Optical Fiber Waveguide With Cladding Patents (Class 385/123)
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Patent number: 11681097Abstract: A method of forming a tapered tip of a polarization-maintaining (PM) fiber includes inserting a tip of the PM fiber into a first etchant solution characterized by a first etching rate for the core of the PM fiber and a second etching rate for the stress members of the PM fiber, the second etching rate being lower than the first etching rate, withdrawing the tip of the PM fiber from the first etchant solution at a withdrawal rate, immersing the tip of the PM fiber in a second etchant solution for a time duration. The second etchant solution is characterized by a third etching rate for the core and a fourth etching rate for the stress members, the fourth etching rate being greater than the third etching rate. The method further includes withdrawing the tip of the PM fiber from the second etchant solution.Type: GrantFiled: May 12, 2021Date of Patent: June 20, 2023Assignee: Magic Leap, Inc.Inventors: Sarah Colline McQuaide, Brian T. Schowengerdt
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Patent number: 11604354Abstract: A wearable display system includes one or more nanowire LED micro-displays. The nanowire micro-LED displays may be monochrome or full-color. The nanowire LEDs forming the arrays may have an advantageously narrow angular emission profile and high light output. Where a plurality of nanowire LED micro-displays is utilized, the micro-displays may be positioned at different sides of an optical combiner, for example, an X-cube prism which receives light rays from different micro-displays and outputs the light rays from the same face of the cube. The optical combiner directs the light to projection optics, which outputs the light to an eyepiece that relays the light to a user's eye. The eyepiece may output the light to the user's eye with different amounts of wavefront divergence, to place virtual content on different depth planes.Type: GrantFiled: March 31, 2021Date of Patent: March 14, 2023Assignee: Magic Leap, Inc.Inventors: Jahja I. Trisnadi, Clinton Carlisle
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Patent number: 11592616Abstract: The present disclosure provides an optical fibre (100). The optical fibre (100) includes a glass core region (102). The glass core region (102) has a core relative refractive index profile. The core relative refractive index profile is a super Gaussian profile. In addition, the optical fibre (100) includes a glass cladding region (108) over the glass core region (102). The optical fibre (100) has at least one of a mode field diameter in a range of 8.7 micrometers to 9.7 micrometers at wavelength of 1310 nanometers and an attenuation up to 0.18 dB/km. The optical fibre (100) has at least one of macro-bend loss up to 0.5 decibel per turn corresponding to wavelength of 1550 nanometer at bending radius of 7.5 millimeter. The optical fibre (100) has a macro-bend loss up to 1.0 decibel per turn corresponding to wavelength of 1625 nanometer at bending radius of 7.5 millimeter.Type: GrantFiled: May 11, 2021Date of Patent: February 28, 2023Assignee: Sterlite Technologies LimitedInventors: Srinivas Munige, Apeksha Malviya, Anand Pandey
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Patent number: 11577984Abstract: A method for manufacturing an optical fiber preform includes: producing a core preform including a core portion made of transparent glass and a first cladding layer obtained by adding fluorine to the core portion; and forming, on an outer periphery of the first cladding layer, a second cladding layer made of glass having a refractive index higher than that of the first cladding layer. Further, a refractive index profile is formed in the first cladding layer due to a fluorine concentration profile, the refractive index profile being provided at least near a boundary surface with the second cladding layer and having a profile such that a refractive index difference between a refractive index of the first cladding layer and a refractive index of the second cladding layer decreases in accordance with a reduction in a distance from the boundary surface with the second cladding layer.Type: GrantFiled: July 8, 2020Date of Patent: February 14, 2023Assignee: FURUKAWA ELECTRIC CO., LTD.Inventors: Mitsuhiro Kawasaki, Tomohiro Gonda
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Patent number: 11579428Abstract: A microscope for imaging a sample is disclosed that may include at least one illumination objective arranged to eject an illumination light beam along an illumination path to illuminate the sample; an imaging objective arranged to receive detection light including at least a portion of the light ejected from the sample, wherein the detection light is propagated along a detection axis and the imaging objective has an imaging focal plane; an adjustment arrangement to linearly displace the illumination light beam and the imaging focal plane relative to each other along the detection axis; a sample holder arranged to receive a sample and having a portion which is transparent to the illumination light beam and to the detection light; and a holder support arranged to receive the sample holder and displace the sample holder relative to the imaging objective such that the imaging focal plane is positioned inside the sample holder.Type: GrantFiled: July 20, 2018Date of Patent: February 14, 2023Assignee: VIVENTIS MICROSCOPY SARLInventors: Petr Strnad, Andrea Boni
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Patent number: 11567258Abstract: The present disclosure discloses an optical device structure including an optical fiber including a core part, a clad part, and a three-dimensional micro hole structure in the clad part, wherein a surface of the three-dimensional micro hole structure is provided with at least a non-flat surface, and a conformal graphene layer is formed on the surface of the three-dimensional micro hole structure, and a method of manufacturing the same.Type: GrantFiled: February 7, 2022Date of Patent: January 31, 2023Assignees: Korea Institute of Science and Technology, Korea Institute of Machinery & MaterialsInventors: Yong Won Song, Md. Siam Uddin, Jiyeon Choi, Sungil Kim, Dohyun Kim
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Patent number: 11567265Abstract: In various embodiments, the beam parameter product and/or numerical aperture of a laser beam is adjusted utilizing a step-clad optical fiber having a central core, a first cladding, an annular core, and a second cladding.Type: GrantFiled: October 22, 2020Date of Patent: January 31, 2023Assignee: TERADIODE, INC.Inventors: Wang-Long Zhou, Francisco Villarreal-Saucedo, Parviz Tayebati, Bien Chann
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Patent number: 11563299Abstract: An all-fiber configuration system and method for generating temporally coherent supercontinuum pulsed emission are provided. The system includes a sequential structure of all-fiber sections including: a fiber laser seed source to produce a seed pulse with given optical properties; a stretching section including an optical fiber to temporally stretch the seed pulse; an amplification section including an active optical fiber, doped with a rare earth element, to amplify the stretched pulse by progressively stimulating radiation of active ions of the doped active optical fiber; a compressing section to temporally compress the amplified pulse; and a spectrum broadening section including an ANDi microstructured fiber that spectrally broadens the compressed pulse by a nonlinear effect of Self Phase Modulation (SPM) while maintaining the temporal coherence of the pulse.Type: GrantFiled: April 21, 2020Date of Patent: January 24, 2023Assignee: FYLA LASER, S.L.Inventors: Pere Pérez Millán, Salvador Torres Peiró, Héctor Muñoz Marco
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Patent number: 11554979Abstract: A system for processing optical fiber includes a draw furnace, a fiber conveyance pathway extending between an upstream end positioned at the draw furnace and a downstream end positioned opposite the upstream end, where optical fiber is conveyed along the fiber conveyance pathway from the upstream end to the downstream end in a fiber conveyance direction, a muffle in communication with the draw furnace and positioned downstream of the draw furnace, a second cooling device annularly surrounding the fiber conveyance pathway downstream from the draw furnace, the second cooling device including one or more second cooling device heating elements and a first cooling device positioned between the draw furnace and the second cooling device, wherein the first cooling device directs a fluid to contact the optical fiber.Type: GrantFiled: December 3, 2020Date of Patent: January 17, 2023Assignee: Corning IncorporatedInventors: Steven Akin Dunwoody, Nikolaos Pantelis Kladias, Robert Clark Moore, Jason Roy Pace, Christopher Scott Thomas, Bryan William Wakefield, Chunfeng Zhou
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Patent number: 11543407Abstract: A fully integrated miniaturized optical biosensor and methods of making the same are disclosed. The biosensor may include a fluid transport system and an optical system.Type: GrantFiled: May 1, 2015Date of Patent: January 3, 2023Assignee: Arizona Board of Regents on behalf of Arizona State UniversityInventors: Joseph Smith, Jennifer Blain Christen, Karen Anderson, Benjamin Katchman
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Patent number: 11519817Abstract: An object of the present invention is to provide a Raman gain efficiency distribution testing method and a Raman gain efficiency distribution testing apparatus for measuring a Raman gain efficiency distribution of a fundamental mode and a first high-order mode in a few-mode fiber.Type: GrantFiled: August 16, 2019Date of Patent: December 6, 2022Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Atsushi Nakamura, Keiji Okamoto, Tetsuya Manabe
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Patent number: 11493611Abstract: The invention provides a laser scanner, which comprises a light source unit, a light receiving unit, a distance measuring unit, an angle measuring unit, a telescope unit capable of rotating in a horizontal direction and a vertical direction, a rotation driving unit, a directional angle detector, and a control arithmetic unit, wherein the light source unit is an MOPA type and has an oscillator control circuit, a main oscillator, and an optical amplifier, wherein the oscillator control circuit has a repetition frequency setting component, a pulse peak output setting component, a pulse width setting component and an amplification factor calculating component and oscillates the main oscillator corresponding to a measured distance, and wherein the amplification factor calculating component calculates an amplification factor based on a repetition frequency, a pulse peak output, and a pulse width and amplifies the optical amplifier based on a calculated amplification factor.Type: GrantFiled: April 18, 2019Date of Patent: November 8, 2022Assignee: TOPCON CorporationInventors: Noriyasu Kiryuu, Taizo Eno
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Patent number: 11460632Abstract: An optical fiber includes a glass portion, a primary coating layer, and a secondary coating layer. In the optical fiber, a value of microbend loss characteristic factor F?BL_GO is 2.6 ([GPa?1·?m?10.5·dB/turn]·10?27) or less, when represented by F?BL_GO=F?BL_G×F?BL_O by using geometry microbend loss characteristic F?BL_G and optical microbend loss characteristic F?BL_O.Type: GrantFiled: November 6, 2020Date of Patent: October 4, 2022Assignee: Fujikura Ltd.Inventor: Ryo Maruyama
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Patent number: 11454580Abstract: Methods for preform and tube draw based on controlling forming zone viscosity determined by calculating a holding force exerted by the glass component in the forming zone on the strand being drawn below. The holding force may be calculated by determining a gravitational force applied to the strand and a pulling force applied to the strand by a pulling device, where the holding force is equal to the opposite of the algebraic sum of the gravitational and pulling forces. The holding force may also be calculated by measuring a stress-induced birefringence in the strand at a point between the forming zone and the pulling device, determining an amount of force applied to the strand at the point corresponding to the birefringence, and calculating the holding force by correcting the amount of force for a gravitational effect of the weight of the strand between the forming zone and the point.Type: GrantFiled: October 14, 2014Date of Patent: September 27, 2022Assignee: Heraeus Quartz North America LLCInventors: Georges Levon Fattal, James E. Beavers, Jr., Kai Huei Chang, Evan P. Green, Qiulin Ma
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Patent number: 11438071Abstract: 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: GrantFiled: December 3, 2019Date of Patent: September 6, 2022Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Hirotaka Ono, Koki Shibahara, Takayuki Mizuno, Yutaka Miyamoto
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Patent number: 11428865Abstract: 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: GrantFiled: August 1, 2018Date of Patent: August 30, 2022Assignee: University of SouthamptonInventors: Gregory Teofil Jasion, Francesco Poletti, Yong Chen, Eric Rodrigue Numakm Fokoua, Thomas David Bradley
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Patent number: 11401192Abstract: 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: GrantFiled: December 28, 2017Date of Patent: August 2, 2022Assignees: Heraeus Deutschland GmbH & Co. KG, Shin-Etsu Quartz Products Co., Ltd.Inventors: Kotaro Sumi, Hikari Kuwahara
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Patent number: 11378738Abstract: 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: GrantFiled: April 13, 2021Date of Patent: July 5, 2022Assignee: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Hiroki Kojima, Dai Inoue
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Patent number: 11378736Abstract: 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: GrantFiled: October 9, 2018Date of Patent: July 5, 2022Assignee: Corning IncorporatedInventors: Anthony Sebastian Bauco, Carl Edgar Crossland
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Patent number: 11373112Abstract: 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: GrantFiled: January 24, 2020Date of Patent: June 28, 2022Assignee: United States of America as represented by the Secretary of the NavyInventors: Brian A. Higa, Kenneth S. Simonsen, Osama M. Nayfeh
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Patent number: 11362478Abstract: 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: GrantFiled: December 19, 2019Date of Patent: June 14, 2022Assignee: Lockheed Martin CorporationInventor: Matthias P. Savage-Leuchs
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Patent number: 11340467Abstract: 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: GrantFiled: April 28, 2020Date of Patent: May 24, 2022Assignee: Lumentum Operations LLCInventors: Patrick Gregg, Richard D. Faulhaber, Martin H. Muendel, Vincent Petit, James J. Morehead
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Patent number: 11340397Abstract: 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: GrantFiled: August 21, 2020Date of Patent: May 24, 2022Assignee: Adamant Namiki Precision Jewel Co., Ltd.Inventors: Koji Horiguchi, Yasuhiro Hyakutake, Yoshitada Beppu, Tadahisa Iikubo, Tomohiro Kikuta
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Patent number: 11316587Abstract: 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: GrantFiled: September 21, 2020Date of Patent: April 26, 2022Assignee: COMMSCOPE TECHNOLOGIES LLCInventors: John Charles Chamberlain, Sander Johannes Floris
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Patent number: 11312650Abstract: 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: GrantFiled: July 25, 2018Date of Patent: April 26, 2022Assignee: REDWIRE SPACE, INC.Inventors: Jan Clawson, Robert White, Nate Pickslay, Michael Snyder, Geoffrey York Powers, Noah Paul-Gin
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Patent number: 11310481Abstract: 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: GrantFiled: October 25, 2018Date of Patent: April 19, 2022Assignee: SONY CORPORATIONInventors: Paul Springer, Thimo Emmerich, Zoltan Facius
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Patent number: 11309677Abstract: 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: GrantFiled: January 29, 2021Date of Patent: April 19, 2022Assignee: INSTITUT NATIONAL D'OPTIQUEInventors: Antoine Proulx, Vincent Roy, Mathieu Boivin, Yves Taillon
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Patent number: 11298007Abstract: 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: GrantFiled: August 9, 2021Date of Patent: April 12, 2022Inventor: Hua Shang
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Patent number: 11288941Abstract: 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: GrantFiled: November 8, 2017Date of Patent: March 29, 2022Assignee: CARRIER CORPORATIONInventors: Michael J. Birnkrant, David L. Lincoln, Jennifer M. Alexander, Peter R. Harris
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Patent number: 11287567Abstract: 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: GrantFiled: May 22, 2019Date of Patent: March 29, 2022Assignee: Corning IncorporatedInventors: Scott Robertson Bickham, Dana Craig Bookbinder, Ming-Jun Li, Snigdharaj Kumar Mishra, Pushkar Tandon
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Patent number: 11287572Abstract: 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: GrantFiled: August 31, 2020Date of Patent: March 29, 2022Assignee: NufernInventors: Clemence Jollivet, Kevin Farley, Jaroslaw Abramczyk, Michael Conroy, Kanishka Tankala
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Patent number: 11280958Abstract: 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: GrantFiled: February 27, 2019Date of Patent: March 22, 2022Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Yuki Kawaguchi, Yoshiaki Tamura, Hirotaka Sakuma
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Patent number: 11275213Abstract: 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: GrantFiled: October 31, 2018Date of Patent: March 15, 2022Assignee: Corning Research & Development CorporationInventors: Alan Frank Evans, Davide Domenico Fortusini, Ming-Jun Li, Aramais Robert Zakharian
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Patent number: 11262501Abstract: 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: GrantFiled: December 2, 2015Date of Patent: March 1, 2022Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Irfan Bulu, Francois M. Auzerais, Robert Graham, Mohamed Aly Sadek
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Patent number: 11243347Abstract: 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: GrantFiled: September 12, 2020Date of Patent: February 8, 2022Inventor: Eric Swanson
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Patent number: 11245241Abstract: 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: GrantFiled: October 7, 2019Date of Patent: February 8, 2022Assignee: FANUC CORPORATIONInventors: Hiroshi Takigawa, Tetsuhisa Takazane
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Patent number: 11243346Abstract: 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: GrantFiled: September 12, 2020Date of Patent: February 8, 2022Inventor: Eric Swanson
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Patent number: 11226506Abstract: 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: GrantFiled: March 17, 2020Date of Patent: January 18, 2022Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Shih-Wei Lin, Ming Chyi Liu
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Patent number: 11221670Abstract: 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: GrantFiled: July 17, 2017Date of Patent: January 11, 2022Assignee: Light Field Lab, Inc.Inventors: Jonathan Sean Karafin, Brendan Elwood Bevensee
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Patent number: 11215752Abstract: 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: GrantFiled: December 4, 2020Date of Patent: January 4, 2022Assignee: Apple Inc.Inventors: Wei Lin, Di Liu, Chunchia Huang, Nathan K. Gupta, Prabhakar Gulgunje, Shenglin Ye, Shubhaditya Majumdar
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Patent number: 11209596Abstract: 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: GrantFiled: June 23, 2020Date of Patent: December 28, 2021Assignee: NANCHANG HANGKONG UNIVERSITYInventors: Bin Liu, Wei Luo, Qiang Wu, Juan Liu, Shengpeng Wan, Xingdao He
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Patent number: 11198233Abstract: 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: GrantFiled: October 16, 2019Date of Patent: December 14, 2021Assignee: Magic Leap, Inc.Inventors: Sharad D. Bhagat, Chieh Chang, Christophe Peroz
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Patent number: 11201001Abstract: 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: GrantFiled: December 4, 2020Date of Patent: December 14, 2021Assignee: HEW-KABEL GMBHInventor: Ingo Hollas
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Patent number: 11190272Abstract: 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: GrantFiled: December 18, 2020Date of Patent: November 30, 2021Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventor: Zhiping Jiang
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Patent number: 11187830Abstract: 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: GrantFiled: January 3, 2018Date of Patent: November 30, 2021Assignee: Samsung SDI Co., Ltd.Inventors: Byung Joo Byun, Young Jong Kim, Do Heon Lee, In Cheon Han
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Patent number: 11175449Abstract: 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: GrantFiled: October 18, 2019Date of Patent: November 16, 2021Assignee: Lumentum Operations LLCInventors: Vincent Petit, Martin H. Muendel
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Patent number: 11175450Abstract: 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: GrantFiled: August 1, 2019Date of Patent: November 16, 2021Assignee: Corning IncorporatedInventors: Dana Craig Bookbinder, Steven Bruce Dawes, Phong Diep, Brian Lee Harper, Pushkar Tandon
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Patent number: 11169323Abstract: 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: GrantFiled: October 12, 2016Date of Patent: November 9, 2021Assignee: Zeus Industrial Products, Inc.Inventors: Brian R. Tomblin, Shannon M. Giovannini, Matthew W. Cox, Aaron E. Hydrick
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Patent number: 11169322Abstract: 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: GrantFiled: February 27, 2019Date of Patent: November 9, 2021Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Yuki Kawaguchi, Yoshiaki Tamura, Hirotaka Sakuma
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Patent number: 11156636Abstract: 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: GrantFiled: September 25, 2019Date of Patent: October 26, 2021Assignee: NATIONAL INSTITUTE OF METROLOGY, CHINAInventors: Zhen-Dong Zhu, Si-Tian Gao, Wei Li