Concentric Patents (Class 385/127)
  • Patent number: 10361787
    Abstract: Methods and systems for optical alignment to a silicon photonically-enabled integrated circuit may include aligning an optical assembly to a photonics die comprising a transceiver by, at least, communicating optical signals from the optical assembly into a plurality of grating couplers in the photonics die, communicating the one or more optical signals from the plurality of grating couplers to optical taps, with each tap having a first output coupled to the transceiver and a second output coupled to a corresponding output grating coupler, and monitoring an output optical signal communicated out of said photonic chip via said output grating couplers. The monitored output optical signal may be maximized by adjusting a position of the optical assembly. The optical assembly may include an optical source assembly comprising one or more lasers or the optical assembly may comprise a fiber array. Such a fiber array may include single mode optical fibers.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: July 23, 2019
    Assignee: Luxtera, Inc.
    Inventors: Michael Mack, Anders Dahl, Subal Sahni, Steffen Gloeckner
  • Patent number: 10297435
    Abstract: The invention relates to a micro-nozzle array comprising a plurality of capillaries comprising a first silica-based material and a second silica-based material substantially surrounding the first silica-based material of the plurality of capillaries, and a plurality of nozzles extending beyond a face of the micro-nozzle array, each nozzle corresponding to a single capillary, wherein each nozzle comprises the first silica-based material. The micro-nozzle array may be used in hydrodynamic or electro-osmotic applications. In one embodiment the micro-nozzle array is a multiple electrospray emitter. The invention also relates to methods for preparing and using micro-nozzle arrays.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: May 21, 2019
    Assignee: Queen's University at Kingston
    Inventors: Richard D. Oleschuk, Yueqiao Fu, Graham Gibson, Timothy Hutama
  • Patent number: 10259742
    Abstract: An optical fiber has a core region that is doped with one or more viscosity-reducing dopants in respective amounts that are configured, such that, in a Raman spectrum with a frequency shift of approximately 600 cm?1, the fiber has a nanoscale structure having an integrated D2 line defect intensity of less than 0.025. Alternatively, the core region is doped with one or more viscosity-reducing dopants in respective amounts that are configured such that the fiber has a residual axial compressive stress with a stress magnitude of more than 20 MPa and a stress radial extent between 2 and 7 times the core radius. According to another aspect of the invention a majority of the optical propagation through the fiber is supported by an identified group of fiber regions comprising the core region and one or more adjacent cladding regions.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: April 16, 2019
    Assignee: OFS FITEL, LLC
    Inventors: Man F. Yan, Peter I. Borel, Tommy Geisler, Rasmus V. S. Jensen, Ole A. Levring, Jorgen Ostgaard Olsen, David W. Peckham, Dennis J. Trevor, Patrick W. Wisk, Benyuan Zhu
  • Patent number: 10197728
    Abstract: The core region of an optical fiber is doped with chlorine in a concentration that allows for the viscosity of the core region to be lowered, approaching the viscosity of the surrounding cladding. An annular interface region is disposed between the core and cladding and contains a concentration of fluorine dopant sufficient to match the viscosity of the core. By including this annular stress accommodation region, the cladding layer can be formed to include the relatively high concentration of fluorine required to provide the desired degree of optical signal confinement (i.e., forming a “low loss” optical fiber). The inclusion of the annular stress accommodation region allows for the formation of a large effective area optical fiber that exhibits low loss (i.e., <0.19 dB/km) in both the C-band and L-band transmission ranges.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: February 5, 2019
    Assignee: OFS FITEL, LLC
    Inventors: Peter I Borel, Rasmus V. S. Jensen, Ole A Levring, Jorgen Ostgaard Olsen, David W Peckham, Dennis J Trevor, Patrick W Wisk, Man F Yan
  • Patent number: 10156672
    Abstract: The present invention is directed to an optical fiber that includes a glass core region that has nano-sized structures configured to scatter light propagating in the glass core region. The glass core region has an average refractive index navg. The fiber includes an interior glass cladding region that has an interior cladding refractive index n2 that is less than navg. The fiber includes an outer cladding region that has an outer cladding refractive index n3 that is less than n2. A refractive index difference of n2?n3 corresponds to a bend uniformity diameter; the light exiting the outer cladding at a fiber bending location is substantially non-uniform when a bending diameter of the fiber bending location is less than the bend uniformity diameter.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: December 18, 2018
    Assignee: CORNING INCORPORATED
    Inventors: Seldon David Benjamin, Kevin Wallace Bennett
  • Patent number: 10146008
    Abstract: An optical fiber with low attenuation and methods of making same are disclosed. The optical fiber has a core, an inner cladding surround the core, and an outer cladding surrounding the inner cladding. The outer cladding is chlorine-doped such that the relative refractive index varies as a function of radius. The radially varying relative refractive index profile of the outer cladding reduces excess stress in the core and inner cladding, which helps lower fiber attenuation while also reducing macrobend and microbend loss. A process of fabricating the optical fiber includes doping an overclad soot layer of a soot preform with chlorine and then removing a portion of the chlorine dopant from an outermost region of the overclad soot layer. The soot preform with the modified chlorine dopant profile is then sintered to form a glass preform, which can then be used for drawing the optical fiber.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: December 4, 2018
    Assignee: Corning Incorporated
    Inventors: Dana Craig Bookbinder, Paul Andrew Chludzinski, Brian Lee Harper, Ming-Jun Li, Snigdharaj Kumar Mishra, Sonya Marie Raney, Pushkar Tandon
  • Patent number: 10116035
    Abstract: An electrically conductive article that includes a monolithic glass body having a first primary surface; and an electrically conducting element formed in the body. The element includes a discrete layer, or a plurality of discrete layers, of metallic silver. Each layer has a thickness T such that 0.1 ?m?T?0.5 ?m and an electrical resistivity of about 50 n?·m to about 2000 n?·m. In addition, the element is spaced apart from the first primary surface by a distance D, wherein 0.1 ?m?D?20 ?m. In some aspects, the electrically conducting element and/or the monolithic glass body are configured as an antenna assembly, an optical fiber or a flexible glass substrate.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: October 30, 2018
    Assignee: Corning Incorporated
    Inventors: Nicholas Francis Borrelli, Anthony Ng'oma, Alranzo Boh Ruffin, Joseph Francis Schroeder, III, Dean Michael Thelen
  • Patent number: 10094973
    Abstract: Optical fibers having a mode field diameter at 1310 nm of at least 8.8 ?m, wire mesh covered drum microbending losses at 1550 nm less than 0.03 dB/km, and a 2 m cutoff wavelength less than 1320 nm. The fibers may include a central core region, an inner cladding region, an outer cladding region, a primary coating with an in situ modulus less than 0.20 MPa and glass transition temperature less than ?35° C., and a secondary coating with an in situ modulus greater than 1500 MPa. The fibers may further include a depressed index cladding region. The relative refractive index of the central core region may be greater than the relative refractive index of the outer cladding region may be greater than the relative refractive index of the inner cladding region. The fibers may be produced at draw speeds of 30 m/s or greater.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: October 9, 2018
    Assignee: Corning Incorporated
    Inventors: Scott Robertson Bickham, Kevin Alton Lewis, Snigdharaj Kumar Mishra, Manuela Ocampo, Joan Diana Patterson
  • Patent number: 10018780
    Abstract: A doping optimized single-mode optical fiber with ultra low attenuation includes a core layer and cladding layers. The cladding layers has an inner cladding layer surrounding the core layer, a trench cladding layer surrounding the inner cladding layer, an auxiliary outer cladding layer surrounding the trench cladding layer, and an outer cladding layer surrounding the auxiliary outer cladding layer. The content of fluorine in the core layer is ?0.5 wt %, ?Ge?0.12%, ?n1?0.12%. The content of fluorine in the inner cladding layer is 0.5-1.5 wt %, ?n2??0.14%. The content of fluorine in the trench cladding layer is 1-3 wt %, ?n3??0.25%. The content of fluorine in the auxiliary outer cladding layer is 0.5-2 wt %, ?n4??0.14%. The outer cladding layer is a pure silicon dioxide glass layer and/or a metal-doped silicon dioxide glass layer.
    Type: Grant
    Filed: October 4, 2017
    Date of Patent: July 10, 2018
    Assignee: YANGTZE OPTICAL FIBRE AND CABLE JOINT STOCK LIMITED COMPANY
    Inventors: Lei Zhang, Shengya Long, Jihong Zhu, Jun Wu, Ruichun Wang
  • Patent number: 9995873
    Abstract: Optical fibers having a large effective area are disclosed. Three main embodiments of the optical fiber allow for single-mode operation at wavelengths of 850 nm, 980 nm and 1060 nm, respectively and have a large effective area with low bend losses. 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 photonic integrated devices. Integrated systems and optical communication systems that employ the optical fibers are also disclosed.
    Type: Grant
    Filed: July 25, 2017
    Date of Patent: June 12, 2018
    Assignee: Corning Incorporated
    Inventors: Scott Robertson Bickham, Dana Craig Bookbinder, Ming-Jun Li, Pushkar Tandon
  • Patent number: 9919955
    Abstract: An optical fiber has a core region that is doped with one or more viscosity-reducing dopants in respective amounts that are configured, such that, in a Raman spectrum with a frequency shift of approximately 600 cm?1, the fiber has a nanoscale structure having an integrated D2 line defect intensity of less than 0.025. Alternatively, the core region is doped with one or more viscosity-reducing dopants in respective amounts that are configured such that the fiber has a residual axial compressive stress with a stress magnitude of more than 20 MPa and a stress radial extent between 2 and 7 times the core radius. According to another aspect of the invention a majority of the optical propagation through the fiber is supported by an identified group of fiber regions comprising the core region and one or more adjacent cladding regions.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: March 20, 2018
    Assignee: OFS FITEL, LLC
    Inventors: Man F Yan, Peter I Borel, Tommy Geisler, Rasmus V Jensen, Ole A Levring, Jorgen Ostgaard Olsen, David W Peckham, Dennis J Trevor, Patrick W Wisk, Benyuan Zhu
  • Patent number: 9915819
    Abstract: The present invention is directed to a fiber optic device that enables multiphoton imaging with improved signal-to-noise ratio having a single piece of double-clad fiber (DCF). The device also includes all components for focusing, scanning and signal collection within an endomicroscope probe of 2.1 mm outer diameter (OD). The unprecedented imaging capability of this miniature endomicroscope is demonstrated herein via both ex vivo and in vivo experiments.
    Type: Grant
    Filed: June 1, 2016
    Date of Patent: March 13, 2018
    Assignee: The Johns Hopkins University
    Inventors: Xingde Li, Yicong Wu, Wenxuan Liang
  • Patent number: 9874686
    Abstract: An optical fiber comprising: (i) a core comprising silica and having a maximum relative refractive index delta ?1MAX; and LP01 effective area >100 ?m2 at 1550 nm; (ii) an inner cladding surrounding the core and having a minimum relative refractive index delta ?2MIN and ?coreMAX>?2MIN; (iii) an outer cladding surrounding the inner cladding and comprising a first outer cladding portion with a maximum refractive index ?3A such that ?3A>?2MIN; and another outer cladding portion surrounding the first outer cladding portion with a maximum refractive index delta ?3B wherein with a maximum refractive index delta ?3B wherein ?3B>?3A, said another portion being the outermost portion of the outer cladding; and (iv) a coating layer surrounding the outer cladding, and in contact with said another outer cladding portion, the coating layer having a relative refractive index delta ?C wherein ?C>?3B.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: January 23, 2018
    Assignee: Corning Incorporated
    Inventors: Snigdharaj Kumar Mishra, Michal Mlejnek, James Andrew West, William Allen Wood, Aramais Robert Zakharian
  • Patent number: 9837783
    Abstract: An optical apparatus includes one or more pump sources situated to provide laser pump light, and a gain fiber optically coupled to the one or more pump sources, the gain fiber including an actively doped core situated to produce an output beam, an inner cladding and outer cladding surrounding the doped core and situated to propagate pump light, and a polymer cladding surrounding the outer cladding and situated to guide a selected portion of the pump light coupled into the inner and outer claddings of the gain fiber. Methods of pumping a fiber sources include generating pump light from one or more pump sources, coupling the pump light into a glass inner cladding and a glass outer cladding of a gain fiber of the fiber source such that a portion of the pump light is guided by a polymer cladding surrounding the glass outer cladding, and generating a single-mode output beam from the gain fiber.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: December 5, 2017
    Assignee: nLIGHT, Inc.
    Inventors: Dahv A. V. Kliner, Roger L. Farrow
  • Patent number: 9831629
    Abstract: A hybrid fiber rod includes a fiber core and inner and outer cladding layers. The core is doped with an active element. The inner cladding layer surrounds the core, and has a refractive index substantially equal to that of the core. The outer cladding layer surrounds the inner cladding layer, and has a refractive index less than that of the core and inner cladding layer. The core length is about 30 to 2000 times the core diameter. A hybrid fiber rod laser system includes an oscillator laser, modulating device, the rod, and pump laser diode(s) energizing the rod from opposite ends. The rod acts as a waveguide for pump radiation but allows for free-space propagation of laser radiation. The rod may be used in a laser resonator. The core length is less than about twice the Rayleigh range. Degradation from single-mode to multi-mode beam propagation is thus avoided.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: November 28, 2017
    Assignee: THE UNITED STATES OF AMERICA AS REPRESENTED BY THE ADMINISTRATOR OF THE NASA
    Inventors: George E. Busch, Farzin Amzajerdian, Diego F. Pierrottet
  • Patent number: 9811163
    Abstract: A device including an elastic layer that, when depressed by an object, causes a local indentation in the layer, the geometry of the local indentation being in accordance with a force of depression, light emitters, light detectors, a light guide between the emitters and the layer directing light beams from the emitters into the layer at an angle such that the light beams, after entering the layer, remain confined to the layer by total internal reflection, a light guide between the detectors and the layer that directs light beams exiting the layer onto the detectors, each detector having a reference output value corresponding to expected light detection when no object is touching the layer, and a processor determining the object's force of depression based on the geometry of the local indentation in the layer, as calibrated by a deviation between actual and reference output values for one of the detectors.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: November 7, 2017
    Assignee: Neonode Inc.
    Inventors: Thomas Eriksson, Michael Lawrence Elyan
  • Patent number: 9788898
    Abstract: An apparatus may include an optical fiber having an angled grating aligned along a plane non-normal to a longitudinal axis of a distal end portion of the optical fiber. The angled grating may be configured to redirect a first laser energy propagated within the optical fiber and incident on the angled grating to a direction offset from the longitudinal axis. The apparatus may also include a metallic cap coupled to the optical fiber. The metallic cap may have an inner surface configured to redirect a second laser energy incident on the inner surface along the direction offset from the longitudinal axis. The second laser energy being different than the first laser energy.
    Type: Grant
    Filed: September 22, 2014
    Date of Patent: October 17, 2017
    Assignee: Boston Scientific Scimed, Inc.
    Inventor: Jeffrey W. Zerfas
  • Patent number: 9726817
    Abstract: Disclosed is a small-diameter polarization maintaining optical fiber, which relates to the field of special optical fibers. The small-diameter polarization maintaining optical fiber comprises a quartz optical fiber (5); the periphery thereof is provided with an inner coating (6) and an outer coating (8); the interior of the quartz optical fiber (5) is provided with an optical fiber core layer (1) and a quartz cladding (2); two stress zones (4) are arranged between the optical fiber core layer (1) and the quartz cladding (2); a buffer coating (7) is arranged between the inner coating (6) and the outer coating (8); the periphery of each stress zone (4) is provided with a buffer layer (3) which is concentric with the stress zone (4); when a working wavelength of a small-diameter polarization maintaining optical fiber is 1310 nm, the attenuation thereof reaches less than 0.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: August 8, 2017
    Assignee: FIBERHOME TELECOMMUNICATION TECHNOLOGIES CO., LTD.
    Inventors: Wenyong Luo, Zhijian Liu, Yili Ke, Qi Mo, Fuming Hu, Qiong Lei, Zhiwen Kang, Rong Dan, Lei Zhao
  • Patent number: 9692201
    Abstract: A bundle structure is obtained by arranging optical fibers having equal diameters in a close-packed arrangement around the outer circumference of a center optical fiber. The optical fibers are signal light optical fibers that transmit signal lights. The optical fiber is a pump light optical fiber that transmits pump light. The number of optical fibers is equal to the number of cores in the multi-core fiber. The bundle structure and the multi-core fiber are connected to one another by adhering or fusing. The cores and the cores are optically connected, and the core and the cladding are optically connected. When connecting, the mode field diameter of the cores and the cores are substantially equivalent. In addition, the outer diameter (diameter of circumscribed circle including optical fibers) of the bundle structure is set so as not to be greater than the outer diameter of the multi-core fiber.
    Type: Grant
    Filed: August 25, 2015
    Date of Patent: June 27, 2017
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Kengo Watanabe, Tsunetoshi Saito, Yukihiro Tsuchida, Koichi Maeda, Katsunori Imamura
  • Patent number: 9683936
    Abstract: A laser light source for emitting excitation light, a sample case, a photomultiplier tube, a fluorescence collecting optical system and so forth are embedded in a resin material that is transparent to the excitation light and the light including fluorescence emitted from a sample. The resin material is provided in at least part of a light path that guides the fluorescence in the fluorescence collecting optical system, and this resin forms a housing that holds the laser light source, the fluorescence collecting optical system, the photomultiplier and so forth. A pigment having wavelength characteristics for absorbing the excitation light, Raman light generated from the resin, and so forth is contained substantially in a uniform manner in a resin region that surrounds the light path through which the excitation light and the light including the fluorescence pass.
    Type: Grant
    Filed: July 5, 2013
    Date of Patent: June 20, 2017
    Assignees: USHIO DENKI KABUSHIKI KAISHA, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Yuji Oki, Hiroaki Yoshioka, Kinichi Morita
  • Patent number: 9658395
    Abstract: The core region of an optical fiber is doped with chlorine in a concentration that allows for the viscosity of the core region to be lowered, approaching the viscosity of the surrounding cladding. An annular interface region is disposed between the core and cladding and contains a concentration of fluorine dopant sufficient to match the viscosity of the core. By including this annular stress accommodation region, the cladding layer can be formed to include the relatively high concentration of fluorine required to provide the desired degree of optical signal confinement (i.e., forming a “low loss” optical fiber).
    Type: Grant
    Filed: August 13, 2015
    Date of Patent: May 23, 2017
    Assignee: OFS FITEL, LLC
    Inventors: Peter I Borel, Rasmus V. S. Jensen, Ole A Levring, Jorgen Ostgaard Olsen, David W Peckham, Dennis J Trevor, Patrick W Wisk, Man F Yan
  • Patent number: 9588287
    Abstract: An embodiment of the invention relates to a BI-MMF with OH group concentrations controlled along a radial direction. In the BI-MMF, an OH group concentration distribution along the radial direction has a shape in which a concentration peak is located in a concentration control interval provided between an outer periphery of a core and a trench part, including an interface between the core and trench part.
    Type: Grant
    Filed: August 5, 2015
    Date of Patent: March 7, 2017
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventor: Sumio Hoshino
  • Patent number: 9540542
    Abstract: There is provided a cycloaliphatic resin, from which it is possible to formulate anticorrosive coatings, using the cycloaliphatic resin alone or as hybrid with epoxy cycloaliphatic resins or hydroxy-functionalized resins; both mixed with amino or aminosilane hardeners. The obtained coatings have superior physical properties of weatherability, gloss retention, toughness and impact resistance.
    Type: Grant
    Filed: January 21, 2015
    Date of Patent: January 10, 2017
    Assignee: CENTRO DE INVESTIGACÍON EN POLÍMEROS S.A. DE C.V.
    Inventor: Jaime Cordero-Basave
  • Patent number: 9477035
    Abstract: An optical device includes: multiple cores each including an inner core and an outer core surrounding an outer circumferential surface of the inner core without any gap therebetween; and cladding surrounding an outer circumferential surface of the cores without any gap therebetween and having a refractive index lower than that of the outer core, wherein each of the cores has a tapered portion that is tapered from one side toward the other side thereof in a longitudinal direction, each of the inner cores includes a low-refractive-index portion, and a high-refractive-index portion surrounding an outer circumferential surface of the low-refractive-index portion without any gap therebetween and having a refractive index higher than that of the low-refractive-index portion, and the outer core has a refractive index lower than that of the high-refractive-index portion.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: October 25, 2016
    Assignees: FUJIKURA LTD., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY
    Inventors: Hitoshi Uemura, Katsuhiro Takenaga, Kunimasa Saitoh
  • Patent number: 9459402
    Abstract: Optical fiber profiles are shown in which the optical fiber has a large mode area, but is nevertheless sufficiently bend-insensitivity to comply with technical specifications for telecommunication optical fibers. The optical fibers meet two bend-loss conditions. First, they meet tight bend conditions, which reflects macro-bending due to coiling or bending of the optical fiber. Second, these optical fibers meet cable bend conditions, which reflect macro-bending conditions that are introduced as a result of cabling. By satisfying the tight bend-loss condition and then adjusting for the cable bend-loss condition, the optical fiber permits larger effective areas than normally achievable with only bend-compensation designs.
    Type: Grant
    Filed: June 12, 2014
    Date of Patent: October 4, 2016
    Assignee: OFS FITEL, LLC
    Inventor: John M Fini
  • Patent number: 9450373
    Abstract: Cladding-pumped Raman fiber lasers and amplifiers provide high-efficiency conversion efficiency at high brightness enhancement. Differential loss is applied to both single-pass configurations appropriate for pulsed amplification and laser oscillator configurations applied to high average power cw source generation.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: September 20, 2016
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: John E. Heebner, Arun K. Sridharan, Jay Walter Dawson, Michael J. Messerly, Paul H. Pax
  • Patent number: 9348087
    Abstract: In one aspect of the invention, the bend insensitive single-mode optical fiber includes a core layer and cladding layers having an inner cladding layer, a trench cladding layer and an outer cladding layer sequentially formed surrounding the core layer from inside to outside. For the core layer, the diameter is 7-7.9 ?m, and the relative refractive index difference ?1 is between 4.6×10?3 and 6.0×10?3. For the inner cladding layer, the diameter is 15-17 ?m, and a relative refractive index difference ?2 is between ?3×10?4 and 3×10?4. For the trench cladding layer, the diameter is 24-33 ?m, and the relative refractive index difference ?3 is between ?2.9×10?3 and ?7.3×10?3, changes in a gradient manner and increases gradually from outside to inside, where a relative refractive index difference ?32 at an outermost interface is smaller than a relative refractive index difference ?31 at an innermost interface.
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: May 24, 2016
    Assignee: YANGTZE OPTICAL FIBRE AND CABLE JOINT STOCK LIMITED COMPANY
    Inventors: Lei Zhang, Yiwen Wu, Haolin Guo, Jinyan Zhang, Ruichun Wang, Raadjkoemar Matai
  • Patent number: 9335462
    Abstract: A variety of luminaire modules are disclosed that are configured to output light provided by multiple light-emitting elements (LEEs). In general, embodiments of the luminaire modules feature at least two LEEs disposed on at least one substrate, at least two light guides that receive light from corresponding LEEs of the at least two LEEs, and at least one optical extractor that receives light from corresponding light guides from the at least two light guides.
    Type: Grant
    Filed: July 18, 2014
    Date of Patent: May 10, 2016
    Assignee: Quarkstar LLC
    Inventor: Allan Brent York
  • Patent number: 9291771
    Abstract: Provided is an optical fiber having a W-type refractive-index profile and having a reduced bend loss at a practically used bend radius. The optical fiber of the invention comprises: a core; an inner cladding enclosing the core and having a refractive index smaller than the refractive index of the core; and an outer cladding enclosing the inner cladding and having a refractive index which is smaller than the refractive index of the core and larger than the refractive index of the inner cladding, whereas the bend radius Rt is 25 mm or less when ? ? ? ( R ) ? R is the minimum, the bend loss at the bend radius R being ?(R).
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: March 22, 2016
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Yuki Kawaguchi, Yoshinori Yamamoto
  • Patent number: 9223085
    Abstract: An optical fiber for transmitting laser beams includes at least one fiber core, at least one fiber jacket, a sheath encompassing the fiber jacket, an interlayer between the fiber jacket and the sheath, in which the refractive index of the interlayer is lower than a refractive index of the corresponding fiber jacket that is in contact with the interlayer, and an outputting means for outputting leakage radiation from the fiber.
    Type: Grant
    Filed: October 30, 2012
    Date of Patent: December 29, 2015
    Assignee: TRUMPF LASER GMBH
    Inventors: Rudolf Huber, Stefan Fuchs, Alexander Killi
  • Patent number: 9213179
    Abstract: According to one embodiment, a display device includes a light source, a light guide, a light extraction unit, and a drive circuit. The light source emits a first light. The light guide has a first end, a second end arranged in a first direction, and a side surface extending in the first direction. The light guide guides the first light from the first end toward the second end. The light extraction unit opposes the side surface, and includes first and second conductive units provided parallel to the side surface. The light extraction unit extracts the first light guided inside the light guide by coming close to the side surface for a state in which a voltage is applied to the first and second conductive units. The drive circuit applies the voltage between the first and second conductive units.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: December 15, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yutaka Nakai, Tsuyoshi Hioki
  • Patent number: 9207395
    Abstract: A LMA, single-mode optical fiber comprises a core region, an inner cladding region surrounding the core region, and an outer cladding region surrounding the inner cladding region. The inner cladding region is configured to provide bend compensation. In one embodiment the index profile of the inner cladding region is graded with a slope of ?ncore/Rb, where ncore is the refractive index of the core region, Rb is the bend radius, and ?=0.6-1.2. In addition, the inner cladding is annular and the ratio of its outer radius to its inner radius is greater than 2. In a preferred embodiment this ratio is greater than 3. The overall index profile may be symmetric or asymmetric.
    Type: Grant
    Filed: December 5, 2011
    Date of Patent: December 8, 2015
    Assignee: OFS FITEL, LLC
    Inventors: John M Fini, Jeffrey W Nicholson
  • Patent number: 9197030
    Abstract: According to some embodiments a few moded optical fiber includes a glass core structured to provide light amplification at an amplification wavelength and a cladding surrounding the core. According to some embodiments the core of the few moded optical fiber includes a portion that has an average concentration of rare earth dopant which is lower by at least 30%, and preferably by at least 50%, than the average concentration of the rare earth dopant at another portion of the core that is situated further from the core center.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: November 24, 2015
    Assignee: Corning Incorporated
    Inventors: Kevin Wallace Bennett, Konstantin Sergeevich Koreshkov, Andrey Evgenievich Korolev, Dmitri Vladislavovich Kuksenkov, Ming Jun Li, Vladimir Nikolaevich Nazarov
  • Patent number: 9188735
    Abstract: An optical fiber (1) includes (i) an inner core (111) whose refractive index distribution has an ? profile, (ii) an outer core (112) which surrounds the inner core (111), and (iii) a clad (12) which surrounds the outer core (112). In the optical fiber (1), Rd is set to not less than 0.15, where Rd is a ratio of a refractive index difference between the outer core (112) and the clad (12) to a refractive index difference between a center part of the inner core (111) and the clad (12).
    Type: Grant
    Filed: May 6, 2013
    Date of Patent: November 17, 2015
    Assignees: FUJIKURA LTD., OSAKA PREFECTURE UNIVERSITY PUBLIC CORPORATION
    Inventors: Ryo Maruyama, Nobuo Kuwaki, Shoichiro Matsuo, Masaharu Ohashi
  • Patent number: 9176278
    Abstract: A broadband spectral power generator in a multimode optical fiber utilizes a standard multimode fiber that is coiled. A plate is placed on the coiled fiber and a force is applied to compresses the coiled fiber and thereby increase the interactions between the compressed windings and induce modal mixing and birefringence in the fiber. In addition, the compression causes additional non-linear processes to be excited and occur in the compressed fiber coil to generate more broadband light. This allows for better “mixing” of the spatial beam in the multimode fiber coil and allows for the various modes to overlap. The multimode fiber coil is made of silica, silicate, germinate, phosphate, fluoride, chalcogenide, or telluride. The compressed coiled fiber may be driven by a laser providing more than one wavelength output and this greatly increases the amount of nonlinear mixing in the fiber for a greatly enhanced spectral coverage.
    Type: Grant
    Filed: August 22, 2012
    Date of Patent: November 3, 2015
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: David P. Kelly, Peter A. Ketteridge, Daniel J. Creeden, Benjamin R. Johnson
  • Patent number: 9172461
    Abstract: Various embodiments provide for detection of tapping of an optical signal. In one embodiment an optical fiber includes a cladding region and first and second core regions. The first core region has a first core medium having a first mode-dependent loss (MDL) figure of merit. The second core region has a second core medium having a second different MDL figure of merit. Tapping of the optical signal may be determined to occur when the MDL of the first and second optical signals differs by a predetermined threshold value.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: October 27, 2015
    Assignee: Alcatel Lucent
    Inventors: Peter J. Winzer, Kyle C. Guan, Emina Soljanin
  • Patent number: 9164230
    Abstract: A high-powered double cladding (DC) pumped Ytterbium-free L-band Erbium doped fiber amplifier (EDFA) for dense-wavelength-division multiplexing (DWDM) is disclosed. The DC pumped Ytterbium-free L-band EDFA comprises a length of DC Erbium-doped fiber (EDF) that has a low-index, large-diameter core. For some embodiments, the DC-EDF also comprises a trench that is located radially exterior to the cladding, thereby increasing cladding absorption while still effectively maintaining single-mode behavior.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: October 20, 2015
    Assignee: OFS FITEL, LLC
    Inventor: Benyuan Zhu
  • Patent number: 9151887
    Abstract: Multi-core optical fibers are disclosed herein. According to one embodiment, a multi-core optical fiber includes a common outer cladding formed from silica-based glass and having a cladding index of refraction ncl. At least one single mode core element may be disposed in the common outer cladding. The at least one single mode core element may have a maximum index of refraction n1 sm. In addition, at least one multimode core element may be disposed in the common outer cladding, the at least one multimode core element having a maximum index of refraction n1 mm. The maximum refractive index n1 sm of the at least one single mode core element may be greater than the cladding index of refraction ncl, the maximum refractive index n1 mm of the at least one multi-mode core element may be greater than ncl, and a center-to-center spacing between adjacent core elements is greater than or equal to 25 ?m.
    Type: Grant
    Filed: September 4, 2013
    Date of Patent: October 6, 2015
    Assignee: Corning Incorporated
    Inventors: Brett Jason Hoover, Ming-Jun Li
  • Patent number: 9116279
    Abstract: Certain embodiments of the invention may include optimized trench-assisted ultra large area (ULA) optical fibers. According to an example embodiment of the invention, a trench-assisted optical fiber, optimized for microbend frontier (MBF) performance is provided. The optical fiber includes a core region having a longitudinal axis, a shelf region surrounding said core region, a cladding region surrounding said shelf region, said core and shelf and cladding regions configured to support and guide the propagation of signal light in a fundamental transverse mode in said core and shelf regions in the direction of said axis. The optical fiber further includes a core effective area (Aeff) of between 135 ?m2 and about 170 ?m2; a relative effective index difference (Neff) of greater than about 0.08%; a loss at 1550 nm of less than 0.180 dB/km; and a microbend frontier (MBF) distance of less than about 90%.
    Type: Grant
    Filed: February 24, 2014
    Date of Patent: August 25, 2015
    Inventors: Robert L Lingle, Jr., David W Peckham
  • Patent number: 9081129
    Abstract: A multi-core fiber includes an even number of six or more of cores and a clad that surrounds the outer circumferential surfaces of the cores. The cores are formed of two types of cores and in which an effective refractive index difference in a fundamental mode is 0.002 or less in a predetermined range or more that the effective refractive index difference in the fundamental mode is varied according to a core pitch. Two types of the cores are alternately and annularly disposed at regular spacings. A difference in the mode field diameter of light propagating through the cores is 1 ?m or less.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: July 14, 2015
    Assignees: FUJIKURA LTD., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY
    Inventors: Shoichiro Matsuo, Kunimasa Saitoh, Masanori Koshiba
  • Patent number: 9057813
    Abstract: An optical fiber of the invention satisfies ?core>?ic>?tmax>?tmin, ?0.15%??tmax>?tmin??0.7%, and 0.45?(rtmax?rin)/(rout?rin)?0.9 where the relative refractive index difference of the core is ?core, the relative refractive index difference of the internal cladding coat is ?ic, the relative refractive index difference of a highest refractive index layer in the trench coating is ?tmax, the relative refractive index difference of a lowest refractive index layer in the trench coating is ?tmin, the radius of an internal edge of the trench coating is rin, the radius of an external edge of the trench coating is rout, and the radius of an internal edge of a highest refractive index layer in the trench coating is rtmax and where the relative refractive index differences are based on a refractive index of the outermost cladding coat.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: June 16, 2015
    Assignee: FUJIKURA LTD.
    Inventors: Mamoru Sato, Shoichiro Matsuo
  • Patent number: 9036998
    Abstract: An undersea long-haul transmission system includes an optical fiber transmission span and a coherent detection and digital signal processing module for providing dispersion compensation. The transmission span includes at least one fiber pair comprising substantially equal lengths of a positive-dispersion first fiber and a negative-dispersion second fiber that are configured to provide a signal output at transmission distances greater than 10,000 km, in which the combined accumulated dispersion across the operating bandwidth does not exceed the dispersion-compensating capacity of the coherent detection and digital signal processing module. Further described is a fiber for use in an undersea long-haul transmission span. At a transmission wavelength of 1550 nm, the fiber has a dispersion coefficient in the range of ?16 to ?25 ps/nm·km, and a dispersion slope in the range of 0.04 to 0.02 ps/nm2·km.
    Type: Grant
    Filed: August 16, 2013
    Date of Patent: May 19, 2015
    Assignee: OFS FITEL, LLC
    Inventor: Ole A Levring
  • Patent number: 9031099
    Abstract: An optical active fiber is configured with an asymmetrically-shaped core having at least one long axis and a shortest axis which extends transversely to the long axis. The outmost cladding of the active fiber is configured with a marking indicating the orientation of the short axis. The marking allows for bending the fiber so that the shortest axis extends along and lies in the plane of the bend thereby minimizing distortion of a mode which is guided by the asymmetrically-shaped core as light propagates along the bend.
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: May 12, 2015
    Assignee: IPG Photonics Corporation
    Inventors: Valentin I Gapontsev, Mikhail Vyatkin, Vladimir Sergueev, Dan Myasnikov, Ilya Zaytsev
  • Patent number: 9031371
    Abstract: The present invention relates to a GI-type multi-mode optical fiber in which the outer diameter of the core is 47.5 to 52.5 ?m or 60 to 65 ?m, or to a bend resistant multi-mode optical fiber provided with resistance against property fluctuation caused by the bending of the multi-mode optical fiber by providing a trench portion having a low refractive index at the outer periphery of the core. In the multi-mode optical fiber, both the maximum tensile stress and the maximum compressive stress in the optical axis direction remaining in the core are 50 MPa or less.
    Type: Grant
    Filed: May 8, 2012
    Date of Patent: May 12, 2015
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Kazuhiro Yonezawa, Sumio Hoshino
  • Patent number: 9025925
    Abstract: A radiation-resistant optical fiber includes at least one core and at least one first cladding surrounding the core. The core includes a phosphosilicate matrix, the core being rare-earth doped, the rare earth being chosen from erbium, ytterbium, neodymium, thulium or erbium-ytterbium of thulium-holmium codoped and the core is cerium codoped. Also described is a method for radiation-hardening an optical fiber including the core having a phosphosilicate matrix, the core being rare-earth doped, the rare earth being chosen from erbium, ytterbium, neodymium and thulium, or erbium-ytterbium or thulium-holmium codoped, and including a step of cerium codoping the core of the fiber.
    Type: Grant
    Filed: July 8, 2011
    Date of Patent: May 5, 2015
    Assignees: Ixblue, Commissariat a l'Energie Atomique et aux Energies Alternatives
    Inventors: Benoôt Cadier, Arnaud Laurent, Thierry Robin, Sylvain Girard, Claude Marcandella
  • Publication number: 20150117473
    Abstract: According to an embodiment of the disclosure, a system for producing a higher power laser beam is provided. The system includes an optical fiber having a length. The optical fiber is configured to receive inputs from multiple laser pumps and an input from a Stokes seed laser pump. The optical fiber has a core that is doped. The core, when viewed from a cross-section of the optical fiber, has a higher concentration of doping at a location near an axis of the optical fiber than a location further from the axis of the optical fiber. The optical fiber is also configured to convert pump power to Stokes power along the length of the optical fiber when subjected to a Stimulated Raman Scattering (SRS) process.
    Type: Application
    Filed: October 30, 2013
    Publication date: April 30, 2015
    Applicant: Raytheon Company
    Inventors: David A. Rockwell, Vladimir V. Shkunov
  • Patent number: 9014525
    Abstract: A trench-assisted, multimode optical fiber includes a central core having an alpha refractive index profile with respect to an outer cladding. The optical fiber also includes an inner cladding, a depressed trench, and an outer cladding. The optical fiber achieves reduced bending losses and a high bandwidth.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: April 21, 2015
    Assignee: Draka Comteq, B.V.
    Inventors: Denis Molin, Pierre Sillard, Marianne Bigot-Astruc
  • Patent number: 9014523
    Abstract: A large mode field active optical fiber and manufacture method thereof is provided. The large mode field active optical fiber is formed by drawing a fiber core (1), a quartz glass internal cladding (2), a quartz glass outer cladding (3), and a coating (4). The quartz glass internal cladding (2), the quartz glass outer cladding (3), and the coating (4) are sequentially coated on the outer surface of the fiber core (1). The fiber core (1) is formed by depositing, melting, and shrinking the tetrachlorosilane doped with rare earth ions in a quartz glass tube. The refractive index of the fiber core (1) is a graded refractive index, and the section parameter a thereof is 1???3. The appearance of the quartz glass inner cladding (2) is regular multi-prism shaped.
    Type: Grant
    Filed: November 24, 2010
    Date of Patent: April 21, 2015
    Assignee: Fiberhome Telecommunications Technologies Co., Ltd.
    Inventors: Wei Chen, Shiyu Li, Daoyu Lei, Dongxiang Wang, Wenyong Luo, Wenjun Huang, Fuming Hu, Peng Hu
  • Publication number: 20150104141
    Abstract: Light diffusing optical fibers for use in ultraviolet illumination applications and which have a uniform color gradient that is angularly independent are disclosed herein along with methods for making such fibers. The light diffusing fibers are composed of a silica-based glass core that is coated with a number of layers including a scattering layer.
    Type: Application
    Filed: December 19, 2014
    Publication date: April 16, 2015
    Inventors: Stephan Lvovich Logunov, Paul John Shustack
  • Patent number: RE45512
    Abstract: Apparatus and method are provided for transmitting at least one electro-magnetic radiation is provided. In particular, at least one optical fiber having at least one end extending along a first axis may be provided. Further, a light transmissive optical arrangement may be provided in optical cooperation with the optical fiber. The optical arrangement may have a first surface having a portion that is perpendicular to a second axis, and a second surface which includes a curved portion. The first axis can be provided at a particular angle that is more than 0° and less than 90° with respect to the second axis.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: May 12, 2015
    Assignee: The General Hospital Corporation
    Inventors: Guillermo J. Tearney, Milen Shishkov, Brett E. Bouma