Optical Fiber Waveguide With Cladding Patents (Class 385/123)
  • Patent number: 11105967
    Abstract: An illumination system includes a light source, and an optical fiber having opposed first and second end faces, a core, a cladding surrounding the core, an outer surface, and a plurality of nano-sized structures configured to scatter light traveling within the optic fibers towards the outer surface. The light source has an effective numerical aperture NAO, the optical fiber has a numerical aperture NALDF which is more than the effective numerical aperture NAO of the light source. The light source is optically coupled to the first end of the optical fiber such that a propagation pathway of light outputted by the light source forms an incident angle ?i, with respect to the first end face, that is non-orthogonal to the first end face and within approximately 5° of sin?1 NALDF?sin?1 NAO.
    Type: Grant
    Filed: April 10, 2018
    Date of Patent: August 31, 2021
    Assignee: Corning Incorporated
    Inventor: Stephan Lvovich Logunov
  • Patent number: 11099322
    Abstract: An optical fiber according to an embodiment includes: a core; an inner cladding surrounding the core and having a refractive index smaller than a refractive index of the core; an outer cladding surrounding the inner cladding and having a smaller refractive index than the refractive index of the core and having a refractive index greater than the refractive index of the inner cladding, in which a ratio of a caustic radius to a MAC-value (caustic radius/MAC-value) at a bending radius of 10 mm at a wavelength of 1625 nm is 2.70 ?m or more.
    Type: Grant
    Filed: August 27, 2020
    Date of Patent: August 24, 2021
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Masato Suzuki, Yuki Kawaguchi, Yoshinori Yamamoto, Takemi Hasegawa
  • Patent number: 11079537
    Abstract: An optical fiber has a core to which chlorine is added and a clad to which fluorine is added, chlorine of 9000 to 13000 ppm is added to the core, a relative refractive index difference ?1 of the core to a pure silica glass is 0.09 to 0.13%, a relative refractive index difference ?2 of the clad to a pure silica glass is ?0.36 to ?0.17%, a difference (?1-?2) between the relative refractive index difference ?1 of the core and the relative refractive index difference ?2 of the clad is larger than or equal to 0.30%, a mode field diameter at wavelength 1.31 ?m is 8.8 to 9.6 ?m, and a stress difference occurring at an interface between the core and the clad is lower than or equal to 60 MPa.
    Type: Grant
    Filed: September 5, 2019
    Date of Patent: August 3, 2021
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Ryo Miyabe, Keiichi Aiso
  • Patent number: 11076491
    Abstract: An integrated electro-optical circuit board comprises a first flexible substrate having a top side and a bottom side, at least one first optical circuit on the bottom side of the first flexible substrate connected to the top surface through a filled via, at least one first metal trace on the top side of the first flexible substrate, an optical adhesive layer connecting the bottom side of the first flexible substrate to a top side of a second flexible substrate, and at least one second metal trace on a bottom side of the second flexible substrate connected by a filled via through the second flexible substrate, the optical adhesive layer, and the first flexible substrate to the at least one first metal trace.
    Type: Grant
    Filed: October 16, 2019
    Date of Patent: July 27, 2021
    Assignee: Compass Technology Company Limited
    Inventors: Kelvin Po Leung Pun, Chee Wah Cheung, Jason Rotanson
  • Patent number: 11071933
    Abstract: An antibacterial mask that includes a filter portion having a first principal surface and a second principal surface opposite the first principal surface, the filter portion including a plurality of first piezoelectric yarns that generate at least a first charge by stretching.
    Type: Grant
    Filed: May 27, 2020
    Date of Patent: July 27, 2021
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Takafumi Inoue, Kenichiro Takumi, Daiji Tamakura, Masamichi Ando
  • 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
  • Patent number: 11047799
    Abstract: A lighting device for total-internal-reflection fluorescence microscopy includes a substrate that is transparent to light, having a refractive index higher than that of water; a light-emitting device arranged in the interior of the substrate, suitable for emitting light radiation in the direction of a surface of the substrate, the light-emitting device being arranged such that at least one portion of the radiation reaches the surface with an angle of incidence larger than or equal to a critical angle of total internal reflection for an interface between the substrate and water; and at least one opaque mask, arranged in the interior or on the surface of the substrate so as to intercept a portion of the radiation that, in the absence of the mask, would reach the surface with an angle of incidence smaller than the critical angle. A lighting device to total-internal-reflection fluorescence microscopy is provided.
    Type: Grant
    Filed: May 23, 2017
    Date of Patent: June 29, 2021
    Assignee: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Alejandro Giacomotti, Maia Brunstein, Andrea Cattoni, Sophie Bouchoule, Benjamin Damilano, Denis Lefebvre
  • 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
  • Patent number: 11022824
    Abstract: A silicon based electro-optically active device and method of production thereof. The device comprising: a silicon-on-insulator (SOI) layer; an electro-optically active stack, disposed on top of the SOI layer: a first epitaxially grown structure comprising a first passive waveguide and a second epitaxially grown structure comprising a second passive waveguide, the first and second passive waveguides being disposed adjacent to respective sides of the electro-optically active stack, wherein the first and second passive waveguides are configured to edge couple light from the first passive waveguide into the electro-optically active stack and from the electro-optically active stack into the second passive waveguide; and an evanescent coupling structure, for evanescently coupling light between the SOI layer and the first and second passive waveguides.
    Type: Grant
    Filed: November 23, 2017
    Date of Patent: June 1, 2021
    Assignee: Rockley Photonics Limited
    Inventors: Guomin Yu, Aaron Zilkie
  • Patent number: 11022889
    Abstract: Methods for manufacturing a semiconductor structure are provided. A substrate is provided. A first lithography is performed according to a first layer mask, to form a plurality of first photonic crystals with a first pitch on a first area of a layer above the substrate. A second lithography is performed according to a second layer mask, to form a plurality of second photonic crystals with a second pitch on a second area of the layer. A light is provided to illuminate the first and second photonic crystals. Light reflected by the first and second photonic crystals or transmitted through the first and second photonic crystals is received. The received light is analyzed to detect overlay-shift between the first photonic crystals corresponding to the first layer mask and the second photonic crystals corresponding to the second layer mask.
    Type: Grant
    Filed: August 10, 2018
    Date of Patent: June 1, 2021
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.
    Inventors: Yu-Ching Lee, Yu-Piao Fang
  • Patent number: 11015095
    Abstract: The present invention relates to a photo-curable adhesive composition comprising a (meth)acrylate capped aliphatic polyurethane having an average number of ethylenically unsaturated groups less than 1, a mono-functional (meth)acrylate monomer or oligomer and a photoinitiator. The adhesive composition can be used in a method of bonding a substrate to a liquid crystal display. The adhesive composition according to the present invention has improved side curing depth.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: May 25, 2021
    Assignees: HENKEL AG & CO. KGAA, HENKEL IP & HOLDING GMBH
    Inventors: Chao Hu, Jiangbo Ouyang, Junwei Yang
  • Patent number: 11008245
    Abstract: An optical fiber production method includes: drawing an optical fiber preform in a drawing furnace; and cooling the optical fiber. The optical fiber is passed through a plurality of annealing furnaces while the optical fiber is cooled. While the optical fiber is cooled, temperatures of the annealing furnaces are set such that the temperature difference is within a range between and including an upper limit and a lower limit of a temperature difference between a temperature of the optical fiber and a fictive temperature of glass constituting a core of the optical fiber at which an increase of a transmission loss of the optical fiber when the fictive temperature of the glass is decreased is less than 0.001 dB/km.
    Type: Grant
    Filed: November 27, 2019
    Date of Patent: May 18, 2021
    Assignee: Fujikura Ltd.
    Inventors: Takayuki Kitamura, Akihito Imase
  • Patent number: 10989864
    Abstract: The optical fiber has an effective area that is greater than or equal to 110 ?m2 and less than or equal to 180 ?m2 at a wavelength of 1550 nm and a cable cut-off wavelength of less than or equal to 1530 nm. An average value of a glass outer diameter in a longitudinal direction is 125±0.5 ?m. When ? is a standard deviation of the glass outer diameter in the longitudinal direction, 3? is greater than or equal to 0.1 ?m and less than or equal to 0.5 ?m.
    Type: Grant
    Filed: July 2, 2020
    Date of Patent: April 27, 2021
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Yuki Kawaguchi, Yoshiaki Tamura, Hirotaka Sakuma
  • Patent number: 10969542
    Abstract: A system and method for providing a radiation source. In one arrangement, the radiation source includes an optical fiber that is hollow, and has an axial direction, a gas that fills the hollow of the optical fiber, and a plurality of temperature setting devices disposed at respective positions along the axial direction of the optical fiber, wherein the temperature setting devices are configured to control the temperature of the gas to locally control the density of the gas.
    Type: Grant
    Filed: July 10, 2020
    Date of Patent: April 6, 2021
    Assignee: ASML Netherlands B.V.
    Inventors: Hendrik Sabert, Patrick Sebastian Uebel
  • Patent number: 10962719
    Abstract: Using laser patterning for an optical assembly, optical features are written into photonic elements at the end of a manufacturing sequence in order to prevent errors and damages to the optical features. The optical assembly is manufactured by affixing a photonic element to a substrate which includes one or more optical features and mapping one or more optical features for the photonic element. The optical features are then written into the fixed photonic element using laser patterning and the optical assembly is completed by connecting components, such as optical fibers, to the photonic element.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: March 30, 2021
    Assignee: Cisco Technology, Inc.
    Inventors: Sandeep Razdan, Ashley J. Maker, Jock T. Bovington, Matthew J. Traverso
  • Patent number: 10962709
    Abstract: An optical fiber according to an embodiment includes a core having a single-peaked and graded refractive index profile, an inner cladding surrounding the core, and an outer cladding surrounding the inner cladding. The inner and outer claddings have refractive indices lower than the maximum refractive index of the core. A photosensitive region constituted by the core and the inner cladding contains a photosensitive material. The inner cladding has an outer diameter one time or more and two times or less the MFD of an LP01 mode in a 1310-nm wavelength band.
    Type: Grant
    Filed: September 10, 2020
    Date of Patent: March 30, 2021
    Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC OPTIFRONTIER CO., LTD.
    Inventors: Shigehiro Nagano, Masakazu Shigehara, Masayuki Yamazaki
  • Patent number: 10962729
    Abstract: In one embodiment, an air-blown optical fiber unit includes one or more optical fibers, an inner layer substantially completely embedding the one or more optical fibers, and an outer layer radially external to the inner layer. The inner layer has a tensile strength of from 0.1 MPa to 1 MPa, and an elongation at break of from 10% to 80%.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: March 30, 2021
    Assignee: PRYSMIAN S.P.A.
    Inventors: Ian Dewi Lang, Mark Richard Mason, Richard John Pennell, John Andrew Bevis
  • Patent number: 10948654
    Abstract: An optical waveguide sheet according to the present technology includes a core and a cladding. The core is extending in a first direction and including a maximum diameter portion in a plane parallel to a second direction orthogonal to the first direction and a third direction orthogonal to the second direction is maximum, a minimum diameter portion in the plane parallel to the second direction and the third direction is minimum, and a taper portion in which widths of the core in both directions of the second direction and the third direction gradually change in the first direction between the maximum diameter portion and the minimum diameter portion, the core being provided such that the maximum diameter portion and the minimum diameter portion are alternately arranged in the first direction with the taper portion therebetween. The cladding is provided around the core.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: March 16, 2021
    Assignee: SONY CORPORATION
    Inventor: Hiizu Ootorii
  • Patent number: 10941472
    Abstract: Systems and methods for drawing high aspect ratio metallic glass-based materials are provided. Methods of drawing a high aspect ratio metallic glass-based material are premised on stably drawing high aspect ratio metallic glass-based material from a preform metallic glass-based composition, accounting for the relationships between: the desired formation of an amorphous structure that is substantially homogenous along the majority of the length of the drawn high aspect ratio material; the desired final geometry of the drawn high aspect ratio material; the nature of the force that is used to draw the molten metallic glass-based composition; the velocity at which the high aspect ratio material is drawn; the viscosity profile of the material along its length as it is being drawn; and/or the effect of temperature on the metallic glass-based material.
    Type: Grant
    Filed: January 9, 2017
    Date of Patent: March 9, 2021
    Assignee: Metal Morphing Technologies, Inc.
    Inventors: Thomas M. Hodges, John Brooke Delfini
  • Patent number: 10916911
    Abstract: In various embodiments, the beam parameter product and/or beam shape of a laser beam is adjusted by coupling the laser beam into an optical fiber of a fiber bundle and directing the laser beam onto one or more in-coupling locations on the input end of the optical fiber. The beam emitted at the output end of the optical fiber may be utilized to process a workpiece.
    Type: Grant
    Filed: March 12, 2020
    Date of Patent: February 9, 2021
    Assignee: TERADIODE, INC.
    Inventors: Wang-Long Zhou, Bien Chann, Francisco Villarreal-Saucedo, Parviz Tayebati
  • Patent number: 10908363
    Abstract: A method and system for affixing multi-core fiber (MCF) within a ferrule includes a UV light source and a light guide. MCFs are placed into epoxy filled holders, e.g., channels or v-grooves, of a ferrule. A first MCF in a first holder is clocked to orient its cores to a desired position. The light source is activated, and the light from the light guide is launched into an outer layer of the first MCF, like the cladding layer or a dedicated light carrying layer. The light in the outer layer will stay in the outer layer until it reaches the portion of the first MCF in contact with the epoxy, even if the light is launched from the far end of the fiber remote from the holder. At the holder, the light will leak out due to the similarity in the index of refraction. The leaking light will at least partially cure the epoxy to affix the first MCF within the first holder. The process may then be repeated for the remaining MCFs, so that each MCF may be clocked and affixed selectively rather than collectively.
    Type: Grant
    Filed: April 28, 2017
    Date of Patent: February 2, 2021
    Assignee: CommScope, Inc. of North Carolina
    Inventors: Timothy W. Anderson, Jeffrey D. Nielson
  • Patent number: 10895525
    Abstract: An optical-fiber measurement system includes an optical system that generates light and a spatial optical switch that is coupled to the optical system that processes the light generated by the optical system and generates light at a plurality of spatially distributed optical ports. A respective one of a plurality of optical cores at a first end of a multicore optical fiber is positioned to receive light from a respective one of the plurality of spatially distributed optical ports, where the light generated at the plurality of spatially distributed optical ports propagates through the multicore optical fiber. Distal optics is positioned adjacent to a second end of the multicore optical fiber and is positioned to collect light from a sample of interest so that the collected light from the sample of interest is coupled to the plurality of optical cores in the multicore optical fiber.
    Type: Grant
    Filed: March 19, 2017
    Date of Patent: January 19, 2021
    Inventor: Eric Swanson
  • Patent number: 10895706
    Abstract: A method of manufacturing an optical fiber, in which a coating is provided on a bare optical fiber, includes winding the optical fiber around a bobbin such that a strain relaxation coefficient T?/K is less than or equal to 292, and an one-layer strain ?n is greater than or equal to 0.01.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: January 19, 2021
    Assignee: Fujikura Ltd.
    Inventor: Kenji Okada
  • Patent number: 10884105
    Abstract: An optical system is provided which may include an optical body, and a plurality of optical devices carried by the optical body. Furthermore, a plurality of optical waveguides may extend within the optical body between respective optical devices and an imaginary curved surface within the optical body, and an optical element may be coupled to the optical body and be optically aligned with the plurality of optical waveguides. A controller may be configured to selectively operate the plurality of optical devices to generate at least one optical beam.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: January 5, 2021
    Assignee: EAGLE TECHNOLOGY, LLC
    Inventor: Micah H. Jenkins
  • Patent number: 10871611
    Abstract: A few mode optical fiber that includes an optical core and an optical cladding surrounding the optical core. The FMF has a step-index profile. The optical core has a core outer radius R1?7.5 ?m and a core refractive index difference ?n1 such that 14.5×10?3<?n1<24×10?3. The optical cladding comprises: an index ring with: a ring inner radius Rr1 between 12 ?m and 19 ?m; a ring refractive index difference ?nr such that ?n1/?nr is between 2 and 4; a ring volume Vring=??nr(Rr22?Rr12) between 1.8 ?m2 and 4.1 ?m2 where Rr2 is the ring outer radius; an inner cladding between the optical core and the index ring, with an inner cladding inner radius Ri1 and an inner cladding outer radius Ri2, the inner cladding having an inner cladding refractive index difference ?nclad1 between ?1.0×10?3 and 1.0×10?3.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: December 22, 2020
    Assignee: Draka Comteq France
    Inventors: Pierre Sillard, Denis Molin, Marianne Bigot
  • Patent number: 10852474
    Abstract: An object of the present invention is to provide an optical fiber bundle having high adhesive strength at an end, and an endoscope using the optical fiber bundle. Another object of the present invention is to provide a method of producing the optical fiber bundle having high adhesive strength at an end. An embodiment of the present invention provides an optical fiber bundle including a bundle of optical transmission elements, each of which includes a fiber including a core made of a first glass and a cladding made of a second glass and covering an outer periphery of the core, and a covering layer covering the outer periphery of the cladding. The covering layer includes an alkyl group having 1 to 7 carbon atoms and not being fluorine-substituted. The alkyl group is bonded to the cladding via a siloxane bond.
    Type: Grant
    Filed: November 27, 2019
    Date of Patent: December 1, 2020
    Assignee: OLYMPUS CORPORATION
    Inventor: Yuki Ishikawa
  • Patent number: 10837804
    Abstract: An optical fiber sensor includes a first single mode fiber, a second single mode fiber, and a multimode fiber positioned between, and coupled to, the first single mode fiber and the second single mode fiber. The multimode fiber includes a graded-index core with an outer diameter between about 35 ?m and about 45 ?m. A numerical aperture of the core is between about 0.15 and about 0.25. The multimode fiber includes a cladding with an outer diameter between about 70 ?m and about 90 ?m. A coupling strength of an LP01 mode of the first single mode fiber to each of an LP02 mode and an LP03 mode of the multimode fiber is at least about 0.25.
    Type: Grant
    Filed: June 5, 2019
    Date of Patent: November 17, 2020
    Assignee: Corning Incorporated
    Inventor: Scott Robertson Bickham
  • Patent number: 10809458
    Abstract: A splicing structure of optical fibers in which optical fibers are coupled together, the optical fibers each comprising: a coated fiber portion including a glass fiber and a coating layer coating an outer periphery of the glass fiber; and a bare fiber portion where a certain length of the glass fiber is projected from an end face of the coating layer in an extending direction, wherein the glass fiber end faces of the bare fiber portion are fusion coupled together, and an outer periphery of the bare fiber portion is coated by a recoating layer, the recoating layer is a cured product of an ultraviolet light curable resin composition including a urethane (meth)acrylate oligomer and a mold release agent, and a content of the mold release agent is 0.01 to 1.5% by mass based on a total amount of the ultraviolet light curable resin composition.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: October 20, 2020
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Kensaku Shimada, Kazuyuki Sohma
  • Patent number: 10793470
    Abstract: An optical fiber including a glass core, and a polymer cladding formed around the glass core, the polymer cladding containing a mixture of a polymerizable composition and a silane coupling agent, and a fluorine-based ultraviolet curable resin. The mixture contains 5 to 95 parts by weight of the silane coupling agent based on 100 parts by weight of the total weight of the mixture. The fluorine-based ultraviolet curable resin alone has a refractive index in a range of 1.350 to 1.420 after ultraviolet curing. A component originated from the silane coupling agent is concentrated within a range of 20 ?m or less in the polymer cladding from an interface between the glass core and the polymer cladding.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: October 6, 2020
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Takeshi Saito, Kenichi Suyama, Yoshihiro Arashitani
  • Patent number: 10788621
    Abstract: An optical fiber having at least two polymer coatings, the optical fiber comprising: an optical fiber comprising a glass optical core and a glass cladding; a first polymer coating comprising a silicone polymer covering the optical fiber; and a second polymer coating covering the first polymer coating is provided.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: September 29, 2020
    Inventors: Jie Li, Yaowen Li, Michael J Hines, Brian Violette, Lei Huang, David Burgess
  • Patent number: 10761267
    Abstract: The present disclosure relates more to mode mixing optical fibers useful, for example in providing optical fiber laser outputs having a desired beam product parameter and beam profile. In one aspect, the disclosure provides a mode mixing optical fiber for delivering optical radiation having a wavelength, the mode mixing optical fiber having an input end, an output end, a centerline and a refractive index profile, the mode mixing optical fiber comprising: an innermost core, the innermost core having a refractive index profile; and a cladding disposed about the innermost core, wherein the mode mixing optical fiber has at least five modes at the wavelength, and wherein the mode mixing optical fiber is configured to distribute a fraction of the light input at its input end from its lower-order modes to its higher-order modes.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: September 1, 2020
    Assignee: Nufem
    Inventors: Clemence Jollivet, Kevin Farley, Jaroslaw Abramczyk, Michael Conroy, Kanishka Tankala
  • Patent number: 10753582
    Abstract: A portable light source unit for being coupled to an instrument is provided. The unit includes a housing having a port for receiving a light guide end tip of the instrument, a battery and LED mounted within the housing, and a pull tab that extends through the housing and electrically isolates the LED from the battery. Upon removal of the pull tab, an electrical connection is completed between the battery and the LED. The unit also includes driver circuitry for the LED ensuring that a constant level of current is provided to the LED so that the LED produces light of a constant brightness. The driver circuitry also produces a current spike for breaking an inline fuse when a remaining charge of the battery is unable to provide a voltage at the constant level of current above a pre-determined threshold level thereby de-energizing the LED.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: August 25, 2020
    Assignee: Sunoptic Technologies LLC
    Inventors: David T Kennedy, Brandon M Closson
  • Patent number: 10754160
    Abstract: An apparatus for use with a head wearable display includes a curved eyepiece for guiding display light received at an input surface peripherally located from a viewing region and emitting the display light along an eye-ward direction in the viewing region. The curved eyepiece includes an optical combiner, an eye-ward facing surface that is concave, a world facing surface that is convex, and a curved lightguide disposed between the eye-ward facing and world facing surfaces to guide the display light via total internal reflections from the input surface to the viewing region. The optical combiner is disposed within the curved eyepiece at the viewing region to redirect the display light towards the eye-ward direction. The optical combiner includes a pattern of reflective elements separated by interstitial regions. The interstitial regions pass ambient light incident through the world facing surface such that the viewing region is partially see-through.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: August 25, 2020
    Assignee: GOOGLE LLC
    Inventors: Ozan Cakmakci, James C. Dunphy, Oscar A. Martinez
  • Patent number: 10734782
    Abstract: A higher-order-mode (HOM) fiber of a fiber laser has step index and guidance diameter (GD) defining wavelength-dependent dispersion characteristics and effective areas for corresponding HOMS of optical signal propagation. One HOM has anomalous dispersion and effective area defining a first wavelength and first power of a pulse optical signal for conversion to a second wavelength and second power by soliton self-frequency shifting (SSFS). By controlling step index and GD, the dispersion and effective area of a HOM are adjusted to bring the second wavelength into a desired range, enabling applications requiring non-conventional fiber laser wavelengths. HOMS may share a predetermined group index and group velocity at wavelengths established by a Raman gain peak to effect wavelength conversion by interpulse and intermodal Raman scattering, which may occur in a cascaded fashion to yield multicolor lasers with desired wavelengths, pulse energies and pulse widths.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: August 4, 2020
    Assignee: Trustees of Boston University
    Inventors: Siddharth Ramachandran, Lars Rishoj, Jeffrey D. Demas
  • Patent number: 10732440
    Abstract: Disclosed herein are methods, apparatus, and systems for providing an optical beam delivery system, comprising an optical fiber including a first length of fiber comprising a first RIP formed to enable, at least in part, modification of one or more beam characteristics of an optical beam by a perturbation assembly arranged to modify the one or more beam characteristics, the perturbation assembly coupled to the first length of fiber or integral with the first length of fiber, or a combination thereof and a second length of fiber coupled to the first length of fiber and having a second RIP formed to preserve at least a portion of the one or more beam characteristics of the optical beam modified by the perturbation assembly within one or more first confinement regions.
    Type: Grant
    Filed: May 2, 2019
    Date of Patent: August 4, 2020
    Assignee: nLIGHT, Inc.
    Inventors: Dahv A. V. Kliner, Roger Farrow
  • Patent number: 10727365
    Abstract: A method of emitting photons at a desired wavelength, including: providing a material having a first region of high absorption of radiation at a first set of wavelength of radiation, contiguous with a second region of low absorption of radiation at a shorter set of wavelengths, and a third region of high emission at a further shorter set of wavelengths; applying energy to the material at the first region, such that most of an effective black body radiation of said material at a temperature of the material would fall within the second region and be configured to transfer energy to said third region and not overlap with the first region; and emitting energy from the material at the third region, powered by said applying energy.
    Type: Grant
    Filed: July 24, 2013
    Date of Patent: July 28, 2020
    Assignee: Technion Research & Development Foundation Limited
    Inventors: Carmel Rotschild, Assaf Manor
  • Patent number: 10690844
    Abstract: Some embodiments of the disclosure relate to an optical transmission system that operates at a wavelength in the range from 950 nm to 1600 nm and that employs a single-mode optical transmitter and an optical receiver optically coupled to respective ends of a multimode fiber designed for 850 nm multimode operation. The optical transmission system also employs at least one single mode fiber situated within the optical pathway between the optical transmitter and the receiver and coupled to the multimode fiber.
    Type: Grant
    Filed: October 15, 2018
    Date of Patent: June 23, 2020
    Assignee: Corning Incorporated
    Inventors: Xin Chen, Ming-Jun Li
  • Patent number: 10684415
    Abstract: Roughly described, an integrated optical device includes both a PLC chip and an attached SiPh chip. The PLC chip has a PLC waveguide which terminates at an end facet. The SiPh chip has a SiPh waveguide which includes a Bragg grating which diffracts light from the SiPh waveguide toward the PLC chip. The PLC chip also has a turning mirror to reflect light emitted from the Bragg grating onto the end facet of the PLC waveguide. The Bragg grating is designed to direct light emitted from the Bragg grating into the end facet of the PLC waveguide so that after reflecting off the turning mirror the light focuses within one Rayleigh distance of the end facet of the PLC chip.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: June 16, 2020
    Assignee: Broadex Technologies UK Limited
    Inventors: Hindrik Freerk Bulthuis, Lucas Soldano, Ramsey Selim
  • Patent number: 10683981
    Abstract: A light-transmitting element including a main body and a fixing portion. A connection portion is provided between the main body and the fixing portion, so that the main body is spaced apart from the fixing portion by the connection portion. The present utility model also provides a lighting device including the light-transmitting element. According to the light-transmitting element and the lighting device of the present utility model, it can avoid a fixing structure for fixing the light-transmitting element from being observed from outside.
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: June 16, 2020
    Assignee: Valeo Lighting Hubei Technical Center Co. Ltd.
    Inventors: Jihan Wang, Wenbo Lei, Qingchao Zeng
  • Patent number: 10686289
    Abstract: A solid-state laser amplifier includes a core material providing an active gain medium. A cladding material is on the core material that is the same material as the core material that further comprises a broadband absorber material. The cladding material suppresses transverse oscillations in solid-state, single-crystal or ceramic laser amplifiers by employing a native-material, solid-state, index-matched cladding containing an appropriate broadband absorber.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: June 16, 2020
    Assignee: UNIVERSITY OF CENTRAL FLORIDA RESEARCH FOUNDATION
    Inventors: Romain Gaume, Eric Cunningham, Shi Chen
  • 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
  • Patent number: 10646407
    Abstract: A feeding tube position confirmation device 102, operable to confirm the position of a predetermined portion of a medical feeding tube in a predetermined portion of a human or animal body, the position confirmation device comprising an optical waveguide 106 dimensioned to be insertable into the lumen of the feeding tube, the optical waveguide having a sensing distal end 108 comprising a distal end material and a sensing material mixed with the distal end material, the sensing material operable to provide a change in optical properties at the distal end 110 of the optical waveguide dependent on the environment to which the sensing distal end 108 of the waveguide is exposed. The sensing material may comprise a reflective material. Methods of manufacture and use of such devices are also described.
    Type: Grant
    Filed: April 29, 2019
    Date of Patent: May 12, 2020
    Assignee: NGPod Global Limited
    Inventors: David Raymond Small, John Davies
  • Patent number: 10641953
    Abstract: Disclosed are devices and techniques for facilitating transmission of light signals between optical waveguides formed on integrated circuit (IC) devices. In an implementation, one or more first waveguides may be formed in a structure such that at least a portion of the one or more first waveguides are exposed for optical connectivity. The structure may comprise first features to enable the structure to be interlocked with an IC device comprising second features complementary with the first features, so as to align at least a portion of the one or more first waveguides exposed to optically couple with one or more second waveguides formed in the first integrated circuit device.
    Type: Grant
    Filed: October 26, 2018
    Date of Patent: May 5, 2020
    Assignee: Arm Limited
    Inventors: Vinay Vashishtha, Mudit Bhargava, Brian Tracy Cline, Saurabh Pijuskumar Sinha, Gregory Munson Yeric
  • Patent number: 10633791
    Abstract: A steel cable includes steel wires and at least one light wave guide which is surrounded by the steel wires and provided for detecting load-dependent cable strains, and has a glass fiber surrounded by a plastic casing. At least the steel wires closest to the light wave guide are crimped with the light wave guide and permanently pressed against the casing surface thereof, whereby the cross-sectional shape of the casing surface of the light wave guide deviates from an unloaded shape, in particular a circular shape, and the light wave guide is clamped continuously along at least one part of the longitudinal extension thereof, in a slip-free manner between the steel wires closest to same. A method produces a steel cable of this type.
    Type: Grant
    Filed: May 8, 2017
    Date of Patent: April 28, 2020
    Assignee: TEUFELBERGER SEIL GESELLSCHAFT M.B.H.
    Inventors: Robert Traxl, Gunter Kaiser
  • Patent number: 10627558
    Abstract: A light-diffusing optical fiber that provides a symmetric intensity distribution of forward and backward scattered light is described. The fiber includes a secondary coating that contains scattering centers. Control of the thickness of the secondary coating and concentration of scattering centers provides control over the distribution of scattered intensity. More symmetric distributions of scattered light intensity are realized by increasing the thickness of the secondary coating and/or the concentration of scattering centers in the secondary coating. Representative scattering centers include oxide nanoparticles.
    Type: Grant
    Filed: November 22, 2016
    Date of Patent: April 21, 2020
    Assignee: CORNING INCORPORATED
    Inventors: Kevin Wallace Bennett, Trista Nicole Hesch, Stephan Lvovich Logunov, Manuela Ocampo
  • Patent number: 10629812
    Abstract: An electrode includes: a polymer layer including a non-conductive material; a conductive nanomaterial embedded in a top surface of the polymer layer; and a planarization layer on the polymer layer and on the conductive nanomaterial. The planarization layer includes a conductive material and a surfactant.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: April 21, 2020
    Assignees: Samsung Display Co., Ltd., UNIST (Ulsan National Institute of Science and Technology)
    Inventors: Young Chan Kim, Won Sang Park, Hye Yong Chu, Jong Ho Hong, Si-Hoon Kim, Ju-Young Kim, Yun Seok Nam, Myoung Hoon Song
  • Patent number: 10630040
    Abstract: The present disclosure relates more to mode mixing optical fibers useful, for example in providing optical fiber laser outputs having a desired beam product parameter and beam profile. In one aspect, the disclosure provides a mode mixing optical fiber that includes a core having a refractive index profile; and a cladding disposed about the core. The core of the mode mixing optical fiber supports at least two (e.g., at least five) guided modes at the wavelength. The mode mixing optical fiber is configured to substantially distribute optical radiation having the wavelength propagating therein (e.g., input at its input end or generated or amplified within the core) among a plurality of the guided modes (e.g., to distribute a substantial fraction of the optical radiation having the wavelength propagating therein from its lower-order guided modes to its higher-order guided modes).
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: April 21, 2020
    Assignee: Nufern
    Inventors: Clemence Jollivet, Kevin Farley, Jaroslaw Abramczyk, Michael Conroy, Kanishka Tankala, Peyman Ahmadi, Eric Lim
  • Patent number: 10615563
    Abstract: A method of fabricating an acousto-optic waveguide that includes a waveguide cladding surrounding an optical core is disclosed. The method comprises providing a wafer substrate; depositing an initial amount of a first material over an upper surface of the wafer substrate to form a partial cladding layer; depositing a second material over the partial cladding layer to form an optical layer; removing portions of the second material of the optical layer to expose portions of the partial cladding layer and form an optical core comprising the remaining second material; and depositing an additional amount of the first material over the optical core and the exposed portions of the partial cladding layer to form a full cladding layer that surrounds the optical core. A relative concentration of components of the first material is adjusted to provide Brillouin gain spectral position control of the waveguide cladding to tune the acousto-optic waveguide.
    Type: Grant
    Filed: May 3, 2019
    Date of Patent: April 7, 2020
    Assignee: Honeywell International Inc.
    Inventor: Matthew Wade Puckett
  • Patent number: 10605993
    Abstract: The present embodiment achieves effective height reduction of an entire optical connection component constituted by a bent optical fiber and a fiber fixing component. The fiber fixing component includes a first portion and a second portion which constitute the holding portion in a state of being arranged in a manner interposing an installation plane in order to hold one of non-bent sections positioned at both ends of a bent portion in a state where the one of non-bent sections is arranged on the installation plane. Total lengths of the first portion and the second portion are different from each other, and effective height reduction of the entire optical connection component can be achieved by arranging the bent portion in a stepped portion formed by the total length difference.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: March 31, 2020
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Yuuichi Mitose, Tetsuya Nakanishi, Takashi Sasaki, Naoki Matsushita
  • Patent number: 10585237
    Abstract: An apparatus includes a multi-mode optical fiber having a selected plurality of optical propagating modes. The selected plurality may include only a proper subset of or may include all of the optical propagating modes of the multi-mode optical fiber. Each optical propagating mode of the selected plurality has a group velocity that varies over a corresponding range for light in, at least, one of the optical telecommunications C-band, the optical telecommunications L-band, and the optical telecommunications S-band. The ranges corresponding to different ones of the modes of the selected plurality are non-overlapping. The ranges of a group velocity-adjacent pair of the ranges are separated by a nonzero gap of less than about 10,000 meters per second.
    Type: Grant
    Filed: August 14, 2017
    Date of Patent: March 10, 2020
    Assignee: Alcatel Lucent
    Inventors: Rene'-Jean Essiambre, Roland Ryf