公开(公告)号：US11467335B2

公开(公告)日：2022-10-11

申请号：US16930811

申请日：2020-07-16

Applicant: CORNING INCORPORATED

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

IPC: G02B6/02 ,  G02B6/036 ,  H04B10/66 ,  G02B6/028 ,  H04B10/25 ,  H04B10/50

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 wavelengths greater than 1260 nm and few-mode operation at wavelengths in a wavelength range from 800 nm and 1100 nm. The mode-field diameter is in the range from 8.0 microns to 10.1 microns at 1310 nm. The optical fibers have an overfilled bandwidth OFL BW of at least 1 GHz·km at at least one wavelength in the wavelength range. The optical fibers have a single-step or two-step core and can have a trench refractive index profile. VCSEL based optical transmission systems and methods are disclosed that utilize both single core and multicore versions of the optical fiber.

公开(公告)号：US11012154B2

公开(公告)日：2021-05-18

申请号：US16905117

申请日：2020-06-18

Applicant: CORNING INCORPORATED

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

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

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.

公开(公告)号：US12267106B2

公开(公告)日：2025-04-01

申请号：US17725924

申请日：2022-04-21

Applicant: CORNING INCORPORATED

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

IPC: H04B10/07 ,  H04B10/079 ,  H04B10/2581 ,  H04B10/54 ,  H04B10/077 ,  H04B10/25

Abstract: A method including transmitting an intensity-modulated light through a mode conditioner to generate a mode-conditioned intensity-modulated light in one or a plurality of launch conditions and transmitting the mode-conditioned intensity-modulated light through a multimode optical fiber under test (FUT) to excite a plurality of modes of the FUT. The method further includes converting the mode-conditioned intensity-modulated light transmitted through the FUT into an electrical signal, measuring, based on the electrical signal, a complex transfer function CTF(f) of the FUT, and obtaining an output pulse based on the measured complex transfer function CTF(f) from one or a plurality of launch conditions and an assumed input pulse using the equation: Pout (t)=−1(CTF(f)*(Pin(t))). Wherein, Pout (t) is the output pulse, −1(CTF(f)*(Pin(t))) is the inverse Fourier transform of the function CTF(f)*(Pin (t)), and (Pin(t)) is the Fourier transform of the assumed input pulse. Additionally, the method includes calculating modal bandwidth of the FUT based on Pout(t).

公开(公告)号：US20220137289A1

公开(公告)日：2022-05-05

申请号：US17514060

申请日：2021-10-29

Applicant: CORNING INCORPORATED

Inventor： Xin Chen ,  Hao Dong ,  Kangmei Li ,  Ming-Jun Li ,  Pushkar Tandon ,  Scott Robertson Bickham

IPC: G02B6/028 ,  G02B6/02

Abstract: A optical fiber comprising a central core region having an outer radius r1 of 3 μm to 7 μm, and a maximum refractive index Δ1 of 0.25% to 0.5% and an alpha (a) profile of 1 to 20; a cladding region comprising (i) a first inner cladding region surrounding the core, having a refractive index Δ2 of −0.25% to 0.05% and a radius r2 of 6 μm to 15 μm, (ii) a second inner cladding region, surrounding the first inner cladding region, having a refractive index Δ3 of −0.1% to 0.2% and a radius r3 of 7 μm to 15 μm, and (iii) an outer cladding region, surrounding the second inner cladding region, having a refractive index Δ4 between −0.05% to 0.1%; wherein the optical fiber exhibits a cable cutoff of less than 1260 nm, a mode field diameter at 1310 nm of greater than 8.2 microns.

公开(公告)号：US20210026063A1

公开(公告)日：2021-01-28

申请号：US16930811

申请日：2020-07-16

Applicant: CORNING INCORPORATED

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

IPC: G02B6/02 ,  G02B6/036 ,  G02B6/028 ,  H04B10/25 ,  H04B10/50 ,  H04B10/66

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 λd C of equal to or below 1260 nm thereby defining single mode operation at wavelengths greater than 1260 nm and few-mode operation at wavelengths in a wavelength range from 800 nm and 1100 nm. The mode-field diameter is in the range from 8.0 microns to 10.1 microns at 1310 nm. The optical fibers have an overfilled bandwidth OFL BW of at least 1GHz·km at at least one wavelength in the wavelength range. The optical fibers have a single-step or two-step core and can have a trench refractive index profile. VCSEL based optical transmission systems and methods are disclosed that utilize both single core and multicore versions of the optical fiber.

公开(公告)号：US20230305221A1

公开(公告)日：2023-09-28

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

CPC classification number: G02B6/02004 ,  G02B6/0281 ,  G02B6/0365

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.

公开(公告)号：US20230088292A1

公开(公告)日：2023-03-23

申请号：US17795947

申请日：2021-01-29

Applicant: CORNING INCORPORATED ,  President and Fellows of Harvard College

Inventor： Federico Capasso ,  Wei-Ting Chen ,  Paulo Clovis Dainese, Jr. ,  Kangmei Li ,  Ming-Jun Li ,  Jaewon Oh ,  Jun Yang

IPC: G02B6/293 ,  G02B1/00

Abstract: An optical system, comprising: (i) multiple input optical fibers; (ii) an optical mode multiplexer/demultiplexer coupled to said input optical fibers with, said optical mode multiplexer/demultiplexer comprising a plurality of metamaterial structures having length and forming at least one stage of metamaterials, the at least one stage of metamaterials is being situated on a surface of the optical mode multiplexer/demultiplexer facing the input optical fibers, and the at least one stage of metamaterials is oriented at angles between 60 and 120 degrees relative to the axis of the input fibers; and the metasurfaces are structured to receive a first optical signal having a first mode from at least one of said multiple input optical fibers and convert the first mode to a different mode.

公开(公告)号：US20230054228A1

公开(公告)日：2023-02-23

申请号：US17795935

申请日：2021-01-29

Applicant: CORNING INCORPORATED ,  President and Fellows of Harvard College

Inventor： Federico Capasso ,  Wei-Ting Chen ,  Paulo Clovis Dainese, JR. ,  Kangmei Li ,  Ming-Jun Li ,  Jaewon Oh ,  Jun Yang

IPC: H04B10/2581 ,  H04J14/02 ,  G02B1/00

Abstract: Systems, devices, and techniques for performing wavelength division multiplexing or demultiplexing using one or more metamaterials in an optical communications systems are described. An optical device may be configured to shift one or more phase profiles of an optical signal using one or more stages of metamaterials to multiplex or demultiplex wavelengths of optical signals. The optical device may be an example of a stacked design with two or more stages of metamaterials stacked on top of one another. The optical device may be an example of a folded design that reflects optical signals between different stages of metamaterials.

公开(公告)号：US20220376786A1

公开(公告)日：2022-11-24

申请号：US17725924

申请日：2022-04-21

Applicant: CORNING INCORPORATED

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

IPC: H04B10/079 ,  H04B10/54 ,  H04B10/2581

Abstract: A method including transmitting an intensity-modulated light through a mode conditioner to generate a mode-conditioned intensity-modulated light in one or a plurality of launch conditions and transmitting the mode-conditioned intensity-modulated light through a multimode optical fiber under test (FUT) to excite a plurality of modes of the FUT. The method further includes converting the mode-conditioned intensity-modulated light transmitted through the FUT into an electrical signal, measuring, based on the electrical signal, a complex transfer function CTF(f) of the FUT, and obtaining an output pulse based on the measured complex transfer function CTF(f) from one or a plurality of launch conditions and an assumed input pulse using the equation: Pout (t)=−1(CTF(f)*(Pin(t))). Wherein, Pout (t) is the output pulse, −1(CTF(f)*(Pin(t))) is the inverse Fourier transform of the function CTF(f)*(Pin (t)), and (Pin(t)) is the Fourier transform of the assumed input pulse. Additionally, the method includes calculating modal bandwidth of the FUT based on Pout(t).

公开(公告)号：US12169306B2

公开(公告)日：2024-12-17

申请号：US17795947

申请日：2021-01-29

Applicant: CORNING INCORPORATED ,  President and Fellows of Harvard College

Inventor： Federico Capasso ,  Wei-Ting Chen ,  Paulo Clovis Dainese, Jr. ,  Kangmei Li ,  Ming-Jun Li ,  Jaewon Oh ,  Jun Yang

IPC: G02B6/293 ,  G02B1/00

Abstract: An optical system, comprising: (i) multiple input optical fibers; (ii) an optical mode multiplexer/demultiplexer coupled to said input optical fibers with, said optical mode multiplexer/demultiplexer comprising a plurality of metamaterial structures having length and forming at least one stage of metamaterials, the at least one stage of metamaterials is being situated on a surface of the optical mode multiplexer/demultiplexer facing the input optical fibers, and the at least one stage of metamaterials is oriented at angles between 60 and 120 degrees relative to the axis of the input fibers; and the metasurfaces are structured to receive a first optical signal having a first mode from at least one of said multiple input optical fibers and convert the first mode to a different mode.