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    OPTICAL FIBER AND METHOD OF MANUFACTURING THE SAME
    2.
    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
    3.
    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
    5.
    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.

    Low bend loss optical fiber
    10.
    发明授权
    Low bend loss optical fiber 有权

    公开(公告)号：US09851501B2

    公开(公告)日：2017-12-26

    申请号：US15463142

    申请日：2017-03-20

    申请人： Corning Incorporated

    发明人： Dana Craig Bookbinder ,  Ming-Jun Li ,  Snigdharaj Kumar Mishra ,  Pushkar Tandon

    IPC分类号： G02B6/036 ,  G02B6/02

    CPC分类号： G02B6/03672 ,  G02B6/02009 ,  G02B6/02014 ,  G02B6/02395 ,  G02B6/0365

    摘要： Disclosed herein are optical waveguide fibers comprising: (I) a core comprising an outer radius r1, a maximum refractive index delta percent Δ1 max and core alpha, α, of larger than 5; and (II) a cladding surrounding the core, the cladding comprising: (i) an inner cladding region having outer radius r2 and refractive index delta percent Δ2, wherein Δ1max>Δ2; (ii) a trench region surrounding the inner cladding region, the trench region having an outer radius, r3 where r3≧10 microns and refractive index delta percent Δ3; and (iii) an outer cladding region having chlorine concentration of ≧1.2 wt. % surrounding the trench region and comprising refractive index delta percent Δ4, wherein Δ1max>Δ4 and Δ2>Δ3, and Δ4>Δ3 and wherein the difference between Δ4 and Δ3 is ≧0.12 percent.