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    Optical fibers for single mode and few mode VCSEL-based optical fiber transmission systems
    1.
    发明授权
    Optical fibers for single mode and few mode VCSEL-based optical fiber transmission systems 有权

    公开(公告)号：US12164143B2

    公开(公告)日：2024-12-10

    申请号：US17903319

    申请日：2022-09-06

    Applicant: CORNING INCORPORATED

    Inventor： Scott Robertson Bickham ,  Xin Chen ,  Kangmei Li ,  Ming-Jun Li

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

    Abstract: The optical fibers disclosed have single mode and few mode optical transmission for VCSEL-based optical fiber transmission systems. The optical fibers have a cable cutoff wavelength λC of equal to or below 1260 nm thereby defining single mode operation at a wavelength in a first wavelength range greater than 1260 nm and few-mode operation at a wavelength in a second wavelength range from 970 nm and 1070 nm. The mode-field diameter is in the range from 9.3 microns to 10.9 microns at 1550 nm. The optical fibers have an overfilled bandwidth OFL BW of 1 GHz·km to 3 GHz·km at the at least one wavelength in the second wavelength range. VCSEL based optical transmission systems and methods are disclosed that utilize both single core and multicore versions of the optical fiber.

    TENSION-BASED METHODS FOR FORMING BANDWIDTH TUNED OPTICAL FIBERS FOR BI-MODAL OPTICAL DATA TRANSMISSION
    6.
    发明申请
    TENSION-BASED METHODS FOR FORMING BANDWIDTH TUNED OPTICAL FIBERS FOR BI-MODAL OPTICAL DATA TRANSMISSION 有权

    公开(公告)号：US20210032153A1

    公开(公告)日：2021-02-04

    申请号：US16936991

    申请日：2020-07-23

    Applicant: CORNING INCORPORATED

    Inventor： Xin Chen ,  Kangmei Li ,  Ming-Jun Li ,  Snigdharaj Kumar Mishra

    IPC: C03B37/025 ,  G02B6/028 ,  G02B6/02 ,  G02B6/036

    Abstract: Methods of forming a bandwidth-tuned optical fiber for short-length data transmission systems include establishing a relationship between a change Δτ in a modal delay τ, a change ΔT in a draw tension T and a change Δλ in a BM wavelength λ of light in a BM wavelength range from 840 nm and 1100 nm for a test optical fiber drawn from a preform and that supports BM operation at the BM wavelength. The methods also include drawing from either the preform or a closely related preform the bandwidth-tuned optical fiber by setting the draw tension based on the established relationships of the aforementioned parameters so that the bandwidth-tuned optical fiber has a target bandwidth greater than 2 GHz·km at a target wavelength within the BM wavelength range.

    SYSTEMS AND METHODS FOR MEASURING A MODAL DELAY AND A MODAL BANDWIDTH
    7.
    发明申请
    SYSTEMS AND METHODS FOR MEASURING A MODAL DELAY AND A MODAL BANDWIDTH 有权

    公开(公告)号：US20210006331A1

    公开(公告)日：2021-01-07

    申请号：US16905117

    申请日：2020-06-18

    Applicant: CORNING INCORPORATED

    Inventor： Xin Chen ,  Kangmei Li ,  Ming-Jun Li

    IPC: H04B10/079 ,  H04B10/54 ,  H04B10/25 ,  G01M11/00

    Abstract: The present disclosure is directed to systems and methods for calculating a modal time delay and a modal bandwidth. For example, a method may include: transmitting an intensity-modulated light through a mode conditioner to generate a mode-conditioned intensity-modulated light; transmitting the mode-conditioned intensity-modulated light through an optical fiber under test (FUT) to excite a plurality of modes of the optical FUT; converting the mode-conditioned intensity-modulated light transmitted through the optical FUT into an electrical signal; measuring, based on the electrical signal, a transfer function or a complex transfer function of the optical FUT based on at least on one pair of the plurality of modes; calculating a modal delay time of the optical FUT based on the transfer function or the complex transfer function; and calculating a modal bandwidth of the optical FUT based on the modal delay time, the modal bandwidth being calculated for any given launch conditions of the plurality of modes.

    Multi-wavelength DMD measurement apparatus and methods
    8.
    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.

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