Patents by Inventor Asami Uchiyama

Asami Uchiyama 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).

  • SEMICONDUCTOR LASER DEVICE AND METHOD FOR MANUFACTURING THE SAME
    Publication number: 20230253759
    Abstract: A modulator-integrated semiconductor laser (100) includes a semiconductor laser (101), an electro-absorption modulator (102), and an optical attenuator (103) that are monolithically integrated. The electro-absorption modulator (102) and the optical attenuator (103) are connected in series in a stage succeeding the semiconductor laser (101). A control unit (44) controls the DC bias voltage to be applied to the optical attenuator (103) to increase as temperature of the modulator-integrated semiconductor laser (100) rises.
    Type: Application
    Filed: October 13, 2020
    Publication date: August 10, 2023
    Applicant: Mitsubishi Electric Corporation
    Inventors: Asami UCHIYAMA, Takeshi YAMATOYA
  • Semiconductor optical element, optical module and method of manufacturing semiconductor optical element
    Patent number: 9246622
    Abstract: A semiconductor optical element and an optical module in which extinction ratio variation among integrated optical modulation elements is reduced. An optical module has a wavelength multiplexer that multiplexes light respectively emerging from electric-field-absorption modulator (EAM) portions of integrated optical modulation elements, and that outputs the multiplexed light. The integrated optical modulation element has a signal input terminal, a laser element portion, and an EAM portion. Each of the integrated optical modulation elements has a difference between an oscillation wavelength and a barrier layer bandgap wavelength, represented as an LDBG wavelength difference. Variation of the LDBG wavelength differences is limited within a range of ±1 nm.
    Type: Grant
    Filed: May 1, 2014
    Date of Patent: January 26, 2016
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Asami Uchiyama, Koichi Akiyama, Yusuke Azuma, Yoshimichi Morita, Takeshi Yamatoya
  • SEMICONDUCTOR OPTICAL ELEMENT, OPTICAL MODULE AND METHOD OF MANUFACTURING SEMICONDUCTOR OPTICAL ELEMENT
    Publication number: 20150093115
    Abstract: A semiconductor optical element and an optical module in which extinction ratio variation among integrated optical modulation elements is reduced. An optical module has a wavelength multiplexer that multiplexes light respectively emerging from electric-field-absorption modulator (EAM) portions of integrated optical modulation elements, and that outputs the multiplexed light. The integrated optical modulation element has a signal input terminal, a laser element portion, and an EAM portion. Each of the integrated optical modulation elements has a difference between an oscillation wavelength and a barrier layer bandgap wavelength, represented as an LDBG wavelength difference. Variation of the LDBG wavelength differences is limited within a range of ±1 nm.
    Type: Application
    Filed: May 1, 2014
    Publication date: April 2, 2015
    Applicant: Mitsubishi Electric Corporation
    Inventors: Asami Uchiyama, Koichi Akiyama, Yusuke Azuma, Yoshimichi Morita, Takeshi Yamatoya