Optical Fiber Waveguide With Cladding Patents (Class 385/123)
  • Patent number: 11438071
    Abstract: An optical repeater in a mode-division-multiplexing (MDM) optical transmission system prevents a signal-to-noise ratio (SNR) from deteriorating due to a loss of a mode demultiplexer. The optical repeater in the MDM optical transmission system is configured to include at least one multimode optical amplifier, a mode demultiplexer, a mode multiplexer, and variable optical attenuators. One of the multimode optical amplifiers is disposed on the input side of the mode demultiplexer.
    Type: Grant
    Filed: December 3, 2019
    Date of Patent: September 6, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Hirotaka Ono, Koki Shibahara, Takayuki Mizuno, Yutaka Miyamoto
  • Patent number: 11428865
    Abstract: A hollow core photonic bandgap optical fibre comprises: a cladding comprising capillaries in a hexagonal array and a hollow core formed by excluding a hexagonal group of nineteen capillaries from the centre of the hexagonal array. The core is inflated. A core size ratio is 1.26 or above, defined as a ratio of the core diameter to the cladding diameter normalized to the ratio of the core diameter to the cladding diameter in an undistorted hexagonal array; a first ring ratio is between 0.55 and 2.50, defined as a ratio of the length of radially aligned struts separating the capillaries of the first ring to the length of a strut in an undistorted hexagonal array; and a core node spacing is between 0.60 and 1.90, where defined as a ratio of a strut length around the core of a largest corner capillary and a strut length around the core of a smallest side capillary. The fabrication method comprises four different pressures for the core, corner capillary, side capillary and cladding.
    Type: Grant
    Filed: August 1, 2018
    Date of Patent: August 30, 2022
    Assignee: University of Southampton
    Inventors: Gregory Teofil Jasion, Francesco Poletti, Yong Chen, Eric Rodrigue Numakm Fokoua, Thomas David Bradley
  • Patent number: 11401192
    Abstract: One aspect is a method for producing a hollow porous quartz glass base material. Even when the hollow porous quartz glass base material is produced in large weight and high bulk density, the ease of target extraction is maintained and target extraction is performed stably. The method includes preparing a heat resistant substrate, which has an outer surface on which SiO2 particles are deposited, the outer surface having a surface roughness in which the maximum height Rz is less than 9 ?m and the arithmetic average roughness Ra is less than 1 ?m. The heat resistant substrate is rotated and SiO2 particles are deposited on the outer surface of the heat resistant substrate to form a glass particulate deposit. The heat resistant substrate is extracted from the glass particulate deposit to produce the base material.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: August 2, 2022
    Assignees: Heraeus Deutschland GmbH & Co. KG, Shin-Etsu Quartz Products Co., Ltd.
    Inventors: Kotaro Sumi, Hikari Kuwahara
  • Patent number: 11378738
    Abstract: An optical fiber includes a core with radius r1, a first clad layer with outermost radius r2 adjacent to the core at radial position r1 and covering the outer periphery of the core, a second clad layer with outermost radius r3 adjacent to the first clad layer at radial position r2 and covering the outer periphery of the first clad layer, and a third clad layer adjacent to the second clad layer at radial position r3 and covering the outer periphery of the second clad layer. The refractive index of the first clad layer decreases continuously from the inside to the outside, reaching a maximum value at radial position r1 and a minimum value at radial position r2. The refractive index of the second clad layer increases continuously from the inside to the outside, reaching a minimum value at radial position r2 and a maximum value at radial position r3.
    Type: Grant
    Filed: April 13, 2021
    Date of Patent: July 5, 2022
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Hiroki Kojima, Dai Inoue
  • Patent number: 11378736
    Abstract: A method of forming a metallized mirror coating on a light diffusing optical fiber (110) includes contacting an end face (118) of a second end (114) of a light diffusing optical fiber (110) with a metallized mirror precursor. The light diffusing optical fiber (110) includes a first end (112) opposite the second end (114), a core (120), a polymer cladding (122) surrounding the core (120) and coplanar with the core at the end face (118) of the second end (114), an outer surface (128), and a plurality of scattering structures (125) positioned within the core (120), the polymer cladding (122), or both, that are configured to scatter guided light toward the outer surface (128) of the light diffusing optical fiber (110). The method also includes heating the metallized mirror precursor such that the metallized mirror precursor bonds to the core (120) and the polymer cladding (122) at the end face (118) of the second end (114) thereby forming a metallized mirror coating on the end face (118) of the second end (114).
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: July 5, 2022
    Assignee: Corning Incorporated
    Inventors: Anthony Sebastian Bauco, Carl Edgar Crossland
  • Patent number: 11373112
    Abstract: A method useful for network and spectrum defense which operates to analyze cyber data and spectra while performing real time optimization which is based on the analyzed cyber data or spectrum. The method utilizes quantum computing and reconfigurable qubits with built-in memory to sample a target cyber data or spectrum, search through the sample and determine a desired or required network or spectrum reallocation, and determine optimal values for its order parameters and Hamiltonian and tune the qubits in accordance with the determination. An embodiment may provide for spectrum optimization that minimizes frequency bandwidth, power, and bit error rate. The desired or required network or spectrum reallocation and optimal values order parameters and Hamiltonian may be stored in the built-in memory to facilitate machine learning.
    Type: Grant
    Filed: January 24, 2020
    Date of Patent: June 28, 2022
    Assignee: United States of America as represented by the Secretary of the Navy
    Inventors: Brian A. Higa, Kenneth S. Simonsen, Osama M. Nayfeh
  • Patent number: 11362478
    Abstract: An optical system, apparatus, or method can comprise or implement a seed module to generate and output electromagnetic radiation at a predetermined amplitude and at a predetermined wavelength. The seed module can include at least one non-hollow core optical fiber and at least one hollow core optical fiber. One at least one non-hollow core optical fiber can be optically coupled to one at least one hollow core optical fiber. The non-hollow core optical fiber and the hollow core optical fiber may receive and pass electromagnetic radiation emitted from a laser diode or amplifier.
    Type: Grant
    Filed: December 19, 2019
    Date of Patent: June 14, 2022
    Assignee: Lockheed Martin Corporation
    Inventor: Matthias P. Savage-Leuchs
  • Patent number: 11340397
    Abstract: Provided is a mode controller which includes an optical fiber coupled body and at least one pair of bobbins, and the mode controller is configured so that: the one pair of bobbins includes two bobbins arranged, spaced from one another; the optical fiber coupled body includes a step-index fiber and a graded-index fiber, which are coupled with each other; the step-index fiber and/or the graded-index fiber is/are wound around the at least one pair of bobbins, and twisted to form a helical area(s); light is launched into the step-index fiber, propagates through the step-index fiber, is emitted from the step-index fiber, and is launched into the graded-index fiber; propagation mode of the light is converted to an equilibrium mode distribution during the propagation of the light through the step-index fiber; and the propagation mode of the light launched into the graded-index fiber is converted to a low-order mode.
    Type: Grant
    Filed: August 21, 2020
    Date of Patent: May 24, 2022
    Assignee: Adamant Namiki Precision Jewel Co., Ltd.
    Inventors: Koji Horiguchi, Yasuhiro Hyakutake, Yoshitada Beppu, Tadahisa Iikubo, Tomohiro Kikuta
  • Patent number: 11340467
    Abstract: An optical fiber may include a first core, a second core, and a cladding surrounding the first core and the second core. The second core may be at an off-center location with respect to a center of the optical fiber, or the second core may include an azimuthally nonuniform section at the off-center location. The second core may twist about an axis of the optical fiber along a length of the optical fiber, and the second core being twisted about the axis may cause an optical beam, launched into the second core at a first end of the optical fiber, to be at least partially converted to a rotary optical beam at a second end of the optical fiber.
    Type: Grant
    Filed: April 28, 2020
    Date of Patent: May 24, 2022
    Assignee: Lumentum Operations LLC
    Inventors: Patrick Gregg, Richard D. Faulhaber, Martin H. Muendel, Vincent Petit, James J. Morehead
  • Patent number: 11312650
    Abstract: A system for precoating a preform for drawing optical fiber including a diameter sensor to determine a diameter of pulled optical fiber, a cooling system to cool the optical fiber once it is pulled from a furnace, a coating system to apply a coating to the optical fiber once it has cooled and an ultra-violet lamp to cure the coating.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: April 26, 2022
    Assignee: REDWIRE SPACE, INC.
    Inventors: Jan Clawson, Robert White, Nate Pickslay, Michael Snyder, Geoffrey York Powers, Noah Paul-Gin
  • Patent number: 11316587
    Abstract: A space-division multiplexed optical fiber includes a relatively high refractive index optical core region surrounded by alternating regions of relatively low and relative high refractive index material, forming concentric high index rings around the core. The optical core region supports propagation of light along at least a first radial mode associated with the optical core region and a high index ring region supports propagation of light along at least a second radial mode associated with the high index ring region. The second radial mode is different from the first radial mode.
    Type: Grant
    Filed: September 21, 2020
    Date of Patent: April 26, 2022
    Assignee: COMMSCOPE TECHNOLOGIES LLC
    Inventors: John Charles Chamberlain, Sander Johannes Floris
  • Patent number: 11309677
    Abstract: A multi-clad optical fiber is provided. The fiber includes, concentrically and radially outwards from the center of the optical fiber, a core doped with at least one rare-earth dopant material, a pedestal cladding structure, an inner cladding and an outer cladding. The pedestal cladding structure includes a pedestal layer having a refractive index smaller than a refractive index of the core, and a raised index layer having a refractive index larger than the refractive index of the pedestal layer. The raised index layer has a thickness and a refractive index which preserve the confinement of the core mode in the core and minimize the overlap of one or more pedestal modes with the core.
    Type: Grant
    Filed: January 29, 2021
    Date of Patent: April 19, 2022
    Assignee: INSTITUT NATIONAL D'OPTIQUE
    Inventors: Antoine Proulx, Vincent Roy, Mathieu Boivin, Yves Taillon
  • Patent number: 11310481
    Abstract: An imaging device for converting a first image into a plurality of second images, the imaging device comprising a light receiving unit having a first aperture configured to receive light of the first image, a light reflecting unit configured to reflect the light received by the light receiving unit along a number of paths having a predetermined number of reflections within the light reflecting unit according to a portion of the first aperture from which the light originated, and a light output unit configured to output at least a subset of the paths of light reflected by the light reflecting unit as a plurality of second images, the second images having a focal length associated with the predetermined number of reflections experienced by the corresponding paths of light through the light reflecting unit.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: April 19, 2022
    Assignee: SONY CORPORATION
    Inventors: Paul Springer, Thimo Emmerich, Zoltan Facius
  • Patent number: 11298007
    Abstract: An optical fiber guidewire according to an embodiment of the present disclosure includes at least one optical fiber and a sleeve surrounding the optical fiber. The sleeve includes a functional section, a guiding section and a supporting section that are connected in sequence. An asymmetric structure is provided on the sleeve itself or the surround of the sleeve along the optical fiber. Therefore, the optical fiber guidewire provided in this disclosure has good bending performance and operability, and thus can be easily manipulated, readily enters a body cavity with a larger opening angle, and achieves self-guidance and flexible detection of the optical fiber guidewire in the body cavity, thereby improving the effect of minimally invasive interventional treatment.
    Type: Grant
    Filed: August 9, 2021
    Date of Patent: April 12, 2022
    Inventor: Hua Shang
  • Patent number: 11287572
    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 31, 2020
    Date of Patent: March 29, 2022
    Assignee: Nufern
    Inventors: Clemence Jollivet, Kevin Farley, Jaroslaw Abramczyk, Michael Conroy, Kanishka Tankala
  • Patent number: 11287567
    Abstract: Optical fibers having a large effective area and a low cutoff wavelength are disclosed. Three main embodiments of the optical fiber allow for single-mode operation at wavelengths greater than 980 nm, and have a large effective area with low bend losses and low dispersion at 1310 nm. The large effective area optical fiber is expected to be particularly useful for data center applications due to its ability to efficiently optically couple with VCSELs and photonic integrated devices. Integrated systems and optical communication systems that employ the optical fibers are also disclosed.
    Type: Grant
    Filed: May 22, 2019
    Date of Patent: March 29, 2022
    Assignee: Corning Incorporated
    Inventors: Scott Robertson Bickham, Dana Craig Bookbinder, Ming-Jun Li, Snigdharaj Kumar Mishra, Pushkar Tandon
  • Patent number: 11288941
    Abstract: A detection system for measuring one or more conditions within a predetermined area includes a fiber harness having at least one fiber optic cable for transmitting light, the at least one fiber optic cable defining a node arranged to measure the one or more conditions. A control system is operably coupled to the fiber harness such that scattered light associated with the node is transmitted to the control system, wherein the control system analyzes the scattered light to determine at least one of a presence and magnitude of the one or more conditions at the node. An optical element is operably connected to the fiber harness or control system to alter or define the operational range or sensitivity of the node.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: March 29, 2022
    Assignee: CARRIER CORPORATION
    Inventors: Michael J. Birnkrant, David L. Lincoln, Jennifer M. Alexander, Peter R. Harris
  • Patent number: 11280958
    Abstract: An optical fiber having an effective area that can be easily increased and bending loss characteristics that can be easily improved is provided. The optical fiber includes a glass fiber including a core and a cladding; a first resin coating layer that is in contact with the glass fiber and surrounds the glass fiber; and a second resin coating layer that surrounds the first resin coating layer and has a Young's modulus greater than a Young's modulus of the first resin coating layer. An effective area is greater than or equal to 110 ?m2 and less than or equal to 180 ?m2 at a wavelength of 1550 nm. A cable cut-off wavelength is less than or equal to 1530 nm. A uniformity of thickness of the first resin coating layer is greater than or equal to 60% and less than or equal to 80%.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: March 22, 2022
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Yuki Kawaguchi, Yoshiaki Tamura, Hirotaka Sakuma
  • Patent number: 11275213
    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: Grant
    Filed: October 31, 2018
    Date of Patent: March 15, 2022
    Assignee: Corning Research & Development Corporation
    Inventors: Alan Frank Evans, Davide Domenico Fortusini, Ming-Jun Li, Aramais Robert Zakharian
  • Patent number: 11262501
    Abstract: Optical fiber connections and their applications in downhole assemblies are described herein. The downhole assembly includes a well completion element with an end that couples with a corresponding well completion element. An optical fiber extends along at least a portion of the well completion element and transmits an optical signal using a first mode. The well completion element includes an optical fiber connector that is coupled to the optical fiber. The connector also includes a mode converter that receives the optical signal from the optical fiber and converts the optical signal from the first mode to a second larger mode. This second larger mode may be more robustly communicated to a corresponding optical fiber connector affixed to the corresponding well completion element.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: March 1, 2022
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Irfan Bulu, Francois M. Auzerais, Robert Graham, Mohamed Aly Sadek
  • Patent number: 11243346
    Abstract: An optical-fiber measurement system includes an optical transceiver comprising an optical transmitter and an optical receiver. A multi-core optical fiber has a proximal end with a first optical core coupled to the transceiver and a second optical core coupled to the transceiver, and a distal end with the first optical core coupled to a sample path that is configured to convey light collected from a sample positioned external to the multi-core optical fiber and the second optical core coupled to a reference path such that the sample path and the reference path experience mostly a same disturbance along the multi-core optical fiber. The optical receiver is configured to interferometrically detect light from the sample path and light from the reference path.
    Type: Grant
    Filed: September 12, 2020
    Date of Patent: February 8, 2022
    Inventor: Eric Swanson
  • Patent number: 11245241
    Abstract: An optical fiber for a fiber laser includes a core to which a rare-earth element is added, a first cladding formed around the core; and a second cladding formed around the first cladding, and excitation light is guided from at least one end of the first cladding to excite the rare-earth element to output a laser oscillation light. An addition concentration of the rare-earth element to the core is different in a longitudinal direction of the optical fiber for a fiber laser, and a core diameter and a numerical aperture of the optical fiber for a fiber laser are constant in the longitudinal direction of the optical fiber for a fiber laser.
    Type: Grant
    Filed: October 7, 2019
    Date of Patent: February 8, 2022
    Assignee: FANUC CORPORATION
    Inventors: Hiroshi Takigawa, Tetsuhisa Takazane
  • Patent number: 11243347
    Abstract: Disclosed herein are optical integration technologies, designs, systems and methods directed toward Optical Coherence Tomography (OCT) and other interferometric optical sensor, ranging, and imaging systems wherein such systems, methods and structures employ tunable optical sources, coherent detection and other structures on a single or multichip monolithic integration. In contrast to contemporary, prior-art OCT systems and structures that employ simple, miniature optical bench technology using small optical components positioned on a substrate, systems and methods according to the present disclosure employ one or more photonic integrated circuits (PICs), use swept-source techniques, and employ a widely tunable optical source(s). In another embodiment the system uses an optical photonic phased array.
    Type: Grant
    Filed: September 12, 2020
    Date of Patent: February 8, 2022
    Inventor: Eric Swanson
  • Patent number: 11226506
    Abstract: In some embodiments, the present disclosure relates to a modulator device that includes an input terminal configured to receive impingent light. A first waveguide has a first output region and a first input region that is coupled to the input terminal. A second waveguide is optically coupled to the first waveguide and has second input region and a second output region that is coupled to the input terminal. An output terminal coupled to the first output region of the first waveguide and the second output region of the second waveguide is configured to provide outgoing light that is modulated. A heater structure is configured to provide heat to the first waveguide to induce a temperature difference between the first and second waveguides. A gas-filled isolation structure is proximate to the heater structure and is configured to thermally isolate the second waveguide from the heat provided to the first waveguide.
    Type: Grant
    Filed: March 17, 2020
    Date of Patent: January 18, 2022
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Shih-Wei Lin, Ming Chyi Liu
  • Patent number: 11221670
    Abstract: Disclosed are systems and methods for manufacturing energy relays for energy directing systems and Transverse Anderson Localization. Systems and methods include providing first and second component engineered structures with first and second sets of engineered properties and forming a medium using the first component engineered structure and the second component engineered structure. The forming step includes randomizing a first engineered property in a first orientation of the medium resulting in a first variability of that engineered property in that plane, and the values of the second engineered property allowing for a variation of the first engineered property in a second orientation of the medium, where the variation of the first engineered property in the second orientation is less than the variation of the first engineered property in the first orientation.
    Type: Grant
    Filed: July 17, 2017
    Date of Patent: January 11, 2022
    Assignee: Light Field Lab, Inc.
    Inventors: Jonathan Sean Karafin, Brendan Elwood Bevensee
  • Patent number: 11215752
    Abstract: An electronic device may have a housing with a display. A protective display cover layer for the display may have an image transport layer such as an image transport layer formed from optical fibers. Extruded filaments of binder material may be fused together to form a layer of binder for the image transport layer. Each filament may contain multiple embedded optical fibers. As a result of the extrusion process, the optical fibers may be characterized by increasing lateral deformation at increasing distances from the center of the filament in which the optical fibers are embedded. Tension variations and variations in the orientation angle of the fibers in the image transport layer can be maintained below desired limits to ensure satisfactory optical performance for the image transport layer. The optical fibers and binder may be formed from polymers or other clear materials.
    Type: Grant
    Filed: December 4, 2020
    Date of Patent: January 4, 2022
    Assignee: Apple Inc.
    Inventors: Wei Lin, Di Liu, Chunchia Huang, Nathan K. Gupta, Prabhakar Gulgunje, Shenglin Ye, Shubhaditya Majumdar
  • Patent number: 11209596
    Abstract: The present invention provides a tapered side-polished fiber-optic biosensor (FOBS) and a method for preparing a tapered side-polished fiber (SPF). The biosensor includes a broadband light source, a first single-mode fiber, a tapered SPF, a second single-mode fiber, and a spectrometer. The broadband light source is connected to the tapered SPF through the first single-mode fiber, and the tapered SPF is connected to the spectrometer through the second single-mode fiber. The broadband light source is configured to emit a light wave. The spectrometer is configured to display a spectrum corresponding to a light wave passing through the first single-mode fiber, the tapered SPF, and the second single-mode fiber successively. In the present invention, a fiber side-polishing technology is combined with a fiber tapering technology to construct a tapered SPF, and a spectrum changes by changing a refractive index around a side-polished tapered region, thereby measuring the refractive index.
    Type: Grant
    Filed: June 23, 2020
    Date of Patent: December 28, 2021
    Assignee: NANCHANG HANGKONG UNIVERSITY
    Inventors: Bin Liu, Wei Luo, Qiang Wu, Juan Liu, Shengpeng Wan, Xingdao He
  • Patent number: 11198233
    Abstract: In an example method of forming a waveguide part having a predetermined shape, a photocurable material is dispensed into a space between a first mold portion and a second mold portion opposite the first mold portion. A relative separation between a surface of the first mold portion with respect to a surface of the second mold portion opposing the surface of the first mold portion is adjusted to fill the space between the first and second mold portions. The photocurable material in the space is irradiated with radiation suitable for photocuring the photocurable material to form a cured waveguide film so that different portions of the cured waveguide film have different rigidity. The cured waveguide film is separated from the first and second mold portions. The waveguide part is singulated from the cured waveguide film. The waveguide part corresponds to portions of the cured waveguide film having a higher rigidity than other portions of the cured waveguide film.
    Type: Grant
    Filed: October 16, 2019
    Date of Patent: December 14, 2021
    Assignee: Magic Leap, Inc.
    Inventors: Sharad D. Bhagat, Chieh Chang, Christophe Peroz
  • Patent number: 11201001
    Abstract: An insulated electrically conductive element, including at least one inner electrically conductive element and at least one outer insulating element, and to a method for producing such an insulated electrically conductive element.
    Type: Grant
    Filed: December 4, 2020
    Date of Patent: December 14, 2021
    Assignee: HEW-KABEL GMBH
    Inventor: Ingo Hollas
  • Patent number: 11187830
    Abstract: Provided are: a polarizing plate; a method for manufacturing the polarizing plate; and an optical display device comprising the same, the polarizing plate having an adhesive layer, a barrier layer, a polarizer, and a protective film, which are sequentially stacked, wherein the barrier layer is formed from a barrier layer composition containing an epoxy-based compound and an antimony sulfonium-based initiator.
    Type: Grant
    Filed: January 3, 2018
    Date of Patent: November 30, 2021
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Byung Joo Byun, Young Jong Kim, Do Heon Lee, In Cheon Han
  • Patent number: 11190272
    Abstract: There is provided a method and apparatus for evaluating nonlinear impairment of an optical fiber link. The method includes partitioning a natural span of the optical fiber link into multiple sub-spans, each of the multiple sub-spans determined based on chromatic dispersion (CD) equivalence; The method further includes for each of the multiple sub-spans, acquiring sub-span function parameters and a sub-span input power indicative of input power at a particular sub-span, the sub-span function parameters including noise variance and correlations between the particular sub-span and others of the multiple sub-spans. The method additionally includes determining the nonlinear impairment of the optical fiber link based on the sub-span input power and the sub-span function parameters acquired for each of the multiple sub-spans.
    Type: Grant
    Filed: December 18, 2020
    Date of Patent: November 30, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Zhiping Jiang
  • Patent number: 11175449
    Abstract: An optical fiber may comprise a core doped with one or more active ions to guide signal light from an input end of the optical fiber to an output end of the optical fiber, a cladding surrounding the core to guide pump light from the input end of the optical fiber to the output end of the optical fiber, and one or more inserts formed in the cladding surrounding the core. Each of the one or more inserts may have a geometry (e.g., a cross-sectional size, a helical pitch, and/or the like) that varies along a longitudinal length of the optical fiber, which may cause an absorption of the pump light to be modulated along the longitudinal length of the optical fiber.
    Type: Grant
    Filed: October 18, 2019
    Date of Patent: November 16, 2021
    Assignee: Lumentum Operations LLC
    Inventors: Vincent Petit, Martin H. Muendel
  • Patent number: 11175450
    Abstract: A method of forming an optical fiber, including: exposing a soot core preform to a dopant gas at a pressure of from 1.5 atm to 40 atm, the soot core preform comprising silica, the dopant gas comprising a first halogen doping precursor and a second halogen doping precursor, the first halogen doping precursor doping the soot core preform with a first halogen dopant and the second halogen precursor doping the soot core preform with a second halogen dopant; and sintering the soot core preform to form a halogen-doped closed-pore body, the halogen-doped closed-pore body having a combined concentration of the first halogen dopant and the second halogen dopant of at least 2.0 wt %.
    Type: Grant
    Filed: August 1, 2019
    Date of Patent: November 16, 2021
    Assignee: Corning Incorporated
    Inventors: Dana Craig Bookbinder, Steven Bruce Dawes, Phong Diep, Brian Lee Harper, Pushkar Tandon
  • Patent number: 11169322
    Abstract: An optical fiber having an effective area that can be easily increased and bending loss characteristics that can be easily improved is provided. The optical fiber includes a glass fiber including a core and a cladding; a first resin coating layer that is in contact with the glass fiber and surrounds the glass fiber; and a second resin coating layer that surrounds the first resin coating layer and has a Young's modulus greater than a Young's modulus of the first resin coating layer. An effective area is greater than or equal to 110 ?m2 and less than or equal to 180 ?m2 at a wavelength of 1550 nm. A cable cut-off wavelength is less than or equal to 1530 nm. A uniformity of thickness of the first resin coating layer is greater than or equal to 60% and less than or equal to 80%.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: November 9, 2021
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Yuki Kawaguchi, Yoshiaki Tamura, Hirotaka Sakuma
  • Patent number: 11169323
    Abstract: Polymeric coated optical elements are described herein, which exhibit good optical properties, e.g., low attenuation. Some such coated optical elements comprise an optical element (e.g., an optical fiber) having an outer surface and a thermoplastic polymeric tight buffer coating on at least a portion of the outer surface of the optical element, wherein the polymer-coated optical element exhibits a first attenuation at room temperature of plus or minus about 50% the attenuation of a comparable optical element with no thermoplastic polymeric tight buffer coating thereon, and a second attenuation at room temperature after thermal cycling to a temperature of at least 170° C. that is about 2 times the first attenuation or less.
    Type: Grant
    Filed: October 12, 2016
    Date of Patent: November 9, 2021
    Assignee: Zeus Industrial Products, Inc.
    Inventors: Brian R. Tomblin, Shannon M. Giovannini, Matthew W. Cox, Aaron E. Hydrick
  • Patent number: 11156636
    Abstract: The present disclosure provides a scanning probe, a method and an apparatus for manufacturing the scanning probe. The scanning probe includes a base and a micro-tip disposed on an end of the base, wherein at least a section of the micro-tip comprises a lateral surface with a concavely curved generatrix. In the method, an end of a probe precursor is immersed in a corrosive solution by having a length direction of the probe precursor inclined with a liquid surface of the corrosive solution. The probe precursor is corroded by the corrosive solution while a corrosion current of the corroding is monitored. The probe precursor is moved away from the corrosive solution after a magnitude of the corrosion current has a plunge. The apparatus includes a container containing the corrosive solution, and a driving device configured to move the probe precursor in the container through a fastener.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: October 26, 2021
    Assignee: NATIONAL INSTITUTE OF METROLOGY, CHINA
    Inventors: Zhen-Dong Zhu, Si-Tian Gao, Wei Li
  • Patent number: 11137540
    Abstract: The present disclosure provides an optical fiber (100). The optical fiber (100) includes a core region (102). The core region (102) is defined by a region around central longitudinal axis (112) of the optical fiber (100). In addition, the core region (100) has a first annular region (106). The first annular region (106) is defined from the central longitudinal axis (112) to a first radius from the central longitudinal axis. Moreover, the core region (102) has a second annular region (108). The second annular region (108) is defined from the first radius to a second radius. Further, the core region (102) has a third annular region (110). The third annular region (110) is defined from the second radius to a third radius. Also, the optical fiber (100) includes a cladding (104). The cladding region (104) has a fourth radius.
    Type: Grant
    Filed: July 25, 2019
    Date of Patent: October 5, 2021
    Assignee: STERLITE TECHNOLOGIES LIMITED
    Inventors: Srinivas Reddy Munige, Malleswara Rao Lanke, Radhika Velayudhan, Anand Kumar Pandey
  • Patent number: 11137291
    Abstract: A hair colorant selection and formulation system including one or more of a hair color analyzer operable to determine hair color of a hair sample and match the determined hair color to a color in a color space, a hair color selector operable in combination with a fiber optic hair sample to generate the color selected in a color space in the optical fibers of a fiber optic hair sample, and a hair colorant mixer which operates to mix a hair colorant, which can be individually, or in various combinations, operably coupled to one or more computing devices through one or more server computers via a network which supports a hair colorant selection and hair colorant formulation program accessible by the one or more computing devices.
    Type: Grant
    Filed: March 8, 2021
    Date of Patent: October 5, 2021
    Assignee: Innovative Beauty LLC
    Inventor: Jesse A. Kloberdanz
  • Patent number: 11139632
    Abstract: An optical module comprising a first optical fiber corresponding to an incidence side for laser light a second optical fiber corresponding to an emission side for the laser light; and a connection protecting portion that is provided and located so as to cover a connection site for optically connecting the first optical fiber and the second optical fiber, wherein the second optical fiber has a larger core diameter than the first optical fiber, the connection site is a site where a core portion of the first optical fiber and a core portion of the second optical fiber are connected to each other in a discontinuous shape, and the connection protecting portion is formed of a thermally conductive protective material and/or a photorefractive protective material includes refractive index that is equal to or higher than that of a clad portion of the first optical fiber.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: October 5, 2021
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Koji Kajiwara, Keishi Takaki
  • Patent number: 11125942
    Abstract: An optical waveguide element includes: a cladding portion made of silica-based glass; and a plurality of optical waveguides positioned in the cladding portion and made of silica-based glass in which ZrO2 crystal particles are dispersed. The optical waveguide element is a planar lightwave circuit. The plurality of optical waveguides configure an arrayed waveguide grating element.
    Type: Grant
    Filed: June 26, 2019
    Date of Patent: September 21, 2021
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Yasuyoshi Uchida, Yuuki Taniguchi, Hiroshi Kawashima, Kazutaka Nara, Masanori Takahashi
  • Patent number: 11125948
    Abstract: Hybrid optical integration places very strict manufacturing tolerances and performance requirements upon the multiple elements to exploit passive alignment techniques as well as having additional processing requirements. Alternatively, active alignment and soldering/fixing where feasible is also complex and time consuming with 3, 4, or 6-axis control of each element. However, microelectromechanical (MEMS) systems can sense, control, and activate mechanical processes on the micro scale. Beneficially, therefore the inventors combine silicon MEMS based micro-actuators with silicon CMOS control and drive circuits in order to provide alignment of elements within a silicon optical circuit either with respect to each other or with other optical elements hybridly integrated such as compound semiconductor elements. Such inventive MEMS based circuits may be either maintained as active during deployment or powered off once the alignment has been “locked” through an attachment/retention/latching process.
    Type: Grant
    Filed: October 21, 2019
    Date of Patent: September 21, 2021
    Assignee: Aeponyx Inc.
    Inventors: Francois Menard, Frederic Nabki, Michael Menard, Martin Berard
  • 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: 11126020
    Abstract: A silicon based electro-optically active device and method of producing the same. The silicon based electro-optically active device comprising: a silicon-on-insulator (SOI) waveguide; an electro-optically active waveguide including an electro-optically active stack within a cavity of the SOI waveguide; and a lined channel between the electro-optically active stack and the SOI waveguide, the lined channel comprising a liner; wherein the lined channel is filled with a filling material with a refractive index similar to that of a material forming a sidewall of the cavity, to thereby form a bridge-waveguide in the channel between the SOI waveguide and the electro-optically active stack.
    Type: Grant
    Filed: May 11, 2018
    Date of Patent: September 21, 2021
    Assignee: Rockley Photonics Limited
    Inventors: Guomin Yu, Yi Zhang, Aaron John Zilkie
  • 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: 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: 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: 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