Patents Examined by Guy G. Anderson
  • Patent number: 10551576
    Abstract: An optical fiber fixing structure includes: a cylindrical member; an optical fiber inserted into a hole of the cylindrical member; and a fixing material configured to fix the cylindrical member and the optical fiber, wherein the optical fiber is a polarization maintaining optical fiber having a polarization axis, and a center of the optical fiber is arranged so as to be eccentric to a center of the hole, and an angle formed by an eccentric direction connecting the center of the hole and the center of the optical fiber and the polarization axis is ?22.5° to 22.5°, or 67.5° to 112.5°.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: February 4, 2020
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Kazuki Yamaoka, Jun Miyokawa, Masakazu Miura, Toshio Kimura
  • Patent number: 10345139
    Abstract: Embodiments of the present invention address aliasing problems by providing a plurality of discrete acoustic sensors along a cable whereby acoustic signals may be measured in situations where the fiber optic cable has not been secured to a structure or area by a series of clamps. Acoustic sampling points are achieved by selectively enhancing the acoustic coupling between the outer layer and the at least one optical fiber arrangement, such that acoustic energy may be transmitted selectively from the outer layer to the at least one optical fiber arrangement. The resulting regions of acoustic coupling along the cable allow the optical fiber to detect acoustic signals. Regions between the outer layer and the at least one optical fiber arrangement that contain material which is acoustically insulating further this enhancement since acoustic waves are unable to travel through such mediums, or at least travel through such mediums at a reduced rate.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: July 9, 2019
    Assignee: Silixa Ltd.
    Inventors: Mahmoud Farhadiroushan, Daniel Finfer, Dmitry Strusevich, Sergey Shatalin, Tom Parker
  • Patent number: 10317608
    Abstract: A lighting device comprises a body of optically transmissive material exhibiting a total internal reflection characteristic, the body further comprising a light input surface for receiving light, a light extraction portion spaced from the light input surface, a light transmission portion disposed between the light input surface and the light extraction portion, and at least one light deflection surface for deflecting light toward the light extraction portion. Further in accordance with this aspect the light extraction portion comprises a first extraction surface for extracting light deflected by the at least one light deflection surface out of the body and a second extraction surface for extracting light other than light deflected by the at least one light deflection surface out of the body.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: June 11, 2019
    Assignee: Cree, Inc.
    Inventors: Jin Hong Lim, Curt Progl, Kurt Wilcox, Steve Wilcenski, Zongjie Yuan
  • Patent number: 10317710
    Abstract: A novel phase shifter design for carrier depletion based silicon modulators, based on an experimentally validated model, is described. It is believed that the heretofore neglected effect of incomplete ionization will have a significant impact on ultra-responsive phase shifters. A low V?L product of 0.3 V·cm associated with a low propagation loss of 20 dB/cm is expected to be observed. The phase shifter is based on overlapping implantation steps, where the doses and energies are carefully chosen to utilize counter-doping to produce an S-shaped junction. This junction has a particularly attractive V?L figure of merit, while simultaneously achieving attractively low capacitance and optical loss. This improvement will enable significantly smaller Mach-Zehnder modulators to be constructed that nonetheless would have low drive voltages, with substantial decreases in insertion loss. The described fabrication process is of minimal complexity; in particular, no high-resolution lithographic step is required.
    Type: Grant
    Filed: August 24, 2018
    Date of Patent: June 11, 2019
    Assignee: Elenion Technologies, LLC
    Inventors: Thomas Baehr-Jones, Yang Liu
  • Patent number: 10295746
    Abstract: An optical filter for attenuating higher-order modes in an optical waveguide includes a shoulder slab formed of a first material having a first index of refraction and disposed on a second material having a second index of refraction, the first index of refraction being higher than the second index of refraction. The shoulder slab defines a near end having a first width, an intermediate section, adjacent to the first end section, and a far end section, adjacent to the intermediate section and opposite the first end section along a direction of beam propagation. The optical filter also includes a waveguide ridge, formed of the first material and disposed atop the shoulder slab, that traverses the shoulder slab, and is configured to guide light of a fundamental mode along the direction of beam propagation from the near end section to the far end section.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: May 21, 2019
    Assignee: Skorpios Technologies, Inc.
    Inventors: Majid Sodagar, Murtaza Askari, Guoliang Li
  • Patent number: 10267995
    Abstract: In order to reduce a high frequency loss of a substrate-type optical waveguide without facilitating, in a low frequency domain, a reflection by an entrance end of a traveling-wave electrode, the substrate-type optical waveguide includes a coplanar line, provided on an upper surface of an upper cladding, which includes (i) a traveling-wave electrode connected to a P-type semiconductor region and (ii) an earth conductor connected to an N-type semiconductor region. The traveling-wave electrode and the earth conductor are provided so that a distance D therebetween decreases as a distance from an entrance end of the traveling-wave electrode increases.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: April 23, 2019
    Assignee: FUJIKURA LTD.
    Inventors: Shinichi Sakamoto, Kazuhiro Goi, Norihiro Ishikura
  • Patent number: 10243661
    Abstract: An apparatus includes a first and second VCSEL, each with an integrated lens. The VCSELs emit a first light beam having first optical modes at first wavelengths and a second light beam having second optical modes at second wavelengths. The apparatus also has an optical block with a first and second surface, a mirror coupled to the second surface, and a wavelength-selective filter coupled to the first surface. The first integrated lens mode matches the first beam to the optical block, and the second integrated lens mode matches the second beam to the optical block such that the first beam and second beam each have substantially a beam waist with a beam waist dimension at the first and second input region, respectively. An exit beam that includes light from the first beam and the second beam is output from the second surface of the optical block.
    Type: Grant
    Filed: August 15, 2014
    Date of Patent: March 26, 2019
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Wayne Sorin, Michael Renne Ty Tan, Sagi V Mathai, Georgios Panotopoulos, Paul K Rosenberg
  • Patent number: 10241379
    Abstract: In photonic integrated circuits implemented in silicon-on-insulator substrates, non-conductive channels formed, in accordance with various embodiments, in the silicon device layer and/or the silicon handle of the substrate in regions underneath radio-frequency transmission lines of photonic devices can provide breaks in parasitic conductive layers of the substrate, thereby reducing radio-frequency substrate losses.
    Type: Grant
    Filed: May 23, 2018
    Date of Patent: March 26, 2019
    Assignee: Aurrion, Inc.
    Inventors: John Parker, Gregory Alan Fish, Brian R. Koch
  • Patent number: 8025359
    Abstract: A protector for an ink cartridge container including a containing case body, an ink inlet for a recording head, a cartridge containing part into which an ink cartridge is removably insertable, and a door body capable of opening and closing an opening opposed to the ink inlet with the cartridge containing part sandwiched therebetween, the protector includes a protective cap unit including: a main body; a supporting rod protruded toward the ink inlet from the main body; a guiding funnel formed at a front edge of the supporting rod; and an elastic cap provided at an inner diametrical portion of the guiding funnel and capable of coming into close contact with the ink inlet, wherein: the protective cap unit is removable from and insertable into a containing case body; and the protective cap unit is formed as a different shape than that of the ink cartridge.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: September 27, 2011
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Hiroyasu Yano
  • Patent number: 8002372
    Abstract: A long-life pump capable of simultaneously conveying plural liquids and an inkjet printer having the pump are provided. The liquid pump includes: a liquid storage unit having liquid chambers trapping at least two types of liquids with each chamber corresponding to the type of the trapped liquid; a coupling member for connection to each liquid chamber of the liquid storage unit; a pressure adjusting mechanism, connected to the coupling member, for alternately switching between a negative pressure and a positive pressure of an internal pressure of the liquid chamber; an inlet valve capable of passing the liquid to the liquid chamber; an outlet valve discharging the liquid in the liquid chamber; and a pass resistance variable mechanism adjusting an amount of the liquid trapped in the liquid chamber depending on a level of the liquid in the liquid chamber.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: August 23, 2011
    Assignees: Ortek Corporation, Olympus Corporation
    Inventor: Masashi Matsuda
  • Patent number: 7997697
    Abstract: A droplet discharge head including a nozzle substrate having nozzle openings, a cavity substrate having discharge chambers that communicate with the nozzle openings and discharge droplets from the nozzle openings, a reservoir substrate having a reservoir concave portion that serves as a reservoir which communicates commonly with the discharge chambers. The reservoir substrate is provided between the nozzle substrate and the cavity substrate and a resin thin film is formed on a whole inner face of the reservoir concave portion and on a bottom face of a second concave portion. The second concave portion is provided in a peripheral of the reservoir concave portion and has a depth which is smaller than the depth of the reservoir concave portion. The resin thin film is cut circularly so as to surround the reservoir concave portion, and a part of the resin thin film serves as a diaphragm buffering pressure variation. serves as a diaphragm buffering pressure variation.
    Type: Grant
    Filed: October 4, 2007
    Date of Patent: August 16, 2011
    Assignee: Seiko Epson Corporation
    Inventors: Katsuji Arawaka, Kazufumi Oya
  • Patent number: 8000573
    Abstract: Generic tow lead-in for streamers providing communication between the seismic systems and the streamers, consisting of at least four wire power quad, at least four multimode optical fibers and at least one signal pair, where the at least one signal line do not utilize a screen.
    Type: Grant
    Filed: August 15, 2005
    Date of Patent: August 16, 2011
    Inventor: Phil Roscoe
  • Patent number: 7980654
    Abstract: Systems and methods are provided for calibrating a sensory array to ensure a robust cross-process registration measurement. The calibration is implemented using a calibration step that determines the signature error amount of a given image reading sensor. The signature error amount for the sensor is stored in a signature error look-up table. When the sensors are used to sense print head alignment, the correction may be implemented by accessing the signature error look-up table for the given sensor when calibrating the print heads. The signature error look-up table provides an amount of offset for each sensor that is used in determining the appropriate head position of a given print head to calibrate the print heads for the signature error associated with the given sensor.
    Type: Grant
    Filed: June 10, 2009
    Date of Patent: July 19, 2011
    Assignee: Xerox Corporation
    Inventors: Michael C. Mongeon, Howard Mizes, Helen Shin, Kenneth R. Ossman
  • Patent number: 7976124
    Abstract: An ink jet device including a plurality of ink channels that are arranged side by side and are covered by a flexible sheet, and a corresponding number of actuators are arranged to exert an actuating force onto the sheet through a bump that has a trapezoidal cross-sectional configuration wherein the bumps are formed on the sheet in such an orientation that their trapezoidal cross-section diverges towards the actuator, and the bumps are bonded to the actuators by means of an adhesive.
    Type: Grant
    Filed: August 9, 2007
    Date of Patent: July 12, 2011
    Assignee: Oce-Technologies B.V.
    Inventor: Jacobus J. M. Bisschop
  • Patent number: 7971947
    Abstract: An ink jet remanufacturing chip verifier for new ink jet chips attached to remanufactured ink jet cartridges includes a controller for verifying during the process of remanufacturing the ink jet cartridges: if the new ink jet chips attached to the remanufactured ink jet cartridges are new ink jet chips, if the new ink jet chips attached to the remanufactured ink jet cartridges were manufactured by a predetermined manufacturer of new ink jet chips, if the new ink jet chips attached to the remanufactured ink jet cartridges are functional, and if the new ink jet chips attached to the remanufacture ink jet cartridges are a predetermined type of new ink jet chip; the controller for rejecting during the process of remanufacturing the ink jet cartridges: ink jet chips attached to remanufactured ink jet cartridges which have been previously used, ink jet chips attached to remanufactured ink jet cartridges which produced by manufacturers other than the predetermined manufacturer of inkjet chips, inkjet chips attached
    Type: Grant
    Filed: April 7, 2008
    Date of Patent: July 5, 2011
    Assignee: Static Control Components, Inc.
    Inventor: Lynton R. Burchette
  • Patent number: 7967429
    Abstract: An ink tank includes a first channel extending in the form of a groove on an external part of the tank in connection with an atmospheric communicating port. The tank also includes a second channel which branches off from the first channel and joins this again and which has a capillary force greater than that of the first channel. Even when some amount of ink has flowed out of the atmospheric communicating port, the capillary force generated in the second channel acts to hold the ink in the channel. Additionally, even when ink is stored in the second channel, the first channel is not closed, and the pressure in the tank is therefore kept in equilibrium with the atmospheric pressure. Therefore, there is little possibility that the ink in the second channel will be pushed out even when the ambient temperature changes.
    Type: Grant
    Filed: January 29, 2009
    Date of Patent: June 28, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventor: Shogo Kawamura
  • Patent number: 7970241
    Abstract: A modulator includes an electro-optical substrate and a first and second waveguide formed of a doped semiconductor material positioned on a surface of an electro-optical substrate forming a slot therebetween. A doping level of the semiconductor material being chosen to make the first and second waveguide conductive. A dielectric material is positioned in the slot which increases confinement of both an optical field and an electrical field inside the slot. A refractive index of the semiconductor material and a refractive index of the dielectric material positioned in the slot being chosen to reduce the V?·L product of the modulator.
    Type: Grant
    Filed: September 9, 2008
    Date of Patent: June 28, 2011
    Assignee: Photonic Systems, Inc.
    Inventors: Jianxiao Chen, Charles Cox
  • Patent number: 7963642
    Abstract: An ink-jet printer, including: a recording head which ejects ink onto a recording medium; a main tank which stores the ink to be supplied to the recording head; a sub tank configured to be extended and contracted in a vertical direction and including first and second ink flow holes provided in a lower portion of the sub tank, such that the first ink flow hole communicates with the recording head while the second ink flow hole communicates with the main tank; and a communication tube which is connected, at one of opposite ends thereof, to the second ink flow hole and which has, at the other of opposite ends thereof, an opening positioned in an inside space of the sub tank, whereby the second ink flow hole and the inside space of the sub tank communicate with each other via the communication tube, wherein the communication tube is configured such that the opening of the communication tube is displaced downwardly in accordance with the contraction of the sub tank.
    Type: Grant
    Filed: May 28, 2008
    Date of Patent: June 21, 2011
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Takaichiro Umeda
  • Patent number: 7959255
    Abstract: A liquid droplet jetting apparatus includes a jetting head unit which has a nozzle which jets droplets of a liquid, and a heat generating section, a suction port which is formed in the jetting head unit, and which opens near the nozzle, and a suction device which sucks air around the nozzle from the suction port, and cools down the heat generating section of the jetting head unit by the air which is sucked. Since the heat generating portion is cooled down by the air sucked from the suction port by the suction device, it is possible to reduce a possibility of the heat of the heat generating section being transferred to the jetting head unit, and destabilizing an operation of the jetting head unit. Moreover, since the suction port opens near the nozzle, it is possible to suck fine liquid droplets together with air around the nozzle.
    Type: Grant
    Filed: May 13, 2008
    Date of Patent: June 14, 2011
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Tomoyuki Kubo
  • Patent number: 7957619
    Abstract: An all-fiber optical pulse compression arrangement comprises a concatenated arrangement of a section of input fiber (e.g., a single mode fiber), a graded-index (GRIN) fiber lens and a section of pulse-compressing fiber (e.g., LMA fiber). The GRIN fiber lens is used to provide mode matching between the input fiber (supporting the propagation of chirped optical pulses) and the pulse-compressing fiber, with efficient pulse compression occurring along the length of the LMA fiber. The dispersion and length of the LMA fiber section are selected to provide the desired degree of pulse compression; for example, capable of reconstituting a femtosecond pulse as is used in supercontinuum generation systems.
    Type: Grant
    Filed: October 26, 2010
    Date of Patent: June 7, 2011
    Assignee: OFS Fitel, LLC
    Inventors: Jeffrey W. Nicholson, Andrew D. Yablon