Patents by Inventor Hidenobu Muranaka

Hidenobu Muranaka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220385373
    Abstract: A wavelength converter includes an optical waveguide substrate configured to include a plurality of optical waveguides formed with different design values, an incidence-side optical fiber from which signal light and excitation light are incident to the optical waveguide substrate, and an emission-side optical fiber to which light including converted light having a wavelength different from a wavelength of the signal light is extracted from the optical waveguide substrate, wherein the incidence-side optical fiber and the emission-side optical fiber are optically coupled to one optical waveguide among the plurality of optical waveguides.
    Type: Application
    Filed: March 3, 2022
    Publication date: December 1, 2022
    Applicant: FUJITSU LIMITED
    Inventors: Hidenobu MURANAKA, Tomoaki TAKEYAMA, Takeshi HOSHIDA
  • Patent number: 9983367
    Abstract: An optical module for connecting between an optical fiber and a photoelectric conversion device mounted on a printed circuit board includes a main body made of transmissive material and having a slanted face and a bottom face, the slanted face being at an angle to the bottom face, a reception-purpose lens, and a transmission-purpose lens, wherein the slanted face serves as a mirror on an optical path extending in the main body between the reception-purpose lens and the transmission-purpose lens.
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: May 29, 2018
    Assignees: FUJITSU COMPONENT LIMITED, FUJITSU LIMITED
    Inventors: Hongfei Zhang, Osamu Daikuhara, Hidenobu Muranaka
  • Patent number: 9696504
    Abstract: An electronic apparatus includes a substrate and an optical connector connected to a waveguide on the substrate. The optical connector includes a ferrule that holds an optical fiber and has front and rear parts along a connecting direction of the optical connector with respect to the substrate. The ferrule has a hook and a presser member provided on a bottom face at the front part of the ferrule, a projection provided on the bottom face at the rear part of the ferrule, and a sloping part including a groove formed in the bottom face to hold the optical fiber. The optical fiber is held obliquely downward toward the substrate by the sloping part. The substrate has holes to receive the hook and the projection, and a groove to receive the optical fiber.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: July 4, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Tsuyoshi Aoki, Shigenori Aoki, Hidenobu Muranaka
  • Publication number: 20170097483
    Abstract: An optical connector includes at least one optical fiber, and a ferrule configured to hold the optical fiber. In the optical connector, the ferrule has a hook and a presser member on a front part of a bottom face of the ferrule, and a projection on a rear part of the bottom face of the ferrule, in a connecting direction, and the optical fiber is held obliquely downward from a rear end of the ferrule toward the presser member of the ferrule.
    Type: Application
    Filed: December 14, 2016
    Publication date: April 6, 2017
    Applicant: FUJITSU LIMITED
    Inventors: Tsuyoshi Aoki, Shigenori Aoki, Hidenobu Muranaka
  • Patent number: 9612405
    Abstract: An optical connector includes at least one optical fiber, and a ferrule configured to hold the optical fiber. In the optical connector, the ferrule has a hook and a presser member on a front part of a bottom face of the ferrule, and a projection on a rear part of the bottom face of the ferrule, in a connecting direction, and the optical fiber is held obliquely downward from a rear end of the ferrule toward the presser member of the ferrule.
    Type: Grant
    Filed: September 1, 2014
    Date of Patent: April 4, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Tsuyoshi Aoki, Shigenori Aoki, Hidenobu Muranaka
  • Publication number: 20170090131
    Abstract: An optical module for connecting between an optical fiber and a photoelectric conversion device mounted on a printed circuit board includes a main body made of transmissive material and having a slanted face and a bottom face, the slanted face being at an angle to the bottom face, a reception-purpose lens, and a transmission-purpose lens, wherein the slanted face serves as a mirror on an optical path extending in the main body between the reception-purpose lens and the transmission-purpose lens.
    Type: Application
    Filed: September 12, 2016
    Publication date: March 30, 2017
    Inventors: Hongfei Zhang, Osamu Daikuhara, Hidenobu Muranaka
  • Patent number: 9116309
    Abstract: An optical connector includes an optical fiber, and a ferrule configured to hold the optical fiber, wherein the ferrule has a front part, a rear part, a deformable mechanism to connect between the front part and the rear part, and an opening to allow the optical fiber to bend along with displacement of the deformable mechanism, and wherein the deformable mechanism has a restrictor to restrict the displacement or deformation of the deformable mechanism, the restrictor being provided at least between the deformable mechanism and the front part or between the deformable mechanism and the rear part.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: August 25, 2015
    Assignees: FUJITSU LIMITED, FURUKAWA ELECTRIC CO., LTD.
    Inventors: Tsuyoshi Aoki, Shigenori Aoki, Hidenobu Muranaka, Katsuki Suematsu, Mitsuhiro Iwaya
  • Patent number: 9025917
    Abstract: An optical connector includes: a holding member that holds an optical transmission line; a lens member that has a lens; a concavo-convex structure provided between the holding member and the lens member; and a moving member that moves the concavo-convex structure between a first state where a protrusion and a recess of the concavo-convex structure are engaged with each other and a second state where a gap is formed between the protrusion and the recess.
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: May 5, 2015
    Assignee: Fujitsu Limited
    Inventors: Tsuyoshi Aoki, Shigenori Aoki, Hidenobu Muranaka
  • Publication number: 20150117821
    Abstract: An optical connector includes at least one optical fiber, and a ferrule configured to hold the optical fiber. In the optical connector, the ferrule has a hook and a presser member on a front part of a bottom face of the ferrule, and a projection on a rear part of the bottom face of the ferrule, in a connecting direction, and the optical fiber is held obliquely downward from a rear end of the ferrule toward the presser member of the ferrule.
    Type: Application
    Filed: September 1, 2014
    Publication date: April 30, 2015
    Inventors: Tsuyoshi Aoki, Shigenori Aoki, Hidenobu Muranaka
  • Patent number: 8920042
    Abstract: An optical connector includes a fiber holder with guide holes for guiding optical fibers, a space communicating with the guide holes and to accommodate the optical fibers, and a deformable member that forms at least a part of the fiber holder and causes the space to deform or displace to allow a part or all of the optical fibers to bend in the space.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: December 30, 2014
    Assignees: Fujitsu Limited, Furukawa Electric Co., Ltd.
    Inventors: Tsuyoshi Aoki, Shigenori Aoki, Hidenobu Muranaka, Mitsuhiro Iwaya, Tsunetoshi Saito, Katsuki Suematsu
  • Publication number: 20140363129
    Abstract: An optical connector includes an optical fiber, and a ferrule configured to hold the optical fiber, wherein the ferrule has a front part, a rear part, a deformable mechanism to connect between the front part and the rear part, and an opening to allow the optical fiber to bend along with displacement of the deformable mechanism, and wherein the deformable mechanism has a restrictor to restrict the displacement or deformation of the deformable mechanism, the restrictor being provided at least between the deformable mechanism and the front part or between the deformable mechanism and the rear part.
    Type: Application
    Filed: May 28, 2014
    Publication date: December 11, 2014
    Applicants: FUJITSU LIMITED, FURUKAWA ELECTRIC CO., LTD.
    Inventors: Tsuyoshi Aoki, Shigenori Aoki, Hidenobu Muranaka, Katsuki Suematsu, Mitsuhiro Iwaya
  • Patent number: 8876412
    Abstract: An optical connector includes a fiber holder to hold optical fibers; a housing to accommodate the optical fibers and the fiber holder; and a thermally driven actuator to displace at least a part of the fiber holder upon application of heat from a first position at which the fiber holder is retracted inside the housing to a second position that allows the optical fibers to be optically coupled to a counterpart connector.
    Type: Grant
    Filed: July 30, 2012
    Date of Patent: November 4, 2014
    Assignee: Fujitsu Limited
    Inventors: Tsuyoshi Aoki, Shigenori Aoki, Hidenobu Muranaka
  • Publication number: 20140079354
    Abstract: A method for producing an optical connector includes making only the core jut spherically from an end facet of an optical fiber by arc discharge, the optical fiber having a difference in index of refraction between a core and a clad at 1% to 3% by adding dopant that increases an index of refraction of the core and lowers a melting point of the core, and mounting the optical fiber processed by the arc discharge in a ferrule.
    Type: Application
    Filed: July 25, 2013
    Publication date: March 20, 2014
    Applicant: FUJITSU LIMITED
    Inventors: Tsuyoshi Aoki, Shigenori Aoki, Hidenobu Muranaka
  • Publication number: 20130084045
    Abstract: An optical connector includes a fiber holder to hold optical fibers; a housing to accommodate the optical fibers and the fiber holder; and a thermally driven actuator to displace at least a part of the fiber holder upon application of heat from a first position at which the fiber holder is retracted inside the housing to a second position that allows the optical fibers to be optically coupled to a counterpart connector.
    Type: Application
    Filed: July 30, 2012
    Publication date: April 4, 2013
    Applicant: FUJITSU LIMITED
    Inventors: Tsuyoshi AOKI, Shigenori Aoki, Hidenobu Muranaka
  • Publication number: 20130071063
    Abstract: An optical connector includes: a holding member that holds an optical transmission line; a lens member that has a lens; a concavo-convex structure provided between the holding member and the lens member; and a moving member that moves the concavo-convex structure between a first state where a protrusion and a recess of the concavo-convex structure are engaged with each other and a second state where a gap is formed between the protrusion and the recess.
    Type: Application
    Filed: June 27, 2012
    Publication date: March 21, 2013
    Applicant: FUJITSU LIMITED
    Inventors: Tsuyoshi AOKI, Shigenori Aoki, Hidenobu Muranaka
  • Publication number: 20120237168
    Abstract: An optical connector includes a fiber holder with guide holes for guiding optical fibers, a space communicating with the guide holes and to accommodate the optical fibers, and a deformable member that forms at least a part of the fiber holder and causes the space to deform or displace to allow a part or all of the optical fibers to bend in the space.
    Type: Application
    Filed: January 27, 2012
    Publication date: September 20, 2012
    Applicants: FURUKAWA ELECTRIC CO., LTD., FUJITSU LIMITED
    Inventors: Tsuyoshi AOKI, Shigenori AOKI, Hidenobu MURANAKA, Mitsuhiro IWAYA, Tsunetoshi SAITO, Katsuki SUEMATSU
  • Patent number: 7034750
    Abstract: A chip-like printed antenna in which an open end is formed by at least two antenna conductors separated from each other is mounted on a printed-circuit board. A ground required by one or plural other modules is disposed and mounted on the printed-circuit board so as to surround a remaining area of a surrounding area of the printed antenna except a partial area as indicated by oblique line parts. By this, in the printed-circuit board , a radiation electric field does not come to have a dipole mode, but is formed into a balloon shape and is radiated in one direction as indicated by a broken line.
    Type: Grant
    Filed: October 27, 2003
    Date of Patent: April 25, 2006
    Assignees: Sony Corporation, Sony Chemicals Corporation
    Inventors: Kenji Asakura, Hidenobu Muranaka, Shuichiro Yasuda
  • Patent number: 6940458
    Abstract: A PDA includes a printed-circuit board on which at least one printed antenna pair having two chip-like printed antennas, which receive linearly polarized signals and are disposed along axes orthogonal to each other, is mounted. In each of the printed antennas, an open end is formed of at least two antenna conductors separated from each other. Besides, in the printed-circuit board, a ground required by one or plural other modules is disposed so as to surround a surrounding area of at least three sides of four sides forming a rectangular section in each of the printed antennas, and each of the printed antennas is disposed and mounted so that a remaining one side faces an edge portion of the printed-circuit board. While the PDA can receive circularly polarized signals very effectively, the degree of freedom in layout is greatly expanded and miniaturization can be realized.
    Type: Grant
    Filed: November 25, 2003
    Date of Patent: September 6, 2005
    Assignee: Sony Chemicals Corporation Neagari Plant
    Inventors: Kouichi Mukai, Shuichiro Yasuda, Kenji Asakura, Hidenobu Muranaka
  • Publication number: 20040145528
    Abstract: A PDA includes a printed-circuit board on which at least one printed antenna pair having two chip-like printed antennas, which receive linearly polarized signals and are disposed along axes orthogonal to each other, is mounted. In each of the printed antennas, an open end is formed of at least two antenna conductors separated from each other. Besides, in the printed-circuit board, a ground required by one or plural other modules is disposed so as to surround a surrounding area of at least three sides of four sides forming a rectangular section in each of the printed antennas, and each of the printed antennas is disposed and mounted so that a remaining one side faces an edge portion of the printed-circuit board. While the PDA can receive circularly polarized signals very effectively, the degree of freedom in layout is greatly expanded and miniaturization can be realized.
    Type: Application
    Filed: November 25, 2003
    Publication date: July 29, 2004
    Inventors: Kouichi Mukai, Shuichiro Yasuda, Kenji Asakura, Hidenobu Muranaka
  • Publication number: 20040119653
    Abstract: A chip-like printed antenna in which an open end is formed by at least two antenna conductors separated from each other is mounted on a printed-circuit board. A ground required by one or plural other modules is disposed and mounted on the printed-circuit board so as to surround a remaining area of a surrounding area of the printed antenna except a partial area as indicated by oblique line parts. By this, in the printed-circuit board, a radiation electric field does not come to have a dipole mode, but is formed into a balloon shape and is radiated in one direction as indicated by a broken line.
    Type: Application
    Filed: October 27, 2003
    Publication date: June 24, 2004
    Inventors: Kenji Asakura, Hidenobu Muranaka, Shuichiro Yasuda