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    Single mode optical fiber with low bend loss at small and large bend diameters
    1.
    发明授权
    Single mode optical fiber with low bend loss at small and large bend diameters 有权

    公开(公告)号：US11307350B2

    公开(公告)日：2022-04-19

    申请号：US16944485

    申请日：2020-07-31

    Applicant: CORNING INCORPORATED

    Inventor： Ming-Jun Li ,  Snigdharaj Kumar Mishra ,  Pushkar Tandon

    IPC: G02B6/036 ,  G02B6/02

    Abstract: The single mode optical fiber disclosed herein has a core, an inner cladding, a trench and an outer cladding, along with a non-glass protective coating. The refractive index profile of the optical fiber is such that the optical fiber has relatively low bend loss at both small and large bend diameters. The relative refractive indices of the inner cladding, trench and outer cladding are such that a tunneling point that arises during bending is pushed out beyond the trench and thus sufficiently far away from the core so that bending losses for both small and large radius bends are relatively small.

    OPTICAL FIBER WITH DUAL TRENCH DESIGN
    2.
    发明申请
    OPTICAL FIBER WITH DUAL TRENCH DESIGN 有权

    公开(公告)号：US20210364690A1

    公开(公告)日：2021-11-25

    申请号：US17319167

    申请日：2021-05-13

    Applicant: CORNING INCORPORATED

    Inventor： Snigdharaj Kumar Mishra ,  Pushkar Tandon

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

    Abstract: 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 has a bend loss at 1550 nm for a 15 mm diameter mandrel of less than about 0.75 dB/turn, has 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 0.002 dB/turn. Additionally, the single mode optical fiber has a mode field diameter of 9.0 microns or greater at 1310 nm wavelength and a cable cutoff of less than or equal to about 1260 nm.

    Moatless bend-optimized multimode fiber
    5.
    发明授权
    Moatless bend-optimized multimode fiber 有权
    无气道弯曲优化多模光纤

    公开(公告)号：US09360619B2

    公开(公告)日：2016-06-07

    申请号：US14734160

    申请日：2015-06-09

    Applicant: Corning Incorporated

    Inventor： Dana Craig Bookbinder ,  Oleksandr Kogan ,  Ming-Jun Li ,  Snigdharaj Kumar Mishra ,  Pushkar Tandon

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

    CPC classification number: G02B6/0288 ,  G02B6/0281 ,  G02B6/03627 ,  G02B6/03694

    Abstract: An optical fiber including a multimode core having a radius, R1, and a maximum relative refractive index, α1MAX, at a wavelength λ0, an inner clad region surrounding the core and having a radial thickness, T2, and a minimum relative refractive index, Δ2MIN, of about 0.0% at a wavelength of λ0, and an outer clad layer, which is doped with chlorine at greater than or equal to 0.5 weight %, surrounding the inner clad region and having a radial thickness, T3, and a maximum relative refractive index, Δ3MAX, at a wavelength of λ0. The optical fiber satisfies the following relationship: Δ1MAX>Δ3MAX>Δ2MIN, and the optical fiber exhibits an overfilled bandwidth of greater than or equal to about 1.5 GHz-km at λ0.

    Abstract translation: 一种光纤，包括具有半径R1和最大相对折射率α1MAX的波长λ0的多模纤芯，围绕芯的内包层区域，具有径向厚度T2和最小相对折射率Dgr ;波长为λ0约为0.0％的2MIN和围绕内包层区域并且具有径向厚度T3和最大值的大于或等于0.5重量％的氯的外包层 相对折射率，＆Dgr; 3MAX，波长λ0。 该光纤满足以下关系：＆Dgr; 1MAX>＆Dgr; 3MAX>＆Dgr; 2MIN，并且光纤在λ0处表现出大于或等于约1.5GHz-km的过满的带宽。

    MOATLESS BEND-OPTIMIZED MULTIMODE FIBER
    6.
    发明申请
    MOATLESS BEND-OPTIMIZED MULTIMODE FIBER 有权
    无弯曲优化多模光纤

    公开(公告)号：US20150378092A1

    公开(公告)日：2015-12-31

    申请号：US14734160

    申请日：2015-06-09

    Applicant: Corning Incorporated

    Inventor： Dana Craig Bookbinder ,  Oleksandr Kogan ,  Ming-Jun Li ,  Snigdharaj Kumar Mishra ,  Pushkar Tandon

    IPC: G02B6/028 ,  G02B6/036

    CPC classification number: G02B6/0288 ,  G02B6/0281 ,  G02B6/03627 ,  G02B6/03694

    Abstract: An optical fiber including a multimode core having a radius, R1, and a maximum relative refractive index, α1MAX, at a wavelength λ0, an inner clad region surrounding the core and having a radial thickness, T2, and a minimum relative refractive index, Δ2MIN, of about 0.0% at a wavelength of λ0, and an outer clad layer, which is doped with chlorine at greater than or equal to 0.5 weight %, surrounding the inner clad region and having a radial thickness, T3, and a maximum relative refractive index, Δ3MAX, at a wavelength of λ0. The optical fiber satisfies the following relationship: Δ1MAX>Δ3MAX>Δ2MIN, and the optical fiber exhibits an overfilled bandwidth of greater than or equal to about 1.5 GHz-km at λ0.

    Abstract translation: 一种光纤，包括具有半径R1和最大相对折射率α1MAX的波长λ0的多模纤芯，围绕芯的内包层区域，具有径向厚度T2和最小相对折射率Dgr ;波长为λ0约为0.0％的2MIN和围绕内包层区域并且具有径向厚度T3和最大值的大于或等于0.5重量％的氯的外包层 相对折射率，＆Dgr; 3MAX，波长λ0。 该光纤满足以下关系：＆Dgr; 1MAX>＆Dgr; 3MAX>＆Dgr; 2MIN，并且光纤在λ0处表现出大于或等于约1.5GHz-km的过满的带宽。

    Large effective area fiber with low bending losses
    7.
    发明授权
    Large effective area fiber with low bending losses 有权
    具有低弯曲损耗的大面积纤维

    公开(公告)号：US09057814B2

    公开(公告)日：2015-06-16

    申请号：US14189182

    申请日：2014-02-25

    Applicant: Corning Incorporated

    Inventor： Scott Robertson Bickham ,  Snigdharaj Kumar Mishra ,  Manuela Ocampo ,  Joan Diana Patterson

    IPC: G02B6/02 ,  G02B6/36 ,  G02B6/036

    CPC classification number: G02B6/02019 ,  G02B6/02395 ,  G02B6/03627

    Abstract: A fiber having a large effective area at 1550 nm of at least 130 μm2 and a wire mesh drum microbending loss of less than 0.4 dB/km at a wavelength of 1550 nm. The fibers may include a core, a cladding, and a coating. The core may include a central core region and a surrounding first core region. The cladding may include a depressed index inner cladding region and an outer cladding region. The coating may include a primary coating surrounding the cladding and a secondary coating surrounding the primary coating. The primary coating may be formed from a primary composition that may include an acrylate monomer or an N-vinyl amide monomer in combination with an acrylate oligomer, where the acrylate oligomer is present at 35 wt % to 55 wt %. The secondary coating may be formed from a secondary composition including one or more acrylate or diacrylate monomers and an acrylate or methacrylate oligomer, where the oligomer is present at 3 wt % or less.

    Abstract translation: 在1550nm具有大的有效面积至少为130μm2的光纤和在1550nm的波长处的小于0.4dB / km的丝网鼓微弯曲损耗。 纤维可以包括芯，包层和涂层。 芯可以包括中心芯区域和周围的第一芯区域。 包层可以包括凹陷的折射率内包层区域和外包层区域。 涂层可以包括围绕包层的初级涂层和围绕初级涂层的二次涂层。 初级涂层可以由主要组合物形成，其可以包含丙烯酸酯单体或N-乙烯基酰胺单体与丙烯酸酯低聚物的组合，其中丙烯酸酯低聚物以35重量％至55重量％存在。 二次涂层可以由包含一种或多种丙烯酸酯或二丙烯酸酯单体和丙烯酸酯或甲基丙烯酸酯低聚物的二次组合物形成，其中低聚物以3重量％以下存在。

    SINGLE-MODE OPTICAL FIBERS WITH LOW CUTOFF WAVELENGTH AND LOW BEND LOSS
    8.
    发明公开
    SINGLE-MODE OPTICAL FIBERS WITH LOW CUTOFF WAVELENGTH AND LOW BEND LOSS 审中-公开

    公开(公告)号：US20240255694A1

    公开(公告)日：2024-08-01

    申请号：US18411175

    申请日：2024-01-12

    Applicant: CORNING INCORPORATED

    Inventor： Scott Robertson Bickham ,  Martin Hempstead ,  Snigdharaj Kumar Mishra ,  Stephen Quenton Smith ,  Pushkar Tandon

    IPC: G02B6/028 ,  G02B6/02

    CPC classification number: G02B6/0281 ,  G02B6/02009

    Abstract: An optical fiber having a silica-based core region with an outer radius r1 from about 4.0 microns to about 4.6 microns and a core volume from about 4.5% Δ-micron2 to about 5.5% Δ-micron2. The optical fiber further includes a depressed-index cladding region and an outer cladding region. The depressed-index cladding region having an inner radius r2 such that r1/r2 is greater than about 0.4 and less than about 0.6 and a trench volume between about −50% Δ-micron2s and about −20% Δ-micron2. The optical fiber has a mode field diameter at 1310 nm from about 8.8 microns to about 9.4 microns, a 2 m cable cutoff from about 1120 nm to about 1260 nm, a bending loss at 1310 nm, as determined by the mandrel wrap test using a 15 mm diameter mandrel, of less than 1.0 dB/turn, and a zero dispersion wavelength between 1300 nm and 1324 nm.

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