,  Hugh A. McKay ,  Martin E. Fermann

    IPC分类号： G02B6/024 ,  G02B6/02 ,  G02B6/036

    CPC分类号： G02B6/024 ,  G02B6/02009 ,  G02B6/02042 ,  G02B6/02314 ,  G02B6/02319 ,  G02B6/02342 ,  G02B6/02357 ,  G02B6/03694

    摘要： This disclosure relates to polarizing optical fibers and polarization maintaining optical fibers, including active and/or passive implementations. An embodiment includes a polarizing (PZ) optical fiber that includes stress applying parts (SAPs) disposed in a first cladding region, the SAPs comprising a material with a thermal expansion coefficient, αSAP. A core region is at least partially surrounded by cladding features and the SAPs. The core includes glass with a thermal expansion coefficient, αcore. The arrangement of the SAPs satisfies: Rsc=dSAP/Dsc, where Dsc is the SAP center to core center distance, and dSAP is the average SAP diameter, and dα=|αSAP−αcore|, and where Rsc and dα may be sufficiently large to induce stress birefringence into the core and to provide for polarized output. Active fibers in which a portion of the fiber is doped may be implemented for application in fiber lasers, fiber amplifiers, and/or optical pulse compressors.

    PHOTONIC CRYSTAL FIBER
    8.
    发明申请
    PHOTONIC CRYSTAL FIBER 审中-公开

    公开(公告)号：US20180172902A1

    公开(公告)日：2018-06-21

    申请号：US15563988

    申请日：2016-03-22

    申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    发明人： Takashi MATSUI ,  Kyozo TSUJIKAWA ,  Fumihiko YAMAMOTO ,  Nobutomo HANZAWA

    IPC分类号： G02B6/02

    CPC分类号： G02B6/02328 ,  G02B6/02009 ,  G02B6/02309 ,  G02B6/02314 ,  G02B6/02347

    摘要： An object of the present invention is to provide a structure of an optical fiber capable of satisfying desired requirements of an output power, a propagation distance, and a beam quality. In the design of the PCF of the present invention, the PCF has air holes having diameters d and intervals Λ in an overlapping region where a region of Aeff of a desired value or more and a cutoff region in a desired higher-order mode overlap each other on a graph where the horizontal axis represents d/Λ and the vertical axis represents Λ, so that it is possible to sufficiently cut off the mode which is the desired higher-order mode or more, and thus, it is possible to select a region where the Aeff is large.