Patents by Inventor Shoichiro Yamaguchi

Shoichiro Yamaguchi 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: 20190323685
    Abstract: An optical component includes a first substrate including a phosphor substrate and a second substrate including a translucent substrate and supporting the first substrate. The translucent substrate has a polycrystalline structure with orientation.
    Type: Application
    Filed: July 1, 2019
    Publication date: October 24, 2019
    Applicant: NGK Insulators, Ltd.
    Inventors: Naotake OKADA, Jungo KONDO, Shoichiro YAMAGUCHI, lwao OHWADA
  • Publication number: 20190310408
    Abstract: A phosphor element comprises: a support substrate; an optical waveguide for propagating an excitation light through the waveguide, the optical waveguide comprising a phosphor generating a fluorescence, and the optical waveguide comprising an emission side end surface emitting the excitation light and the fluorescence, an opposing end surface opposing the emission side end surface, a bottom surface, a top surface opposing the bottom surface and a pair of side surfaces; a bottom surface side clad layer covering the bottom surface of the optical waveguide; a top surface side clad layer covering the top surface of the optical waveguide; side surface side clad layers covering the side surfaces of the optical waveguide, respectively; a top surface side reflection film covering the top surface side clad layer; side surface side reflection films covering the side surface side clad layers, respectively; and a bottom surface side reflection film provided between the support substrate and the bottom surface side clad la
    Type: Application
    Filed: June 13, 2019
    Publication date: October 10, 2019
    Applicant: NGK INSULATORS, LTD.
    Inventors: Jungo KONDO, Naotake OKADA, Shoichiro YAMAGUCHI, Keiichiro ASAI, Shuhei HIGASHIHARA, Yuichi Iwata, Tetsuya Ejiri, Akira Hamajima
  • Publication number: 20190309936
    Abstract: An optical component includes a first substrate including a phosphor substrate and a second substrate including a translucent substrate and supporting the first substrate. A bonding layer is provided between the first substrate and the second substrate, and the bonding layer includes at least one kind of element contained on a surface of the first substrate facing the second substrate and at least one kind of element contained on a surface of the second substrate facing the first substrate. The bonding layer contains 2% by weight or more and 45% by weight or less of at least one kind of metal element which is not included in any of the first substrate and the second substrate.
    Type: Application
    Filed: June 11, 2019
    Publication date: October 10, 2019
    Inventors: Jungo KONDO, Naotake OKADA, Keiichiro ASAI, Shuhei HIGASHIHARA, Shoichiro YAMAGUCHI
  • Publication number: 20190288473
    Abstract: An optical element includes an optical waveguide layer. The optical waveguide includes a periodic structure of grooves. The optical waveguide layer has a layer-thickness equal to or greater than 1.5 ?m and is made of material selected from a group consisting of Ta2O5, Al2O3, LiNbO3, LiTaO3, AlN, GaN, SiC, and Yttrium aluminum garnet (YAG). (D/0.5?)?2.5 is satisfied where D indicates the depth of groove; and ? indicates the pitch of the arranged grooves in the periodic structure. The unit of ? is identical to the unit of D.
    Type: Application
    Filed: May 31, 2019
    Publication date: September 19, 2019
    Applicant: NGK INSULATORS, LTD.
    Inventors: Kousuke NIWA, Jungo KONDOU, Shoichiro YAMAGUCHI, Keiichiro ASAI
  • Publication number: 20190284720
    Abstract: It is provided first electrode piece part-arrays each comprising a plurality of electrode piece parts on a first main face of a ferroelectric crystal substrate. A voltage is applied on the first electrode piece part-arrays to form first periodic polarization inversion structures. It is provided second electrode piece part-arrays each comprising a plurality of electrode piece parts between the adjacent plural first periodic polarization inversion structures. A voltage is applied on the second electrode piece part-arrays to form second polarization inversion structures.
    Type: Application
    Filed: March 27, 2019
    Publication date: September 19, 2019
    Inventors: Ryosuke HATTORI, Shoichiro YAMAGUCHI, Hidetsugu SHIMOKATA
  • Patent number: 10393931
    Abstract: A grating device includes an optical material layer; a channel type optical waveguide region provided in the optical material layer; extension regions provided on the outsides of the channel type optical waveguide region, respectively; a Bragg grating provided in the channel type optical waveguide region; and periodic microstructures provided in the extension regions, respectively. The periodic microstructures are provided in 50 percent or larger of a total of areas of the extension regions.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: August 27, 2019
    Assignee: NGK Insulators, Ltd.
    Inventors: Keiichiro Asai, Shoichiro Yamaguchi, Jungo Kondo, Toshihiro Tomita
  • Patent number: 10312023
    Abstract: A multilayer ceramic capacitor having inner electrodes with a Ni-Metal A alloy, the Metal A being selected from Fe, V, Y, and Cu and dissolved in the Ni to form a solid solution. The percentage of the Metal A with respect to the total amount of Metal A and Ni in near-surface regions located at a depth of 2 nm from a surface of the inner electrode in contact with an adjacent ceramic dielectric layer is 1.4 or more atom %, and XA?YA?1.0, where XA represents the atomic percentage of Metal A in the near-surface regions and YA represents the atomic percentage of Metal A in mid-thickness regions of the inner electrodes. A method for producing a multilayer ceramic capacitor includes annealing the ceramic multilayer body under specific conditions to thereby increase, in the inner electrodes, the percentage of Metal A in the near-surface regions.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: June 4, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Akitaka Doi, Shinichi Yamaguchi, Shoichiro Suzuki
  • Publication number: 20190154811
    Abstract: An optical scanning device includes a supporting body 2; an optical waveguide composed of a single crystal having electro-optic effect and integrated with the supporting body directly or through a clad layer; a plurality of periodic domain inversion parts formed in the optical waveguide, the periodic domain inversion parts having periods different from each other; and a plurality of electrodes capable of applying voltages on the periodic domain inversion parts, respectively, to generate diffraction gratings in the periodic domain inversion parts, respectively. The clad layer is composed of a material having a refractive index lower than a refractive index of the single crystal forming the optical waveguide.
    Type: Application
    Filed: January 2, 2019
    Publication date: May 23, 2019
    Applicant: NGK INSULATORS, LTD.
    Inventors: Jungo KONDO, Naotake OKADA, Tetsuya EJIRI, Keiichiro ASAI, Shoichiro YAMAGUCHI
  • Publication number: 20190120442
    Abstract: A phosphor device includes a phosphor layer composed of a phosphor glass or phosphor single crystal, a reflective film provided on the phosphor layer, a warping suppression layer provided on the reflective film, and a supporting body bonded to the warping suppression layer by direct bonding. Excitation light incident into the phosphor layer is converted to fluorescence, and the fluorescence and excitation light are reflected by the reflective film and emitted from the phosphor layer.
    Type: Application
    Filed: December 12, 2018
    Publication date: April 25, 2019
    Inventors: Naotake OKADA, Iwao OHWADA, Shoichiro YAMAGUCHI, Keiichiro ASAI, Jungo KONDO
  • Patent number: 10074962
    Abstract: A grating element includes: a support substrate; an optical material layer; a ridge optical waveguide having an incidence surface on which a laser light is incident and an emission end from which an emission light with a desired wavelength is emitted; and a Bragg grating including concave and convex portions formed within the optical waveguide. The optical waveguide includes an incident portion between the incidence surface and the Bragg grating, and a tapered portion between the incident portion and the Bragg grating. In the Bragg grating, a propagation light propagates in single mode. The width Win of the optical waveguide in the incident portion is larger than the width Wgr of the optical waveguide in the Bragg grating. The width Wt of the optical waveguide in the tapered portion is decreased from the incident portion toward the Bragg grating. The relationships represented by formulas (1) to (3) are satisfied.
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: September 11, 2018
    Assignee: NGK Insulators, Ltd.
    Inventors: Jungo Kondo, Shoichiro Yamaguchi, Keiichiro Asai, Tetsuya Ejiri, Naotake Okada
  • Patent number: 10063034
    Abstract: An external resonator type light emitting system includes a light source oscillating a semiconductor laser light by itself and a grating device providing an external resonator with the light source. The system performs oscillation in single mode. The light source includes an active layer oscillating the semiconductor laser light. The grating device includes an optical waveguide having an incident face to which the semiconductor laser is incident and an emitting face of emitting an emitting light of a desired wavelength, a Bragg grating formed in the optical waveguide, and a propagating portion provided between the incident face and the Bragg grating. Formulas (1) to (5) are satisfied.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: August 28, 2018
    Assignee: NGK INSULATORS, LTD.
    Inventors: Jungo Kondo, Shoichiro Yamaguchi, Takashi Yoshino, Yukihisa Takeuchi
  • Publication number: 20180239090
    Abstract: An optical waveguide substrate 1 includes an optical waveguide 9 composed of a multi layered film 4 of a plurality of optical material films 5, 6 and having end faces onto which a light is made incident or from which the light is emitted. The end face is an etched surface, and it is provided, on the end face, unevenness 7 corresponding to a difference of etching rates of the optical material films.
    Type: Application
    Filed: April 20, 2018
    Publication date: August 23, 2018
    Inventors: Keiichiro ASAI, Shoichiro YAMAGUCHI
  • Patent number: 10003175
    Abstract: An external resonator type light-emitting device includes a light source oscillating a semiconductor laser light and a grating element configuring an external resonator together with the light source. The light source includes an active layer oscillating the semiconductor laser light. The grating element includes an optical waveguide and a plurality of Bragg gratings formed in the optical waveguide. The optical waveguide includes an incident face on which the semiconductor laser light is incident and an emitting face from which an emitting light having a desired wavelength is emitted.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: June 19, 2018
    Assignee: NGK Insulators, Ltd.
    Inventors: Jungo Kondo, Shoichiro Yamaguchi, Tetsuya Ejiri
  • Patent number: 9979157
    Abstract: An external resonator type light-emitting device includes a light source oscillating a semiconductor laser light and a grating element configuring an external resonator together with the light source. The light source includes an active layer oscillating said semiconductor laser light. The grating element includes an optical waveguide and a plurality of Bragg gratings formed in the optical waveguide. The optical waveguide includes an incident face to which the semiconductor laser light is incident and an emitting face from which an emitting light having a desired wavelength is emitted. A half value reflectance R50 is larger than a reflectance R2 at an emitting end of the light source. A half value reflectance R50 is 3% or larger. A combined reflectance is not less than the half value reflectance R50 in a wavelength region ??50.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: May 22, 2018
    Assignee: NGK Insulators, Ltd.
    Inventors: Jungo Kondo, Shoichiro Yamaguchi, Tetsuya Ejiri
  • Patent number: 9933569
    Abstract: An evanescent light generation element for oscillating evanescent light from an optical waveguide to a clad layer, including a 0.1 ?m-10 ?m thin layer composed of a ferroelectric single crystal or oriented crystal having first and second principal surfaces, and incident side end and exit side end surfaces. A ridge optical waveguide is formed in the thin layer and extends between the incident and exit side end surfaces of the thin layer. At least a pair of grooves is formed on both sides of the ridge optical waveguide in the thin layer and opened at the first principal surface of the thin layer. A clad layer is provided on the first principal surface or the second principal surface. A width of the ridge optical waveguide at the exit side end surface is less than a width of the ridge optical waveguide at the incident side end surface.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: April 3, 2018
    Assignee: NGK Insulators, Ltd.
    Inventors: Jungo Kondo, Shoichiro Yamaguchi, Takashi Yoshino, Yukihisa Takeuchi
  • Patent number: 9915794
    Abstract: An optical device includes a semiconductor laser light source, a grating element and an optical transmission element. The grating element includes a ridge-type optical waveguide having an incident surface to which a semiconductor laser light is incident and an emitting surface from which an outgoing light having a desired wavelength is emitted, and a Bragg grating formed in the ridge-type optical waveguide. The light transmission element includes an optical transmission part having an incident surface to which the outgoing light from the ridge-type optical waveguide is incident. A near-field diameter in a horizontal direction at the incident surface of the optical transmission part is greater than a near-field diameter in the horizontal direction at the emitting surface of said ridge-type optical waveguide.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: March 13, 2018
    Assignee: NGK Insulators, Ltd.
    Inventors: Jungo Kondo, Shoichiro Yamaguchi, Yukihisa Takeuchi
  • Patent number: 9874694
    Abstract: A plurality of Bragg gratings are formed at predetermined locations of a laminate including a mounting substrate, a clad layer provided on the mounting substrate and an optical material layer provided on the clad layer. Optical waveguides are formed each including at least each of the Bragg gratings. Masks are formed each covering a region corresponding to each of the grating elements on the optical material layer. The optical material layer and clad layer are etched to shape an end face of each of the grating elements.
    Type: Grant
    Filed: October 12, 2016
    Date of Patent: January 23, 2018
    Assignee: NGK Insulators, Ltd.
    Inventors: Keiichiro Asai, Shoichiro Yamaguchi, Jungo Kondo, Naotake Okada, Tetsuya Ejiri
  • Patent number: 9859684
    Abstract: A grating device includes a support substrate, an optical material layer 11 disposed on the support substrate and having a thickness of 0.5 ?m or more and 3.0 ?m or less, a ridge optical waveguide formed by a pair of ridge grooves in the optical material layer and having a light-receiving surface for receiving a semiconductor laser light and a light-emitting surface for emitting light having a desired wavelength, a Bragg grating 12 comprising convexes and concaves formed in the ridge optical waveguide, and a propagating portion 13 disposed between the light-receiving surface and the Bragg grating. The relationships represented by the following Formulas (1) to (4) are satisfied: 0.8 nm???G?6.0 nm??(1); 10 ?m?Lb?300 ?m??(2); 20 nm?td?250 nm??(3); and nb?1.8??(4).
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: January 2, 2018
    Assignee: NGK INSULATORS, LTD.
    Inventors: Jungo Kondo, Shoichiro Yamaguchi, Tetsuya Ejiri, Keiichiro Asai, Naotake Okada
  • Publication number: 20170363785
    Abstract: A grating device includes a supporting body having a first main face and a second main face, an under clad layer provided on the first main face of the supporting body, an optical material layer provided on the under clad layer, and a back face layer provided on the second main face of the supporting body. The under clad layer is composed of g a material having a refractive index of 1.69 or lower. The optical material layer is composed of a metal oxide having a refractive index of 1.70 or higher and 3.50 or lower and includes a Bragg grating. The back face layer is composed of a material having a refractive index of 1.69 or lower or a metal oxide having a refractive index of 1.70 or higher and 3.50 or lower.
    Type: Application
    Filed: September 6, 2017
    Publication date: December 21, 2017
    Applicant: NGK INSULATORS, LTD.
    Inventors: Kousuke Niwa, Keiichiro Asai, Shoichiro Yamaguchi, Jungo Kondo
  • Publication number: 20170343708
    Abstract: It is provided an assembly including an optical material layer composed of a metal oxide, an underlying layer provided over the optical material layer and composed of a metal or a metal silicide, and a resin layer provided over the underlying layer. A mold including a design pattern corresponding with the fine pattern to the resin layer of the assembly to transcript the design pattern to the resin layer. The resin layer and underlying layer are etched to form an opening in the resin layer and underlying layer to expose the optical material layer through the opening. The optical material layer is etched using the underlying layer as a mask to form the fine pattern in the optical material layer.
    Type: Application
    Filed: August 15, 2017
    Publication date: November 30, 2017
    Applicant: NGK INSULATORS, LTD.
    Inventors: Kousuke NIWA, Keiichiro ASAI, Shoichiro YAMAGUCHI, Jungo KONDO