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).

  • HIGH-DENSITY OPTICAL FIBER RIBBON INTERCONNECT AND METHOD OF MAKING
    Publication number: 20200192040
    Abstract: A fiber ribbon interconnect may include a fiber ribbon, a first optical connector at a first end of the fiber ribbon, and a second optical connector at a second end of the fiber ribbon. The fiber ribbon includes two or more cladding-strengthened glass optical fibers each having an outer surface. The fiber ribbon also includes a common protective coating that surrounds the outer surfaces of the two or more cladding-strengthened glass optical fibers.
    Type: Application
    Filed: November 20, 2019
    Publication date: June 18, 2020
    Inventors: Ming-Jun Li, Qi Wu
  • HIGH-DENSITY OPTICAL FIBER RIBBON WITH CLADDING-STRENGTHENED GLASS OPTICAL FIBERS IN A COMMON PROTECTIVE COATING AND FIBER RIBBON INTERCONNECTS EMPLOYING SAME
    Publication number: 20200192023
    Abstract: A high-density optical fiber ribbon is formed by two or more cladding-strengthened glass optical fibers each having an outer surface and that do not individually include a protective polymer coating. A common protective coating substantially surrounds the outer surfaces of the two or more cladding-strengthened glass optical fibers so that the common protective coating is common to the two or more cladding-strengthened glass optical fibers. A fiber ribbon cable is formed by adding a cover assembly to the fiber ribbon. A fiber ribbon interconnect is formed adding one or more optical connectors to the fiber ribbon or fiber ribbon cable. Optical data transmission systems that employ the fiber ribbon to optically connect to a photonic device are also disclosed. Methods of forming the cladding-strengthened glass optical fibers and the high-density optical fiber ribbons are also disclosed.
    Type: Application
    Filed: November 15, 2019
    Publication date: June 18, 2020
    Inventors: Philip Simon Brown, Matthew Ryan Drake, Richard Michael Fiacco, Mandakini Kanungo, Ming-Jun Li, Jeffery Scott Stone, Qi Wu, Haitao Zhang
  • GLASS-BASED TERAHERTZ OPTICAL WAVEGUIDES AND METHODS OF FORMING SAME
    Publication number: 20200174180
    Abstract: The glass-based THz optical waveguides (10) disclosed herein are used to guide optical signals having a THz frequency in the range from 0.1 THz to (10) THz and include a core (20) surrounded by a cladding (30). The core has a diameter D1 in the range from (30) ?m to 10 mm and is made of fused silica glass having a refractive index n1. The cladding is made of either a polymer or a glass or glass soot and has a refractive index n2<n1 and an outer diameter D2 in the range from 100 ?m to 12 mm. The THz optical waveguides can be formed using processes that are extensions of either fiber, ceramic and soot-based technologies. In an example, the THz waveguides have a dielectric loss Df<0.005 at 100 GHz.
    Type: Application
    Filed: August 20, 2018
    Publication date: June 4, 2020
    Inventors: Ming-Jun Li, Gary Richard Trott
  • Rayleigh scattering based distributed fiber sensors with optimized scattering coefficients
    Patent number: 10663326
    Abstract: A fiber sensor includes an optical fiber configured for operation at a wavelength from about 800 nm to about 1600 nm. The optical fiber includes a cladding that is defined by a fiber outer diameter and a core that is surrounded by the cladding. The core of the optical fiber has a Rayleigh scattering coefficient, ?s, that is controlled by controlling a concentration of one or more dopants in the core. The Rayleigh scattering coefficient is tuned to be within a predetermined range of an optimum Rayleigh scattering coefficient for a given total length, L, of the optical fiber. The predetermined range is from about 70% of the optimum ?s to about 130% of the optimum ?s.
    Type: Grant
    Filed: July 27, 2018
    Date of Patent: May 26, 2020
    Assignee: Corning Incorporated
    Inventors: Anthony Artuso, Valery A Kozlov, Ming-Jun Li
  • Integrated fiber-ferrule, fiber optic assembly incorporating same, and fabrication method
    Patent number: 10663671
    Abstract: An integrated fiber-ferrule useable as an optical coupling element includes a core directly contacting a cladding layer that has a lower index of refraction than that of the core, without an intervening adhesive. The cladding layer outer diameter is at least 100 times greater than that of the core, and matches an outer diameter of a standard ferrule. The integrated fiber-ferrule may be produced by drawing a glass preform into a cane, cutting the cane into sections, and shaping end faces of the cut sections (e.g., using a laser). To form a fiber optic assembly, a front end of an optical fiber core may be fusion spliced to a rear end of the core of the integrated fiber-ferrule. Use of an integrated fiber-ferrule permits reduction of core to fiber eccentricity, and reduction of connector insertion losses.
    Type: Grant
    Filed: September 27, 2018
    Date of Patent: May 26, 2020
    Assignee: Corning Research & Development Corporation
    Inventors: Ming-Jun Li, Qi Wu
  • Laminated glass articles and process for making same
    Patent number: 10661533
    Abstract: A laminated glass article includes at least a first layer, a second layer in direct contact with the first layer, and an optical property difference between the first layer and the second layer. The optical property difference includes at least one of: (a) a transmission profile difference between a transmission profile of the first and second layers in a wavelength range from 200 nm to 2500 nm; or (b) a light-polarizing difference, whereby the second layer is light-polarizing with respect to electromagnetic irradiation in the wavelength range from 200 nm to 2500 nm; or (c) a refractive index difference between refractive indices of the first and second layers of at least 0.005, wherein one layer includes a base glass composition and the other layer includes the base glass composition and a dopant in an amount sufficient to cause the refractive index difference.
    Type: Grant
    Filed: November 10, 2014
    Date of Patent: May 26, 2020
    Assignee: Corning Incorporated
    Inventors: Olus Naili Boratav, Ming-Jun Li, Piotr Janusz Wesolowski
  • LOW BEND LOSS OPTICAL FIBER WITH STEP INDEX CORE
    Publication number: 20200158945
    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 22 m 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: Application
    Filed: November 16, 2018
    Publication date: May 21, 2020
    Inventors: Scott Robertson Bickham, Dana Craig Bookbinder, Ming-Jun Li, Snigdharaj Kumar Mishra, Pushkar Tandon
  • LOW BEND LOSS OPTICAL FIBER WITH A CHLORINE DOPED CORE AND OFFSET TRENCH
    Publication number: 20200150336
    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: Application
    Filed: January 14, 2020
    Publication date: May 14, 2020
    Inventors: Dana Craig Bookbinder, Ming-Jun Li, Snigdharaj Kumar Mishra, Pushkar Tandon
  • Rollable optical fiber ribbon with low attenuation, large mode field diameter optical fiber and cable
    Patent number: 10649163
    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: Grant
    Filed: August 6, 2018
    Date of Patent: May 12, 2020
    Assignee: CORNING RESEARCH & DEVELOPMENT CORPORATION
    Inventors: Dana Craig Bookbinder, Ming-Jun Li, Pushkar Tandon
  • METHODS OF FORMING OPTICAL FIBERS HAVING AN EXPANDED CORE FOR EVANESCENT OPTICAL COUPLING
    Publication number: 20200132936
    Abstract: The methods disclosed herein include forming an expanded core in an optical fiber with a glass core having a core dopant and a core outer surface, and a glass cladding immediately surrounding the core and having a flat glass-portion surface closest to the core outer surface at a first core spacing S1. The methods include applying heat to a section of the optical fiber to cause the glass core to expand toward the flat glass-portion surface due to thermal diffusion of the core dopant. The methods also include terminating the application of heat to define the expanded core in the heated section of the optical fiber. The expanded core defines an evanescent coupling region having a second core spacing 0?S2<S1 and an adiabatic transition region between the core and the evanescent coupling region of the expanded core.
    Type: Application
    Filed: October 31, 2018
    Publication date: April 30, 2020
    Inventors: Alan Frank Evans, Davide Domenico Fortusini, Ming-Jun Li, Aramais Robert Zakharian
  • Low attenuation optical fiber cable with small sized active particles
    Patent number: 10620393
    Abstract: A low attenuation optical cable is provided. The cable includes an outer cable jacket and at least one buffer tube surrounded by the cable jacket. The cable includes a plural number of optical fibers located within the channel of the at least one buffer tube. The cable includes small sized active particles located within the buffer tube, and an average maximum outer dimension of the active particles within the buffer tube is ?50 microns. The small sized active particles reduce microbending-based attenuation otherwise seen with larger sized active particles, particularly within densely packed buffer tubes.
    Type: Grant
    Filed: May 30, 2019
    Date of Patent: April 14, 2020
    Assignee: Corning Optical Communications LLC
    Inventors: Dana Craig Bookbinder, Anne Germaine Bringuier, Donald Kennedy Hall, Inna Igorevna Kouzmina, Ming-Jun Li, David Alan Seddon, Pushkar Tandon, Ruchi Tandon
  • WIDEBAND MULTIMODE CO-DOPED OPTICAL FIBER EMPLOYING GeO2 AND Al2O3 DOPANTS
    Publication number: 20200088935
    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: September 5, 2019
    Publication date: March 19, 2020
    Inventors: Dana Craig Bookbinder, Ming-Jun Li, Pushkar Tandon
  • Two-core optical fibers for distributed fiber sensors and systems
    Patent number: 10591666
    Abstract: According to one embodiment two-core optical fiber is provided for use in Brillouin distributed fiber sensor applications and systems. The two-core fiber includes a first and second core. Each core is configured to exhibit a Brillouin frequency shift greater than 30 Mhz relative to the other core. Further, each core possesses temperature and strain coefficients that differ from the other core. The cores can be configured to produce Brillouin frequency shift levels of at least 30 Mhz relative to one another. These differences in shift levels may be affected by adjustment of the material compositions, doping concentrations and/or refractive index profiles of each of the cores. These optical fibers may also be used in BOTDR- and BOTDA-based sensor systems and arrangements.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: March 17, 2020
    Assignee: Corning Incorporated
    Inventors: Brett Jason Hoover, Ming-Jun Li, Shenping Li
  • Low bend loss optical fiber with a chlorine doped core and offset trench
    Patent number: 10591668
    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 ?1 max% 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 ?2 min such that ?2 min<?1 max, 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 ?3 min such that ?3 min<?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 ?3 min such that ?3 min<?2.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: March 17, 2020
    Assignee: Corning Incorporated
    Inventors: Dana Craig Bookbinder, Ming-Jun Li, Snigdharaj Kumar Mishra, Pushkar Tandon
  • Low loss optical fiber with core codoped with two or more halogens
    Patent number: 10571628
    Abstract: A co-doped optical fiber is provided having an attenuation of less than about 0.17 dB/km at a wavelength of 1550 nm. The fiber includes a core in the fiber having a graded refractive index profile with an alpha of greater than 5. The fiber also includes a cladding in the fiber that surrounds the core addition, the core includes silica that is co-doped with two or more halogens.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: February 25, 2020
    Assignee: Corning Incorporated
    Inventors: Dana Craig Bookbinder, Steven Bruce Dawes, Ming-Jun Li, Pushkar Tandon
  • Waveguide-based touch system employing interference effects
    Patent number: 10572071
    Abstract: A touch system that employs interference effects is disclosed. The touch system includes first and second waveguides that have first and second optical paths that define an optical path difference. The first and second waveguides are configured so that a touch event deforms at least one of the waveguides in a manner that causes the optical path difference to change. The change in the optical path difference is detected by combining the light traveling in the two waveguides to form interfered light. The interfered light is processed to determine the occurrence of a touch event. The time-evolution of the deformation at the touch-event location can also be determined by measuring the interfered light over the duration of the touch event.
    Type: Grant
    Filed: March 9, 2018
    Date of Patent: February 25, 2020
    Assignee: CORNING INCORPORATED
    Inventors: Ming-Jun Li, Daniel Aloysius Nolan, Wendell Porter Weeks
  • Low bend loss optical fiber with graded index core
    Patent number: 10564349
    Abstract: A single mode optical fiber, comprising: (i) a silica based core having a graded refractive index profile with an alpha of less than 5, a relative refractive index ?1max, and an outer radius r1, wherein 10 microns>r1?6.5 microns, the core 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 has MFD at 1310 nm>than 9 microns, a zero dispersion wavelength <1306 nm; a 22 m cable cutoff wavelength <1260nm; and a bend loss <0.005 dB/turn when the fiber is bent around a 30 mm mandrel; and <0.5dB/turn when the fiber is bent around a 20 mm mandrel.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: February 18, 2020
    Assignee: CORNING INCORPORATED
    Inventors: Scott Robertson Bickham, Dana Craig Bookbinder, Ming-Jun Li, Snigdharaj Kumar Mishra, Pushkar Tandon
  • MULTIMODE OPTICAL TRANSMISSION SYSTEM EMPLOYING MODAL-CONDITIONING FIBER
    Publication number: 20200036444
    Abstract: A multimode optical fiber transmission system that employs an optical fiber with at least one modal-conditioning fiber is disclosed. The system includes a single-mode transmitter that generates modulated light having a wavelength between 800 nm and 1600 nm; an optical receiver configured to receive and detect the modulated light; a multimode optical fiber that defines an optical path between the single-mode transmitter and the optical receiver, the multimode optical fiber having a core with a diameter D40 and a refractive index profile configured to optimally transmit light at a nominal wavelength of 850 nm; and at least one modal-conditioning fiber operably disposed in the optical path to perform at least one of modal filtering and modal converting of the optical modulated light.
    Type: Application
    Filed: October 7, 2019
    Publication date: January 30, 2020
    Inventors: Xin Chen, John Douglas Coleman, Kangmei Li, Ming-Jun Li, Jie Liu, Qi Wu
  • Polymer clad fiber for evanescent coupling
    Patent number: 10545290
    Abstract: A fiber to waveguide coupler is provided that includes an optical fiber having a core and a cladding. The cladding includes an inner cladding and an outer cladding with a polymer. At least one of the core and inner cladding defines a substantially flat surface parallel with an axis of the optical fiber. The optical fiber defines a stripped portion substantially free of outer cladding configured to expose the at least one substantially flat surface of the core or inner cladding. A waveguide is configured to be evanescently coupled with the exposed at least one substantially flat surface of the core or inner cladding.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: January 28, 2020
    Assignee: Corning Incorporated
    Inventors: Kevin Wallace Bennett, Alan Frank Evans, Ming-Jun Li, Aramais Robert Zakharian
  • QUANTUM COMMUNICATION SYSTEMS HAVING DISPERSION COMPENSATING OPTICAL FIBER LINKS
    Publication number: 20200007242
    Abstract: A quantum communications system includes a quantum key generation system having a photonic quantum bit generator, a dispersion compensating optical fiber link, and a photon detector unit and a communications network having a signal generator, a signal channel, and a signal receiver. The dispersion compensating optical fiber link extends between and optically couples the photonic quantum bit generator and the photon detector unit. Further, the dispersion compensating optical fiber link is structurally configured to induce dispersion at an absolute dispersion rate of about 9 ps/(nm)km or less and induce attenuation at an attenuation rate of about 0.18 dB/Km or less such that the quantum key bit information of a plurality of photons output by the one or more photonic quantum bit generators is receivable at the photon detector unit at a bit rate of at least about 10 Gbit/sec.
    Type: Application
    Filed: August 30, 2019
    Publication date: January 2, 2020
    Inventors: Ming-Jun Li, Daniel Aloysius Nolan