Patents by Inventor Masayuki MOTOYA

Masayuki MOTOYA 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: 20220197104
    Abstract: Provided is an optical modulator that can be driven at lower voltage through the use of differential signal output. An optical modulator includes a substrate 1 and optical waveguides (21, 22) and a control electrode that are formed on the substrate, in which the optical waveguide includes Mach-Zehnder type optical waveguide, the control electrode is provided with two ground electrodes sandwiching three signal electrodes; the three signal electrodes are constituted by second and third signal electrodes that sandwich a first signal electrode, and have a wiring structure in which one modulation signal of the differential signal is applied to the first signal electrode, and the other modulation signal of the differential signal is applied to the second and third signal electrodes; and one branched waveguide (21) out of two Mach-Zehnder type optical waveguides is disposed between the first and second signal electrodes, and the other branched waveguide (22) is disposed between the first and third signal electrodes.
    Type: Application
    Filed: September 26, 2019
    Publication date: June 23, 2022
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Norikazu MIYAZAKI, Kosuke OKAHASHI, Masayuki MOTOYA
  • Publication number: 20220179247
    Abstract: In order to provide an optical modulator capable of preventing damage to the substrate and preventing deterioration of the properties of the modulator by reducing the stress on the substrate generated by the modulation electrode, there is provided an optical modulator 1, including: a substrate 5 having an electro-optic effect; an optical waveguide 10 formed on the substrate 5; and a modulation electrode (signal electrode S and ground electrode G) provided on the substrate 5 and modulating a light wave propagating in the optical waveguide 10, wherein a resin 8 to reduce the stress on the substrate 5 generated by the modulation electrode is arranged between a part of the bottom surface of the modulation electrode and the substrate 5 facing a part of the bottom surface of the modulation electrode.
    Type: Application
    Filed: August 14, 2019
    Publication date: June 9, 2022
    Inventors: Kosuke OKAHASHI, Norikazu MIYAZAKI, Masayuki MOTOYA
  • Publication number: 20220146901
    Abstract: To provide an optical modulator in which a plurality of Mach-Zehnder type optical waveguides are integrated, which can be driven at a low voltage, and in which the occurrence of a crosstalk phenomenon is suppressed. Provided is an optical modulator including a substrate 1 having an electro-optic effect, and an optical waveguide 10 and a control electrode that are formed on the substrate, in which the optical waveguide has a structure in which a plurality of Mach-Zehnder type optical waveguides are disposed in parallel, the control electrode has a GSSG type differential electrode structure in which two signal electrodes S are disposed between two ground electrodes G for one of the Mach-Zehnder type optical waveguides, and a crosstalk suppressing unit that suppresses signal crosstalk is provided in the ground electrode sandwiched between adjacent Mach-Zehnder type optical waveguides, so that optical modulator can be driven at a low voltage, and in which the occurrence of a crosstalk phenomenon is suppressed.
    Type: Application
    Filed: August 15, 2019
    Publication date: May 12, 2022
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Norikazu MIYAZAKI, Kosuke OKAHASHI, Masayuki MOTOYA
  • Publication number: 20220057661
    Abstract: In an optical modulation element using a thinly processed substrate, cracking of the substrate during electrical connection is prevented, and poor connection or a reduction in manufacturing yield is prevented. An optical waveguide element includes an optical substrate on which an optical waveguide and a conductor pattern are formed, and a support substrate that supports the optical substrate, in which the conductor pattern includes at least one electrical connection area defined as a range in which electrical connection is performed, the optical substrate has a substrate removal portion in which a material of the optical substrate has been removed to penetrate through the optical substrate at a portion corresponding to the electrical connection area, and at least a part of the electrical connection area is formed on the support substrate via the substrate removal portion.
    Type: Application
    Filed: September 26, 2019
    Publication date: February 24, 2022
    Inventors: Masayuki Motoya, Norikazu Miyazaki
  • Publication number: 20210165299
    Abstract: An optical waveguide element including a substrate, an optical waveguide formed on the substrate, and an electrode for controlling a light wave propagating through the optical waveguide, in which the optical waveguide and the electrode have an intersection in which the optical waveguide and the electrode intersect with each other, and at the intersection, the electrode has a multilayer structure including a plurality of metal layers made of a metal material, and a resin layer made of a resin material is formed between the electrode and the substrate.
    Type: Application
    Filed: November 27, 2020
    Publication date: June 3, 2021
    Inventors: Masayuki Motoya, Toru Sugamata
  • Patent number: 10895765
    Abstract: In a waveguide-type optical modulation element that modulates light by applying radio frequency signals to an electrode, the realization of the additional broadening of the bandwidth by improving the degree of freedom in the design of the electrode is enabled. An optical modulation element, which includes optical waveguides provided in a substrate and electrodes that control light waves propagating through the optical waveguides and modulates light by propagating radio frequency signals to the electrodes, in which the electrodes include conductive layers made of copper or a copper alloy and protective layers made of a material other than copper and a copper alloy.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: January 19, 2021
    Assignees: SUMITOMO OSAKA CEMENT CO., LTD., TOHOKU UNIVERSITY
    Inventors: Tetsuya Fujino, Masayuki Motoya, Tetsuya Goto
  • Publication number: 20200409188
    Abstract: In a light modulation element that modulates light by controlling light waves that propagate through an optical waveguide, the realization of the additional broadening of the bandwidth by improving the degree of freedom in the design of the electrode is enabled. A light modulation element which includes optical waveguides formed on a substrate and a control electrode and modulates light by controlling light waves that propagate through the optical waveguide by conducting electricity in the control electrode, in which the control electrode includes radio frequency electrodes that configure a signal line through which radio frequency signals propagate and a bias electrode to which a bias voltage is applied, and the radio frequency electrode has a conductive layer made of copper or a copper alloy.
    Type: Application
    Filed: March 5, 2018
    Publication date: December 31, 2020
    Inventors: Toshio Kataoka, Tetsuya Fujino, Masayuki Motoya
  • Patent number: 10578893
    Abstract: An optical waveguide element that has improved frequency response in a high frequency region is provided. An optical waveguide element includes: a substrate that has an electro-optic effect; an optical waveguide that is formed on the substrate; a control electrode that is for modulating light waves propagating through the optical waveguide; and a reinforcing substrate that holds the substrate via an adhesion layer, and the reinforcing substrate has a low-dielectric constant portion with a lower dielectric constant than that of the reinforcing substrate at least in a part of a region in a plan view of the reinforcing substrate such that the low-dielectric constant portion partitions the reinforcing substrate in a thickness direction.
    Type: Grant
    Filed: March 21, 2019
    Date of Patent: March 3, 2020
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Yoichi Hosokawa, Masayuki Motoya
  • Publication number: 20200026146
    Abstract: In a waveguide-type optical modulation element that modulates light by applying radio frequency signals to an electrode, the realization of the additional broadening of the bandwidth by improving the degree of freedom in the design of the electrode is enabled. An optical modulation element, which includes optical waveguides provided in a substrate and electrodes that control light waves propagating through the optical waveguides and modulates light by propagating radio frequency signals to the electrodes, in which the electrodes include conductive layers made of copper or a copper alloy and protective layers made of a material other than copper and a copper alloy.
    Type: Application
    Filed: March 27, 2018
    Publication date: January 23, 2020
    Inventors: Tetsuya Fujino, Masayuki Motoya, Tetsuya Goto
  • Patent number: 10514561
    Abstract: An optical modulator includes a substrate, an optical waveguide, a control electrode applying a high frequency signal in order to modulate light waves propagating through the optical waveguide, and a relay substrate provided with a relay line to transfer the high frequency signal to the control electrode. The control electrode and the relay line together have a coplanar line structure inclusive of at least electrical connection portions of both the control electrode and the relay line. The control electrode includes an electrical connection portion and a routing portion positioned between the electrical connection portion and an active portion applying an electrical field to the optical waveguide. The routing portion has a coplanar line structure. A distance between ground electrodes sandwiching a signal electrode in the electrical connection portion of the control electrode is substantially equal to a distance between ground electrodes sandwiching a signal electrode of the routing portion.
    Type: Grant
    Filed: March 21, 2019
    Date of Patent: December 24, 2019
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Masayuki Motoya, Toshio Kataoka
  • Publication number: 20190302493
    Abstract: An optical waveguide element that has improved frequency response in a high frequency region is provided. An optical waveguide element includes: a substrate that has an electro-optic effect; an optical waveguide that is formed on the substrate; a control electrode that is for modulating light waves propagating through the optical waveguide; and a reinforcing substrate that holds the substrate via an adhesion layer, and the reinforcing substrate has a low-dielectric constant portion with a lower dielectric constant than that of the reinforcing substrate at least in a part of a region in a plan view of the reinforcing substrate such that the low-dielectric constant portion partitions the reinforcing substrate in a thickness direction.
    Type: Application
    Filed: March 21, 2019
    Publication date: October 3, 2019
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Yoichi HOSOKAWA, Masayuki MOTOYA
  • Publication number: 20190302489
    Abstract: An optical modulator includes a substrate, an optical waveguide, a control electrode applying a high frequency signal in order to modulate light waves propagating through the optical waveguide, and a relay substrate provided with a relay line to transfer the high frequency signal to the control electrode. The control electrode and the relay line together have a coplanar line structure inclusive of at least electrical connection portions of both the control electrode and the relay line. The control electrode includes an electrical connection portion and a routing portion positioned between the electrical connection portion and an active portion applying an electrical field to the optical waveguide. The routing portion has a coplanar line structure. A distance between ground electrodes sandwiching a signal electrode in the electrical connection portion of the control electrode is substantially equal to a distance between ground electrodes sandwiching a signal electrode of the routing portion.
    Type: Application
    Filed: March 21, 2019
    Publication date: October 3, 2019
    Applicant: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Masayuki MOTOYA, Toshio KATAOKA
  • Patent number: 9977270
    Abstract: An optical device is provided, which includes: an optical waveguide provided in a substrate having an electro-optic effect; a signal electrode provided on the substrate and above the optical waveguide; and a peeling prevention film which is provided on at least a part of an outer peripheral portion of the substrate and at a position spaced apart from the signal electrode, and also serves as a ground electrode.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: May 22, 2018
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Yoshizumi Ishikawa, Youichi Hosokawa, Masayuki Motoya, Satoshi Oikawa
  • Publication number: 20170227798
    Abstract: An optical device is provided, which includes: an optical waveguide provided in a substrate having an electro-optic effect; a signal electrode provided on the substrate and above the optical waveguide; and a peeling prevention film which is provided on at least a part of an outer peripheral portion of the substrate and at a position spaced apart from the signal electrode, and also serves as a ground electrode.
    Type: Application
    Filed: September 30, 2015
    Publication date: August 10, 2017
    Inventors: Yoshizumi ISHIKAWA, Youichi HOSOKAWA, Masayuki MOTOYA, Satoshi OIKAWA
  • Patent number: 9519200
    Abstract: Provided is an optical control device including first and second optical waveguides, a first control signal electrode including a first input-side signal electrode, a second control signal electrode including a second input-side signal electrode, an inter-signal-electrode ground electrode, a first ground electrode, and a second ground electrode. The substrate has a first groove that is provided between the first input-side signal electrode and the inter-signal-electrode ground, a second groove that is provided between the first input-side signal electrode and the first ground electrode, a third groove that is provided between the second input-side signal electrode and the inter-signal-electrode ground electrode, and a fourth groove that is provided between the second input-side signal electrode and the second ground electrode.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: December 13, 2016
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Toshio Kataoka, Masayuki Motoya, Junichiro Ichikawa
  • Publication number: 20160054637
    Abstract: Provided is an optical control device including first and second optical waveguides, a first control signal electrode including a first input-side signal electrode, a second control signal electrode including a second input-side signal electrode, an inter-signal-electrode ground electrode, a first ground electrode, and a second ground electrode. The substrate has a first groove that is provided between the first input-side signal electrode and the inter-signal-electrode ground, a second groove that is provided between the first input-side signal electrode and the first ground electrode, a third groove that is provided between the second input-side signal electrode and the inter-signal-electrode ground electrode, and a fourth groove that is provided between the second input-side signal electrode and the second ground electrode.
    Type: Application
    Filed: March 26, 2014
    Publication date: February 25, 2016
    Inventors: Toshio Kataoka, Masayuki Motoya, Junichiro Ichikawa
  • Patent number: 9057893
    Abstract: Provided is a light control element wherein stable operation at low driving voltage is possible.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: June 16, 2015
    Assignee: Sumitomo Osaka Cement Co., Ltd.
    Inventors: Masayuki Motoya, Junichiro Ichikawa, Hiroshi Murata
  • Patent number: 8737773
    Abstract: An optical control element having a substrate 1 having an electro-optic effect, an optical waveguide 2 formed on the substrate, and a control electrode 3 that is provided on the substrate and controls the phase of light that propagates through the optical waveguide, in which the control electrode 3 has a plurality of resonant-type electrodes 31 and 32 that are disposed along the optical waveguide 2 and have different resonance frequencies (f1 and f2), an feeder electrode 30 through which control signals are input and branched signal electrodes that are branched from the feeder electrode are connected to the respective resonant-type electrodes, and the branched signal electrode is configured to match a timing at which the electric control signal is applied to each of the resonant-type electrodes and a timing at which the light that propagates through the optical waveguide passes at the section of each of the resonant-type electrodes.
    Type: Grant
    Filed: March 8, 2012
    Date of Patent: May 27, 2014
    Assignee: Sumitomo Osaka Cement Co., Ltd.
    Inventors: Masayuki Motoya, Junichiro Ichikawa, Hiroshi Murata
  • Publication number: 20130071059
    Abstract: Provided is a light control element wherein stable operation at low driving voltage is possible.
    Type: Application
    Filed: May 31, 2011
    Publication date: March 21, 2013
    Applicant: Sumitomo Osaka Cement Co., Ltd.
    Inventors: Masayuki Motoya, Junichiro Ichikawa, Hiroshi Murata
  • Publication number: 20120230627
    Abstract: An optical control element having a substrate 1 having an electro-optic effect, an optical waveguide 2 formed on the substrate, and a control electrode 3 that is provided on the substrate and controls the phase of light that propagates through the optical waveguide, in which the control electrode 3 has a plurality of resonant-type electrodes 31 and 32 that are disposed along the optical waveguide 2 and have different resonance frequencies (f1 and f2), an feeder electrode 30 through which control signals are input and branched signal electrodes that are branched from the feeder electrode are connected to the respective resonant-type electrodes, and the branched signal electrode is configured to match a timing at which the electric control signal is applied to each of the resonant-type electrodes and a timing at which the light that propagates through the optical waveguide passes at the section of each of the resonant-type electrodes.
    Type: Application
    Filed: March 8, 2012
    Publication date: September 13, 2012
    Applicant: Sumitomo Osaka Cement Co., Ltd.
    Inventors: Masayuki MOTOYA, Junichiro Ichikawa, Hiroshi Murata