Patents by Inventor Hiroyasu Sasaki

Hiroyasu Sasaki 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).

  • Patent number: 11075500
    Abstract: An optical device includes a first substrate, having first and second surfaces, and a second substrate having a third surface. The first substrate includes: a laser unit, having an active layer and emitting light into the first substrate from the active layer; a reflecting mirror, having a plane obliquely intersecting an optical axis of light emitted from the laser unit, and being formed on the first surface so as to reflect the light toward the second surface; and a convex lens, being formed in a region on the second surface, the region including an optical axis of the light reflected by the reflecting mirror. The second substrate is provided with a grating coupler and an optical waveguide on the third surface, the optical waveguide having light incident on the grating coupler propagating therethrough.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: July 27, 2021
    Assignee: Lumentum Japan, Inc.
    Inventors: Hideo Arimoto, Koichiro Adachi, Misuzu Sagawa, Takanori Suzuki, Hiroyasu Sasaki
  • Patent number: 11022484
    Abstract: An optical receiver module includes: a lens array including a plurality of condenser lenses arranged in one direction to define a plane with optical axes in parallel to each other; and a light receiving element array including a plurality of light receiving elements each configured to receive light emitted from each of the condenser lenses. The light receiving element array includes: a semiconductor substrate to which the light from each of the condenser lenses is input and through which the light is transmitted; and light receiving portions each configured to receive the light transmitted through the semiconductor substrate and convert the light into an electrical signal. A shift of the optical axis of each of the condenser lenses from a center of each corresponding one of the light receiving portions is larger in a direction perpendicular to the one direction within the plane than in the one direction.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: June 1, 2021
    Assignee: Lumentum Japan, Inc.
    Inventors: Koki Iemura, Michihide Sasada, Hiroyasu Sasaki
  • Publication number: 20190036295
    Abstract: An optical device includes a first substrate, having first and second surfaces, and a second substrate having a third surface. The first substrate includes: a laser unit, having an active layer and emitting light into the first substrate from the active layer; a reflecting mirror, having a plane obliquely intersecting an optical axis of light emitted from the laser unit, and being formed on the first surface so as to reflect the light toward the second surface; and a convex lens, being formed in a region on the second surface, the region including an optical axis of the light reflected by the reflecting mirror. The second substrate is provided with a grating coupler and an optical waveguide on the third surface, the optical waveguide having light incident on the grating coupler propagating therethrough.
    Type: Application
    Filed: September 28, 2018
    Publication date: January 31, 2019
    Inventors: Hideo ARIMOTO, Koichiro ADACHI, Misuzu SAGAWA, Takanori SUZUKI, Hiroyasu SASAKI
  • Patent number: 10181694
    Abstract: An optical module includes a semiconductor optical device in which an active layer located at one side, an electrode located at the same side, and a mirror that reflects light toward the side opposite the electrode are monolithically integrated, a sub-mount having one surface on which a first wiring pattern is formed, a substrate in which an optical waveguide and a grating coupler are formed in a surface layer of the substrate, a spacer having an upper surface on which a second wiring pattern is formed, and a wire. The sub-mount is mounted on the spacer. The first wiring pattern on the sub-mount faces part of the second wiring pattern on the spacer and is electrically connected thereto. The second wiring pattern on the spacer includes a pad being disposed in a region exposed from the sub-mount and being bonded to the wire.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: January 15, 2019
    Assignee: Oclaro Japan, Inc.
    Inventors: Kohichi Robert Tamura, Takanori Suzuki, Mitsuo Akashi, Shigehisa Tanaka, Hiroaki Inoue, Hiroyasu Sasaki
  • Publication number: 20180340820
    Abstract: An optical receiver module includes: a lens array including a plurality of condenser lenses arranged in one direction to define a plane with optical axes in parallel to each other; and a light receiving element array including a plurality of light receiving elements each configured to receive light emitted from each of the condenser lenses. The light receiving element array includes: a semiconductor substrate to which the light from each of the condenser lenses is input and through which the light is transmitted; and light receiving portions each configured to receive the light transmitted through the semiconductor substrate and convert the light into an electrical signal. A shift of the optical axis of each of the condenser lenses from a center of each corresponding one of the light receiving portions is larger in a direction perpendicular to the one direction within the plane than in the one direction.
    Type: Application
    Filed: July 16, 2018
    Publication date: November 29, 2018
    Inventors: Koki IEMURA, Michihide SASADA, Hiroyasu SASAKI
  • Patent number: 10048117
    Abstract: An optical receiver module includes: a lens array including a plurality of condenser lenses arranged in one direction to define a plane with optical axes in parallel to each other; and a light receiving element array including a plurality of light receiving elements each configured to receive light emitted from each of the condenser lenses. The light receiving element array includes: a semiconductor substrate to which the light from each of the condenser lenses is input and through which the light is transmitted; and light receiving portions each configured to receive the light transmitted through the semiconductor substrate and convert the light into an electrical signal. A shift of the optical axis of each of the condenser lenses from a center of each corresponding one of the light receiving portions is larger in a direction perpendicular to the one direction within the plane than in the one direction.
    Type: Grant
    Filed: October 23, 2014
    Date of Patent: August 14, 2018
    Assignee: OCLARO JAPAN, INC.
    Inventors: Koki Iemura, Michihide Sasada, Hiroyasu Sasaki
  • Publication number: 20170365977
    Abstract: An optical module includes a semiconductor optical device in which an active layer located at one side, an electrode located at the same side, and a mirror that reflects light toward the side opposite the electrode are monolithically integrated, a sub-mount having one surface on which a first wiring pattern is formed, a substrate in which an optical waveguide and a grating coupler are formed in a surface layer of the substrate, a spacer having an upper surface on which a second wiring pattern is formed, and a wire. The sub-mount is mounted on the spacer. The first wiring pattern on the sub-mount faces part of the second wiring pattern on the spacer and is electrically connected thereto. The second wiring pattern on the spacer includes a pad being disposed in a region exposed from the sub-mount and being bonded to the wire.
    Type: Application
    Filed: August 30, 2017
    Publication date: December 21, 2017
    Inventors: Kohichi Robert TAMURA, Takanori SUZUKI, Mitsuo AKASHI, Shigehisa TANAKA, Hiroaki INOUE, Hiroyasu SASAKI
  • Patent number: 9762026
    Abstract: An optical module includes a semiconductor optical device in which an active layer located at one side, an electrode located at the same side, and a mirror that reflects light toward the side opposite the electrode are monolithically integrated, a sub-mount having one surface on which a first wiring pattern is formed, a substrate in which an optical waveguide and a grating coupler are formed in a surface layer of the substrate, a spacer having an upper surface on which a second wiring pattern is formed, and a wire. The sub-mount is mounted on the spacer. The first wiring pattern on the sub-mount faces part of the second wiring pattern on the spacer and is electrically connected thereto. The second wiring pattern on the spacer includes a pad being disposed in a region exposed from the sub-mount and being bonded to the wire.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: September 12, 2017
    Assignee: OCLARO JAPAN, INC.
    Inventors: Kohichi Robert Tamura, Takanori Suzuki, Mitsuo Akashi, Shigehisa Tanaka, Hiroaki Inoue, Hiroyasu Sasaki
  • Publication number: 20170054269
    Abstract: An optical module includes a semiconductor optical device in which an active layer located at one side, an electrode located at the same side, and a mirror that reflects light toward the side opposite the electrode are monolithically integrated, a sub-mount having one surface on which a first wiring pattern is formed, a substrate in which an optical waveguide and a grating coupler are formed in a surface layer of the substrate, a spacer having an upper surface on which a second wiring pattern is formed, and a wire. The sub-mount is mounted on the spacer. The first wiring pattern on the sub-mount faces part of the second wiring pattern on the spacer and is electrically connected thereto. The second wiring pattern on the spacer includes a pad being disposed in a region exposed from the sub-mount and being bonded to the wire.
    Type: Application
    Filed: August 18, 2016
    Publication date: February 23, 2017
    Inventors: Kohichi Robert TAMURA, Takanori SUZUKI, Mitsuo AKASHI, Shigehisa TANAKA, Hiroaki INOUE, Hiroyasu SASAKI
  • Publication number: 20160111852
    Abstract: An optical device includes a first substrate, having first and second surfaces, and a second substrate having a third surface. The first substrate includes: a laser unit, having an active layer and emitting light into the first substrate from the active layer; a reflecting mirror, having a plane obliquely intersecting an optical axis of light emitted from the laser unit, and being formed on the first surface so as to reflect the light toward the second surface; and a convex lens, being formed in a region on the second surface, the region including an optical axis of the light reflected by the reflecting mirror. The second substrate is provided with a grating coupler and an optical waveguide on the third surface, the optical waveguide having light incident on the grating coupler propagating therethrough.
    Type: Application
    Filed: December 16, 2015
    Publication date: April 21, 2016
    Inventors: Hideo ARIMOTO, Koichiro ADACHI, Misuzu SAGAWA, Takanori SUZUKI, Hiroyasu SASAKI
  • Patent number: 9244231
    Abstract: An optical device includes a first substrate, having first and second surfaces, and a second substrate having a third surface. The first substrate includes: a laser unit, having an active layer and emitting light into the first substrate from the active layer; a reflecting mirror, having a plane obliquely intersecting an optical axis of light emitted from the laser unit, and being formed on the first surface so as to reflect the light toward the second surface; and a convex lens, being formed in a region on the second surface, the region including an optical axis of the light reflected by the reflecting mirror. The second substrate is provided with a grating coupler and an optical waveguide on the third surface, the optical waveguide having light incident on the grating coupler propagating therethrough.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: January 26, 2016
    Assignee: OCLARO JAPAN, INC.
    Inventors: Hideo Arimoto, Koichiro Adachi, Misuzu Sagawa, Takanori Suzuki, Hiroyasu Sasaki
  • Publication number: 20150136957
    Abstract: An optical receiver module includes: a lens array including a plurality of condenser lenses arranged in one direction to define a plane with optical axes in parallel to each other; and a light receiving element array including a plurality of light receiving elements each configured to receive light emitted from each of the condenser lenses. The light receiving element array includes: a semiconductor substrate to which the light from each of the condenser lenses is input and through which the light is transmitted; and light receiving portions each configured to receive the light transmitted through the semiconductor substrate and convert the light into an electrical signal. A shift of the optical axis of each of the condenser lenses from a center of each corresponding one of the light receiving portions is larger in a direction perpendicular to the one direction within the plane than in the one direction.
    Type: Application
    Filed: October 23, 2014
    Publication date: May 21, 2015
    Inventors: Koki IEMURA, Michihide SASADA, Hiroyasu SASAKI
  • Publication number: 20140153605
    Abstract: An optical device includes a first substrate, having first and second surfaces, and a second substrate having a third surface. The first substrate includes: a laser unit, having an active layer and emitting light into the first substrate from the active layer; a reflecting mirror, having a plane obliquely intersecting an optical axis of light emitted from the laser unit, and being formed on the first surface so as to reflect the light toward the second surface; and a convex lens, being formed in a region on the second surface, the region including an optical axis of the light reflected by the reflecting mirror. The second substrate is provided with a grating coupler and an optical waveguide on the third surface, the optical waveguide having light incident on the grating coupler propagating therethrough.
    Type: Application
    Filed: November 27, 2013
    Publication date: June 5, 2014
    Applicant: Oclaro Japan, Inc.
    Inventors: Hideo ARIMOTO, Koichiro ADACHI, Misuzu SAGAWA, Takanori SUZUKI, Hiroyasu SASAKI
  • Patent number: 8000359
    Abstract: A laser device capable of preventing deterioration of a light signal and a controlling method therefor are provided.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: August 16, 2011
    Assignee: Opnext Japan, Inc.
    Inventors: Hiroyasu Sasaki, Hideo Arimoto
  • Patent number: 7733933
    Abstract: Included are: a gain chip having a gain unit and a phase control region; a current supply for causing a positive current to flow to the phase control region; a voltage supply for applying a bias voltage to the phase control region; and a control unit for selectively driving the current supply or the voltage supply depending on a direction of the wavelength shift. The control unit drives the current supply when a laser wavelength is to be shifted to a shorter wavelength side from a wavelength with the current supply and the voltage supply being turned off, and drives the voltage supply when the laser wavelength is to be shifted to a longer wavelength side from a wavelength with the current supply and the voltage supply being turned off.
    Type: Grant
    Filed: August 3, 2007
    Date of Patent: June 8, 2010
    Assignee: Opnext Japan, Inc.
    Inventors: Hideo Arimoto, Kazuhiro Ito, Hiroyasu Sasaki
  • Publication number: 20090262762
    Abstract: A laser device capable of preventing deterioration of a light signal and a controlling method therefor are provided.
    Type: Application
    Filed: December 11, 2008
    Publication date: October 22, 2009
    Inventors: Hiroyasu Sasaki, Hideo Arimoto
  • Patent number: 7520683
    Abstract: To provide a small-sized and reliable optical module in which a light emitting element and an optical function element respectively remarkably different in a coefficient of thermal expansion are mounted in the same casing, in the invention, the optical function element is mounted on the casing made of first material substantially equal in a coefficient of thermal expansion to the optical function element, a light emitting element unit including the light emitting element (for example, a thermoelectric module over which the light emitting element is mounted) is mounted on a member (base material) made of second material different from the first material and matched with the light emitting element unit in a coefficient of thermal expansion, and the member is, for example, embedded in the bottom of the casing.
    Type: Grant
    Filed: August 3, 2005
    Date of Patent: April 21, 2009
    Assignee: Opnext Japan, Inc.
    Inventors: Toshiaki Takai, Kenji Yoshimoto, Hiroyasu Sasaki, Masanobu Okayasu, Naoki Matsushima
  • Publication number: 20080291957
    Abstract: Included are: a gain chip having a gain unit and a phase control region; a current supply for causing a positive current to flow to the phase control region; a voltage supply for applying a bias voltage to the phase control region; and a control unit for selectively driving the current supply or the voltage supply depending on a direction of the wavelength shift. The control unit drives the current supply when a laser wavelength is to be shifted to a shorter wavelength side from a wavelength with the current supply and the voltage supply being turned off, and drives the voltage supply when the laser wavelength is to be shifted to a longer wavelength side from a wavelength with the current supply and the voltage supply being turned off.
    Type: Application
    Filed: August 3, 2007
    Publication date: November 27, 2008
    Inventors: Hideo ARIMOTO, Kzuhiro ITO, Hiroyasu SASAKI
  • Patent number: 7038866
    Abstract: The present invention provides a compact, highly reliable optical module in which a light-emitting element and optical modulator element that differ from each other in thermal expansion coefficient are mounted in one casing. In the optical module having a differential thermal expansion coefficient less than 5×10?6 [1/K] between the light-emitting element and the casing, and a differential thermal expansion coefficient of at least 5×10?6 [1/K] between the optical modulator element and the casing, a section at which the optical modulator element and the casing are fixed is equal to or less than 10 mm wide in the direction of an optical axis.
    Type: Grant
    Filed: May 12, 2005
    Date of Patent: May 2, 2006
    Assignee: Opnext Japan, Inc.
    Inventors: Kenji Yoshimoto, Hiroyasu Sasaki, Masanobu Okayasu, Toshiaki Takai, Naoki Matsushima
  • Patent number: 7037000
    Abstract: The present invention provides an optical transmission module comprising: a laser diode; a lens for condensing a laser beam from the laser diode; a fiber ferrule which is placed so that the laser beam condensed by the lens can enter a fiber core; and a lens aperture or a lens aperture portion which is provided at one of the lens itself, a position before the lens and a position after the lens. In addition, the present invention provides an optical transmission module in which instead of the lens aperture, an effective diameter of the lens on the fiber ferrule side is set at a value ranging from 0.1 times to less than 0.2 times of a distance between an emittance plane of the lens and an incidence plane of the fiber ferrule.
    Type: Grant
    Filed: July 30, 2003
    Date of Patent: May 2, 2006
    Assignee: OpNext Japan, Inc.
    Inventors: Hiroaki Furuichi, Hiroyasu Sasaki, Kazumi Kawamoto