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    Single mode optical fiber with chlorine doped core and low bend loss
    31.
    发明授权
    Single mode optical fiber with chlorine doped core and low bend loss 有权

    公开(公告)号：US10444427B2

    公开(公告)日：2019-10-15

    申请号：US15660024

    申请日：2017-07-26

    Applicant: Corning Incorporated

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

    IPC: G02B6/036 ,  G02B6/02 ,  G02B6/44 ,  G02B6/028

    Abstract: Single mode optical fibers with a chlorine doped core and a cladding having a fluorine doped trench region are disclosed. The optical fiber includes a chlorine doped silica core having a core alpha α≥10, a core radius r1 and maximum refractive index delta Δ1max % and a Cl concentration≥0.9 wt %. The optical fiber also has a cladding surrounding the core, the cladding having an inner and an outer cladding. The inner cladding has first and second cladding regions. The optical fiber has mode field diameter at 1310 nm of larger than 9 microns, a cable cutoff wavelength of ≤1260 nm, a zero dispersion wavelength λ0, where 1300 nm≤λ0≤1324 nm, and bend loss at 1550 nm for a 20 mm mandrel of less than 0.5 dB/turn.

    QUASI-SINGLE-MODE OPTICAL FIBER
    33.
    发明申请
    QUASI-SINGLE-MODE OPTICAL FIBER 审中-公开

    公开(公告)号：US20190278019A1

    公开(公告)日：2019-09-12

    申请号：US16269112

    申请日：2019-02-06

    Applicant: Corning Incorporated

    Inventor： John David Downie ,  Ming-Jun Li ,  William Allen Wood ,  Aramais Robert Zakharian

    IPC: G02B6/02 ,  G02B6/028 ,  H04B10/2507

    Abstract: A quasi-single-mode (QSM) optical fiber includes a core and a cladding surrounding the core. The core includes a centerline and an outer edge. The cladding includes an interior edge and an exterior edge. The cladding has a cladding outer diameter defined by the exterior edge of the cladding. The cladding outer diameter may be in the range of greater than 170 μm to about 200 μm. The QSM fiber has a cabled cutoff wavelength that is greater than about 1530 nm. The core and the cladding support a fundamental mode LP01 and a higher-order mode LP11. The fundamental mode LP01 has an effective area Aeff>150 μm2.

    Multi-wavelength DMD measurement apparatus and methods
    35.
    发明授权
    Multi-wavelength DMD measurement apparatus and methods 有权

    公开(公告)号：US10260990B2

    公开(公告)日：2019-04-16

    申请号：US14251869

    申请日：2014-04-14

    Applicant: CORNING INCORPORATED

    Inventor： Xin Chen ,  Jason Edward Hurley ,  Ming-Jun Li ,  Richard Stephen Vodhanel

    IPC: G01N21/00 ,  G01M11/00

    Abstract: A differential mode delay (DMD) measurement system for an optical fiber is provided. The system includes an optical test fiber with a plurality of modes; a single mode light source that provides a continuous light wave signal to a modulator; and a pulse generator that provides an electrical pulse train signal to the modulator and a triggering signal to a receiver. The modulator is configured to generate a modulated optical test signal through the optical fiber based at least in part on the received light wave and pulse train signals, and the receiver is configured to receive the test signal transmitted through the fiber and evaluate the test signal based at least in part on the triggering signal. The system can be employed to create DMD waveform and centroid charts to obtain minEMBc bandwidth information for a fiber within a wavelength range.

    MULTI-MODE OPTICAL FIBER AND METHODS FOR MANUFACTURING THE SAME
    36.
    发明申请
    MULTI-MODE OPTICAL FIBER AND METHODS FOR MANUFACTURING THE SAME 审中-公开

    公开(公告)号：US20190101694A1

    公开(公告)日：2019-04-04

    申请号：US16141257

    申请日：2018-09-25

    Applicant: Corning Incorporated

    Inventor： Dana Craig Bookbinder ,  Curtis Richard Cowles ,  Richard Michael Fiacco ,  Ming-Jun Li ,  Jason Roy Pace ,  Jeffery Scott Stone

    IPC: G02B6/028 ,  G02B6/036

    Abstract: Methods of manufacturing multi-mode optical fiber, and multi-mode optical fiber produced thereby, are disclosed. According to embodiments, a method for forming an optical fiber may include heating a multi-mode optical fiber preform and applying a draw tension to a root of the multi-mode optical fiber preform on a long axis of the multi-mode optical fiber preform thereby drawing a multi-mode optical fiber from the root of the multi-mode optical fiber preform. The draw tension may be modulated while the multi-mode optical fiber is drawn from the root of the multi-mode optical fiber preform. Modulating the draw tension introduces stress perturbations in the multi-mode optical fiber and corresponding refractive index perturbations in a core of the multi-mode optical fiber.

    Pressure sensing touch systems and methods
    38.
    发明授权
    Pressure sensing touch systems and methods 有权

    公开(公告)号：US10228799B2

    公开(公告)日：2019-03-12

    申请号：US15591528

    申请日：2017-05-10

    Applicant: CORNING INCORPORATED

    Inventor： Minghan Chen ,  Jacques Gollier ,  Ming-Jun Li ,  Paul Francis Michaloski ,  William James Miller ,  Daniel Aloysius Nolan

    IPC: G06F3/044 ,  G06F3/042 ,  G06F3/045

    Abstract: Pressure-sensing touch systems and methods are disclosed for sensing the occurrence of a touch event based on pressure applied at a touch location. The touch system includes a light-source system and a detector system operably adjacent respective input and output edges of a waveguide. Pressure at a touch location on the waveguide gives rise to a touch event causes the waveguide to bend or flex. The waveguide bending causes a change in the optical paths of light traveling by FTIR, causing the light distribution in the output light to change. The changes are detected and are used to determine whether a touch event occurred, as well as the time-evolution of the touch event. The changes in the output light can include polarization changes caused by birefringence induced in the waveguide by the applied pressure applied. Various detector configurations are disclosed for sensing the location and pressure of a touch event.

    Multimode optical fibers for attenuators
    39.
    发明授权
    Multimode optical fibers for attenuators 有权

    公开(公告)号：US10162109B2

    公开(公告)日：2018-12-25

    申请号：US15881239

    申请日：2018-01-26

    Applicant: Corning Incorporated

    Inventor： Kevin Wallace Bennett ,  Scott Robertson Bickham ,  Dana Craig Bookbinder ,  Robert Arnold Knowlton ,  Ming-Jun Li ,  Pushkar Tandon

    IPC: G02B6/028 ,  G02B6/036

    Abstract: According to embodiments, an optical fiber may include a core portion comprising a radius rC, a centerline CL, a numerical aperture NA greater than or equal to 0.15 and less than or equal to 0.25, a graded relative refractive index profile having a maximum relative refractive index ΔCmax and an α value greater than or equal to 1 and less than or equal to 3. The core portion may include an up-dopant with a graded concentration from the radius rC to the centerline CL and an attenuation dopant with a constant concentration from the centerline CL of the core portion to the radius rC of the core portion. The optical fiber is multi-moded for wavelengths of light within a range from 800 nm to 1350 nm and an attenuation of the optical fiber wavelengths between 800 nm and 1000 nm is greater than or equal to 0.5 dB/m.

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