Patents by Inventor Ming-Jun Li

Ming-Jun Li has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210294024
    Abstract: A multicore optical fiber includes two or more cores, a common interior cladding surrounding the two or more cores, and a common exterior cladding surrounding the common interior cladding. The common exterior cladding has a lower relative refractive index than the common interior cladding and reduces tunneling losses from the cores. The reduced tunneling loss allows placement of cores closer to the edge of the fiber, thus providing multicore optical fibers having higher core count for a given fiber diameter. Separation between cores is controlled to minimize crosstalk.
    Type: Application
    Filed: March 3, 2021
    Publication date: September 23, 2021
    Inventors: Ming-Jun Li, Gaozhu Peng
  • Patent number: 11125937
    Abstract: An optical fiber with low attenuation and methods of making same are disclosed. The optical fiber has a core, an inner cladding surround the core, and an outer cladding surrounding the inner cladding. The outer cladding is chlorine-doped such that the relative refractive index varies as a function of radius. The radially varying relative refractive index profile of the outer cladding reduces excess stress in the core and inner cladding, which helps lower fiber attenuation while also reducing macrobend and microbend loss. A process of fabricating the optical fiber includes doping an overclad soot layer of a soot preform with chlorine and then removing a portion of the chlorine dopant from an outermost region of the overclad soot layer. The soot preform with the modified chlorine dopant profile is then sintered to form a glass preform, which can then be used for drawing the optical fiber.
    Type: Grant
    Filed: September 7, 2018
    Date of Patent: September 21, 2021
    Assignee: Corning Incorporated
    Inventors: Dana Craig Bookbinder, Paul Andrew Chludzinski, Brian Lee Harper, Ming-Jun Li, Snigdharaj Kumar Mishra, Sonya Marie Raney, Pushkar Tandon
  • Patent number: 11125938
    Abstract: An optical fiber includes (i) a chlorine doped silica based core having a core alpha (Core?)?4, a radius r1, and a maximum refractive index delta ?1max % and (ii) a cladding surrounding the core. The cladding surrounding the core includes a) a first inner cladding region adjacent to and in contact with the core and having a refractive index delta ?2, a radius r2, and a minimum refractive index delta ?2min such that ?2min<?1max, b) a second inner cladding adjacent to and in contact with the first inner cladding having a refractive index ?3, a radius r3, and a minimum refractive index delta ?3min such that ?3min<?2, and c) an outer cladding region surrounding the second inner cladding region and having a refractive index ?5, a radius rmax, and a minimum refractive index delta ?3min such that ?3min<?2.
    Type: Grant
    Filed: January 14, 2020
    Date of Patent: September 21, 2021
    Assignee: Corning Incorporated
    Inventors: Dana Craig Bookbinder, Ming-Jun Li, Snigdharaj Kumar Mishra, Pushkar Tandon
  • Patent number: 11129178
    Abstract: A communication resource allocation method, an allocation device, a base station and a terminal are provided. The communication resource allocation method includes: determining a service type of a current service when a service bearer is established; determining granularity information of time-frequency resource and a frequency domain resource range corresponding to the service type according to the service type of the current service; and transmitting the granularity information of the time-frequency resource and the frequency domain resource range corresponding to the service type to a terminal that requests to establish the service bearer.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: September 21, 2021
    Assignee: YULONG COMPUTER TELECOMMUNICATION SCIENTIFIC (SHENZHEN) CO., LTD.
    Inventors: Ming-Ju Li, Ya-Jun Zhu, Yun-Fei Zhang
  • Publication number: 20210289523
    Abstract: An uplink transmission method and a base station are provided The method includes: determining, by the base station, a time length of a single transmission time interval t and a time delay correction value k corresponding to a service type, sending uplink grant signaling to a terminal, and indicating uplink transmission information of uplink data in the uplink grant signaling; informing the terminal of duration information of the single transmission time interval t, information of the time delay correction value k and the uplink transmission information; receiving the uplink data transmitted by the terminal according to the duration information of the single transmission time interval t, the information of the time delay correction value k and the uplink transmission information, to implement an uplink transmission. The technical solution is beneficial for the base station to adjust the uplink scheduling delay, to satisfy the diversified requirements in the future 5G services.
    Type: Application
    Filed: December 30, 2016
    Publication date: September 16, 2021
    Applicant: YULONG COMPUTER TELECOMMUNICATION SCIENTIFIC (SHENZHEN) CO., LTD.
    Inventors: MING-JU LI, YA-JUN ZHU, YUN-FEI ZHANG
  • Patent number: 11119270
    Abstract: The present description provides reduced-diameter multimode optical fibers. The optical fibers include a reduced-diameter glass fiber and/or reduced-thickness coatings. The overall diameter of the optical fibers is less than 210 ?m and examples with diameters less than 160 ?m are presented. Puncture resistant secondary coatings enable thinning of the secondary coating without compromising protection of the glass fiber. The optical fibers are suitable for data center applications and features high modal bandwidth, low attenuation, low microbending sensitivity, and puncture resistance in a compact form factor.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: September 14, 2021
    Assignee: Corning Incorporated
    Inventors: Scott Robertson Bickham, Yangbin Chen, Ching-Kee Chien, Ming-Jun Li, Pushkar Tandon, Ruchi Tandon
  • Publication number: 20210263215
    Abstract: The present disclosure provides optical fibers with an impact-resistant coating system. The fibers feature low attenuation. The coating system includes a primary coating and a secondary coating. The primary coating and secondary coating have reduced thickness to provide low-diameter fibers without sacrificing protection. The primary coating has high tear strength and is resistant to damage caused by mechanical force. The secondary coating has high puncture resistance. The outer diameter of the optical fiber is less than or equal to 190 ?m.
    Type: Application
    Filed: May 12, 2021
    Publication date: August 26, 2021
    Inventors: Scott Robertson Bickham, Ming-Jun Li, Pushkar Tandon, Ruchi Sarda Tandon
  • Patent number: 11099321
    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 ?C 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 840 nm and 1060 nm. The mode-field diameter is in the range from 8.6 microns to 11 microns at 1550 nm or 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 the at least one wavelength in the second wavelength range. The optical fibers have a gradient-index 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.
    Type: Grant
    Filed: January 20, 2020
    Date of Patent: August 24, 2021
    Assignee: Corning Incorporated
    Inventors: Xin Chen, Ming-Jun Li
  • Publication number: 20210247564
    Abstract: In some embodiments, a data center optical communications system includes: a transmitter comprising a light source, wherein the light source is configured to provide light; an optical fiber operably connected to said transmitter and configured to receive light from the light source, wherein the optical fiber has a length L of 50 km or greater; a receiver configured to receive light from the optical fiber, wherein the receiver includes a detector for detecting the light, wherein the system has a power consumption of 15 W or less
    Type: Application
    Filed: February 3, 2021
    Publication date: August 12, 2021
    Inventors: John David Downie, Ming-Jun Li, Xiaojun Liang, Hui Su
  • Publication number: 20210239900
    Abstract: The wideband multimode co-doped optical fiber has a silica core co-doped with GeO2 and Al2O3. The GeO2 concentration is maximum at the fiber centerline and monotonically decreases radially out to the core radius. The Al2O3 concentration is minimum at the centerline and monotonically increases radially out to maximum concentration at the core radius. The cladding has an inner cladding region of relative refractive index ?2, an intermediate cladding region having a relative refractive index ?3, and an outer cladding region having a relative refractive index ?4, wherein ?3<?2, ?4. The optical fiber has a bandwidth BW?5 GHz·km with a peak wavelength ?P within a wavelength range of 800 nm to 1200 nm and over a wavelength band ?? of at least 100 nm.
    Type: Application
    Filed: April 26, 2021
    Publication date: August 5, 2021
    Inventors: Dana Craig Bookbinder, Ming-Jun Li, Pushkar Tandon
  • Publication number: 20210223469
    Abstract: The optical fiber disclosed has a glass fiber including a core and a cladding. The core comprises silica glass doped with chlorine and having an outer radius r1 between 3.0 microns and 10.0 microns. The cladding has an outer radius r4 not less than 50.0 microns. A primary coating surrounding the cladding has a thickness (r5?r4) between 5.0 microns and 20.0 microns, and an in situ modulus less than 0.30 MPa. A secondary coating surrounding the primary coating has a thickness (r6?r5) between 8.0 microns and 30.0 microns, a Young's modulus greater than 1500 MPa, and a normalized puncture load greater than 3.6×10?3 g/micron2. The optical fiber has a 22-meter cable cutoff wavelength less than 1530 nm, an attenuation at 1550 nm of less than 0.17 dB/km, and a bending loss at 1550 nm of less than 3.0 dB/turn.
    Type: Application
    Filed: January 12, 2021
    Publication date: July 22, 2021
    Inventors: Scott Robertson Bickham, Ming-Jun Li, Snigdharaj Kumar Mishra, Pushkar Tandon, Ruchi Sarda Tandon
  • Patent number: 11067744
    Abstract: A single mode optical fiber, comprising: (i) a silica based core having a step refractive index profile with an alpha of greater than 10, a relative refractive index ?1MAX, and an outer radius r1, wherein 6.25 microns>r1?4.75 microns, the core further comprising Cl, Ge, or a combination thereof; (ii) a first cladding region in contact with and surrounding the core, the first cladding region having a relative refractive index ?2MIN, an inner radius r1, and an outer radius r2, wherein r2<20 microns; and (iii) an outer cladding region surrounding the first cladding region, the outer cladding region having a relative refractive index ?3. The fiber<1300 nm, a 22m cable cutoff wavelength<1260 nm; and a bend loss<0.005 dB/turn when the optical fiber is bent around a 30 mm mandrel; <0.5 dB/turn when the fiber is bent around a 20 mm mandrel.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: July 20, 2021
    Assignee: Corning Incorporated
    Inventors: Scott Robertson Bickham, Dana Craig Bookbinder, Ming-Jun Li, Snigdharaj Kumar Mishra, Pushkar Tandon
  • Publication number: 20210214267
    Abstract: A silica-based substrate includes a glass phase and a dispersed phase having carbon, such that the silica-based substrate has a thickness of at least 10 gm. Also disclosed is a method of forming a silica-based substrate, the method including contacting a porous silica soot preform with an organic solution having at least one hydrocarbon precursor to form a doped silica soot preform and heating the doped silica soot preform in an inert atmosphere to form the silica-based substrate.
    Type: Application
    Filed: May 31, 2019
    Publication date: July 15, 2021
    Inventors: Yunfeng Gu, Nicolas LeBlond, Ming-Jun Li, Jeffery Scott Stone, Haitao Zhang
  • Publication number: 20210214265
    Abstract: According to embodiments, a method of making a micro structured glass article 100 includes bundling M bare optical fibers in a fiber bundle, wherein M is an integer greater than 100. Thereafter, the fiber bundle may be inserted in a cavity of a soot preform. The soot preform may have a density of less than or equal to 1.5 g/cm3 and comprise silica-based glass soot. The soot preform and inserted fiber bundle may then be consolidated to form a microstructured glass article preform. The micro structured glass article preform may then be drawn into the microstructured glass article 100 comprising M core elements 102 embedded in a cladding matrix 104.
    Type: Application
    Filed: May 31, 2019
    Publication date: July 15, 2021
    Inventors: Ming-Jun Li, Jeffery Scott Stone
  • Publication number: 20210214266
    Abstract: Disclosed herein are methods for forming an optical fiber preform using organic silica and germania precursors. The method includes depositing soot composed of germanium dioxide and silica on a substrate, removing the substrate, conducting a dehydration step and one or more heating steps under an oxygen-containing atmosphere to form the preform. Also disclosed are optical fibers drawn from the preforms produced herein.
    Type: Application
    Filed: January 11, 2021
    Publication date: July 15, 2021
    Inventors: Curtis Robert Fekety, Richard Michael Fiacco, Ming-Jun Li, Craig Daniel Nie, Jeffery Scott Stone, Pushkar Tandon
  • Publication number: 20210208332
    Abstract: A method of manufacturing a multimode optical fiber includes specifying a peak wavelength ?P for the multimode optical fiber. The peak wavelength ?P corresponds to a wavelength at which the multimode optical fiber has a maximum bandwidth. The multimode optical fiber comprises a core and a cladding surrounding and directly adjacent to the core. The core has a radius r1 and a maximum relative refractive index ?1,MAX>0. The cladding comprises a depressed-index region having a minimum relative refractive index ?3,MIN<0 and a volume v. A draw tension T for the multimode optical fiber is selected based on a correlation relating peak wavelength ?P to draw tension T, the correlation comprising a correlation constant. The correlation constant K is a function of at least one of ?1,MAX, r1, v, ?3,MIN, and ?P. The multimode optical fiber is drawn from a preform at the draw tension T.
    Type: Application
    Filed: December 14, 2020
    Publication date: July 8, 2021
    Inventors: Xin Chen, Ming-Jun Li, Simit Mayank Patel
  • Publication number: 20210181408
    Abstract: A multicore optical fiber includes a first core, a second core, and a common cladding. The first core includes silica and greater than 3 wt % chlorine, a first core centerline, a relative refractive index ?1MAX, and an outer radius r1. The second core includes silica and greater than 3 wt % chlorine, a second core centerline, a relative refractive index ?2MAX, and an outer radius r2. A spacing between the first core centerline and the second core centerline is at least 28 micrometers and a crosstalk between the first core and the second core is ??30 dB, as measured for a 100 km length of the multicore optical fiber operating at a wavelength of 1550 nm.
    Type: Application
    Filed: December 4, 2020
    Publication date: June 17, 2021
    Inventors: Scott Robertson Bickham, Ming-Jun Li, Snigdharaj Kumar Mishra, Pushkar Tandon
  • Patent number: 11036000
    Abstract: The present disclosure provides optical fibers with an impact-resistant coating system. The fibers feature low attenuation. The coating system includes a primary coating and a secondary coating. The primary coating and secondary coating have reduced thickness to provide low-diameter fibers without sacrificing protection. The primary coating has high tear strength and is resistant to damage caused by mechanical force. The secondary coating has high puncture resistance. The outer diameter of the optical fiber is less than or equal to 190 ?m.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: June 15, 2021
    Assignee: Corning Incorporated
    Inventors: Scott Robertson Bickham, Ming-Jun Li, Pushkar Tandon, Ruchi Tandon
  • Publication number: 20210165178
    Abstract: A rollable optical fiber ribbon utilizing low attenuation, bend insensitive fibers and cables incorporating such rollable ribbons are provided. The optical fibers are supported by a ribbon body, and the ribbon body is formed from a flexible material such that the optical fibers are reversibly movable from an unrolled position to a rolled position. The optical fibers have a large mode filed diameter, such as?9 microns at 1310 nm facilitating low attenuation splicing/connectorization. The optical fibers are also highly bend insensitive, such as having a macrobend loss of?0.5 dB/turn at 1550 nm for a mandrel diameter of 15 mm.
    Type: Application
    Filed: February 10, 2021
    Publication date: June 3, 2021
    Inventors: Dana Craig Bookbinder, Ming-Jun Li, Pushkar Tandon
  • Patent number: 11022750
    Abstract: The wideband multimode co-doped optical fiber has a silica core co-doped with GeO2 and Al2O3. The GeO2 concentration is maximum at the fiber centerline and monotonically decreases radially out to the core radius. The Al2O3 concentration is minimum at the centerline and monotonically increases radially out to maximum concentration at the core radius. The cladding has an inner cladding region of relative refractive index ?2, an intermediate cladding region having a relative refractive index ?3, and an outer cladding region having a relative refractive index ?4, wherein ?3<?2, ?4. The optical fiber has a bandwidth BW?5 GHz·km with a peak wavelength ?P within a wavelength range of 800 nm to 1200 nm and over a wavelength band ?? of at least 100 nm.
    Type: Grant
    Filed: September 5, 2019
    Date of Patent: June 1, 2021
    Assignee: Corning Incorporated
    Inventors: Dana Craig Bookbinder, Ming-Jun Li, Pushkar Tandon