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    BROADBAND ACCESS OPTIMIZED FIBER AND METHOD OF MAKING
    4.
    发明公开
    BROADBAND ACCESS OPTIMIZED FIBER AND METHOD OF MAKING 审中-公开
    对宽带接入增强的纤维及其制备方法

    公开(公告)号：EP1478956A4

    公开(公告)日：2006-12-13

    申请号：EP03709327

    申请日：2003-02-26

    Applicant: CORNING INC

    Inventor： BERKEY GEORGE E ,  LIU YANMING ,  LOVE WALTER F ,  MA DAIPING

    IPC: G02B6/02 ,  G02B6/028

    CPC classification number: G02B6/0288 ,  G02B6/02019 ,  G02B6/02047 ,  G02B6/02266

    Abstract: An optical fiber is disclosed herein comprising a core having an alpha parameter in the range of approximately 2 to approximately 8, a maximum index percent difference between the core and a cladding in the range of approximately 0.3% to approximately 0.5% and a core diameter in the range of approximately 6.0 to approximately 16.0 microm and a cladding. The optical fiber has a bandwidth of at least approximately 0.6 GHz.km at 850 nm, and is configured for multimode operation at a wavelength less than 1300 nm and single mode operation at a wavelength of at least approximately 1300 nm. The fiber also has significantly reduced intermodal noise. Also disclosed herein is a method of designing such a fiber, a fiber optic system provided such a fiber and a method of operating a fiber optic system with such a fiber.

    BROADBAND ACCESS OPTIMIZED FIBER AND METHOD OF MAKING
    5.
    发明公开
    BROADBAND ACCESS OPTIMIZED FIBER AND METHOD OF MAKING 审中-公开
    对宽带接入增强的纤维及其制备方法

    公开(公告)号：EP1478956A1

    公开(公告)日：2004-11-24

    申请号：EP03709327.5

    申请日：2003-02-26

    Applicant: CORNING INCORPORATED

    Inventor： BERKEY, George E ,  LIU, Yanming ,  LOVE, Walter F ,  MA, Daiping

    IPC: G02B6/02

    CPC classification number: G02B6/0288 ,  G02B6/02019 ,  G02B6/02047 ,  G02B6/02266

    Abstract: An optical fiber is disclosed herein comprising a core having an alpha parameter in the range of approximately 2 to approximately 8, a maximum index percent difference between the core and a cladding in the range of approximately 0.3% to approximately 0.5% and a core diameter in the range of approximately 6.0 to approximately 16.0 µm and a cladding. The optical fiber has a bandwidth of at least approximately 0.6 GHz.km at 850 nm, and is configured for multimode operation at a wavelength less than 1300 nm and single mode operation at a wavelength of at least approximately 1300 nm. The fiber also has significantly reduced intermodal noise. Also disclosed herein is a method of designing such a fiber, a fiber optic system provided such a fiber and a method of operating a fiber optic system with such a fiber.

    OPTICAL FIBRE FILTER
    6.
    发明公开
    OPTICAL FIBRE FILTER 有权
    光纤FILTER

    公开(公告)号：EP1330668A1

    公开(公告)日：2003-07-30

    申请号：EP01992905.8

    申请日：2001-10-23

    Applicant: PIRELLI S.p.A.

    Inventor： VAVASSORI, Paolo ,  IOMMI, Alessandro

    IPC: G02B6/22 ,  G02B6/14

    CPC classification number: G02B6/02047 ,  G02B6/02052 ,  G02B6/2552 ,  G02B6/29352 ,  G02B6/2938

    Abstract: An optical fibre filter (1, 1') comprises a dual-mode optical fibre (2) which includes a core (3) and a cladding (4) and through which an optical signal can pass; a pair of coupling regions (8, 9) formed in the optical fibre (2) at a predefined mutual distance (L) so as to produce a power transfer between a first and a second propagation modes (LP01, LP11) of the optical signal; and a phase shift region (10) defined by a section of the fibre (2) lying between the coupling regions (10) defined by a section of the fibre (2) lying between the coupling regions (8, 9), for producing a phase shift between the first and second propagation modes (LP01, LP11); in which, in the coupling regions (8, 9), the optical fibre (2) has, in cross section, an asymmetrical refractive index profile.

    Low-loss dual-mode optical fiber compensators
    7.
    发明公开
    Low-loss dual-mode optical fiber compensators 失效
    低损耗双峰光纤补偿。

    公开(公告)号：EP0652450A1

    公开(公告)日：1995-05-10

    申请号：EP94308075.4

    申请日：1994-11-02

    Applicant: AT&T Corp.

    Inventor： Poole, Craig Douglas

    IPC: G02B6/16 ,  G02B6/26 ,  H04B10/18 ,  G02B6/14

    CPC classification number: G02B6/29376 ,  G02B6/02047 ,  G02B6/14 ,  G02B6/29395

    Abstract: It has been discovered that improved performance and reduced size can be realized in dual-mode fiber dispersion compensators by careful alignment of the mode pattern relative to the plane of the bend of the spooled fiber. In particular, minimum loss occurs when the null line of the LP₁₁ mode lies in the plane of the bend. Arrangements for insuring that the fiber assumes the correct orientation for minimum bending loss are disclosed.

    Few-mode/single-mode fiber
    8.
    发明公开
    Few-mode/single-mode fiber 失效
    Wenigmoden- / monomoden-Faser。

    公开(公告)号：EP0307228A2

    公开(公告)日：1989-03-15

    申请号：EP88308355.2

    申请日：1988-09-09

    Applicant: Corning Glass Works

    Inventor： Bhagavatula, Venkata Adieseshaiah

    IPC: G02B6/16 ,  G02B6/22

    CPC classification number: G02B6/0281 ,  G02B6/02047 ,  G02B6/02228 ,  G02B6/0286 ,  G02B6/03611 ,  G02B6/03627 ,  G02B6/03633 ,  G02B6/03644 ,  G02B6/0365 ,  G02B6/03666

    Abstract: The present invention pertains to an optical fiber comprising a transparent core having a maximum refractive index n 1 and a radius a surrounded by a layer of transparent cladding material having a refractive index no which is less than n 1- The refractive indices n 1 and no, the radius a, and the refractive index profile of the core are designed such that:

    (a) Δτ j , the difference between |d(Vb)/dV| j , the normalized delay time of the jth mode and |d(Vb)/dV|0, the normalized delay time of the fundamental mode, is less than about 5 x 10- 2 over a wide range of V-values where j is equal to 1 or 2 and represents the highest order mode that propagates with a low loss, 0 represents the fundamental mode, b is the propagation constant and V is the normalized frequency, and
    (b) the normalized waveguide dispersion Vd 2 (Vb)/dV 2 is about equal to or less than 0.2 at V-values near Vl, the normalized cutoff frequency of the first higher order mode. A fiber exhibiting characteristics (a) and (b) is capable of providing mode equalized two-mode or three-mode and low dispersion single-mode operation.

    Abstract translation: 本发明涉及一种光纤，其包括具有最大折射率n1的透明芯和由折射率小于n1的折射率n0的透明包覆材料层包围的半径A. 折射率n1和n0，半径a和芯的折射率分布被设计为：（a）DELTAτj，| d（Vb）/ dV | j之间的差，归一化的延迟时间 第j个模式和| d（Vb）/ dV|0，基本模式的归一化延迟时间在V值的宽范围内小于约5×10 <2>，其中j等于1或 2表示以低损耗传播的最高阶模式，0表示基模，b表示传播常数，V表示归一化频率，（b）归一化波导色散Vd 2（Vb）/ dV < 2>在V1_c附近的V值为约等于或小于0.2，第一高阶模式的归一化截止频率。 具有特征（a）和（b）的光纤能够提供模式均衡的双模式或三模式和低色散单模操作。 Ë

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