Patents by Inventor Yoshihiro Tateiwa
Yoshihiro Tateiwa 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).
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Patent number: 9544063Abstract: An optical receiver is disclosed. The optical receiver includes a polarization holding fiber configured to receive a light emitted from a light source and a polarizer configured to be irradiated with the light output from the polarization holding fiber. A method for adjusting the optical receiver comprises: inputting a plurality of lights having different wavelengths to a polarization holding fiber; detecting intensities of a plurality of lights output from the polarization holding fiber; calculating an adjustment value for an angle of the polarization holding fiber based on a ratio between the detected intensities of the plurality of lights; and adjusting the angle of the polarization holding fiber based on the calculated adjustment value.Type: GrantFiled: January 27, 2015Date of Patent: January 10, 2017Assignee: Sumitomo Electric Industries, Ltd.Inventor: Yoshihiro Tateiwa
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Patent number: 9163982Abstract: An optical receiver device including: a light-receiving element having a first electrode acting as an outputting electrode and a second electrode coupled to a potential that is different from a ground potential; an amplifier device having an amplifier element, a connection terminal including a signal electrode and a ground electrode on an upper face thereof; a first conductor coupling a potential of the first electrode of the light-receiving element to the signal electrode, the first conductor being introduced from the upper face side of the amplifier device; and a second conductor coupling a potential of the second electrode of the light-receiving element to the ground electrode, the second conductor introduced from the upper face side of the amplifier device.Type: GrantFiled: April 25, 2011Date of Patent: October 20, 2015Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Masaru Takechi, Sousaku Sawada, Yoshihiro Tateiwa
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Publication number: 20150215049Abstract: An optical receiver is disclosed. The optical receiver includes a polarization holding fiber configured to receive a light emitted from a light source and a polarizer configured to be irradiated with the light output from the polarization holding fiber. A method for adjusting the optical receiver comprises: inputting a plurality of lights having different wavelengths to a polarization holding fiber; detecting intensities of a plurality of lights output from the polarization holding fiber; calculating an adjustment value for an angle of the polarization holding fiber based on a ratio between the detected intensities of the plurality of lights; and adjusting the angle of the polarization holding fiber based on the calculated adjustment value.Type: ApplicationFiled: January 27, 2015Publication date: July 30, 2015Inventor: Yoshihiro TATEIWA
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Publication number: 20140332670Abstract: The present invention is a photodetecting circuit comprising a plurality of operational amplifiers provided so as to correspond to respective photo detectors disposed on a common semiconductor substrate, each operational amplifier having an inverting input terminal connected to a cathode of the photo detector and a non-inverting input terminal supplied with a voltage to be applied to the photo detector; a plurality of resistances connected between output terminals and inverting input terminals of the respective operational amplifiers; and a terminal, disposed on at least the inverting input terminal side in both ends of the resistance, for connecting with a meter for measuring a photocurrent of the photo detector.Type: ApplicationFiled: May 8, 2014Publication date: November 13, 2014Applicant: Sumitomo Electric Industries, Ltd.Inventor: Yoshihiro Tateiwa
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Patent number: 8867911Abstract: A device able to evaluate a phase difference between I-component and Q-component of signal light generated by an optical hybrid is disclosed. The device includes a detector, a compensator and an evaluator. The detector detects positive and negative elements of each of the I-component and the Q-component. The compensator generates a compensated I-component and a compensated Q-component so as to keep the sum of positive and negative elements of each of components in constant. The evaluator determines the phase difference via an ellipsoid drawn by the compensated I- and Q-components.Type: GrantFiled: August 29, 2012Date of Patent: October 21, 2014Assignee: Sumitomo Electric Industries, Ltd.Inventor: Yoshihiro Tateiwa
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Patent number: 8737440Abstract: An optical assembly (OSA) that installs a semiconductor optical device mounted on a thermo-electric controller (TEC) is disclosed. The TEC in the upper plate thereof is mechanically connected to the housing, or to the block stiffly fixed to the housing by a bridge made of stiff material. The bridge preferably extends along the optical axis to show enhanced durability against the impact caused by an external ferrule abutting against the receptacle of the OSA.Type: GrantFiled: December 14, 2010Date of Patent: May 27, 2014Assignee: Sumitomo Electric Industries, Ltd.Inventors: Toru Watanabe, Yasuyuki Yamauchi, Yoshihiro Tateiwa
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Publication number: 20140072005Abstract: An optical assembly (OSA) that installs a semiconductor optical device mounted on a thermo-electric controller (TEC) is disclosed. The TEC in the upper plate thereof is mechanically connected to the housing, or to the block stiffly fixed to the housing by a bridge made of stiff material. The bridge preferably extends along the optical axis to show enhanced durability against the impact caused by an external ferrule abutting against the receptacle of the OSA.Type: ApplicationFiled: November 19, 2013Publication date: March 13, 2014Applicant: Sumitomo Electric Industries, Ltd.Inventors: Toru Watanabe, Yasuyuki Yamauchi, Yoshihiro Tateiwa
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Publication number: 20130064540Abstract: A device able to evaluate a phase difference between I-component and Q-component of signal light generated by an optical hybrid is disclosed. The device includes a detector, a compensator and an evaluator. The detector detects positive and negative elements of each of the I-component and the Q-component. The compensator generates a compensated I-component and a compensated Q-component so as to keep the sum of positive and negative elements of each of components in constant. The evaluator determines the phase difference via an ellipsoid drawn by the compensated I- and Q-components.Type: ApplicationFiled: August 29, 2012Publication date: March 14, 2013Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventor: Yoshihiro TATEIWA
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Publication number: 20130001273Abstract: A mounting method includes: holding a component at a position off a gravity center of the component; pressing the component to a solder provided on a mount face of a substrate; and adding pressing force to an opposite position of the component across the gravity center from the position held in the pressing of the component toward the mount face, after the pressing of the component.Type: ApplicationFiled: June 27, 2012Publication date: January 3, 2013Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventor: Yoshihiro Tateiwa
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Publication number: 20110215225Abstract: An optical receiver device including: a light-receiving element having a first electrode acting as an outputting electrode and a second electrode coupled to a potential that is different from a ground potential; an amplifier device having an amplifier element, a connection terminal including a signal electrode and a ground electrode on an upper face thereof; a first conductor coupling a potential of the first electrode of the light-receiving element to the signal electrode, the first conductor being introduced from the upper face side of the amplifier device; and a second conductor coupling a potential of the second electrode of the light-receiving element to the ground electrode, the second conductor introduced from the upper face side of the amplifier device.Type: ApplicationFiled: April 25, 2011Publication date: September 8, 2011Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Masaru Takechi, Sousaku Sawada, Yoshihiro Tateiwa
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Publication number: 20110142086Abstract: An optical assembly (OSA) that installs a semiconductor optical device mounted on a thermo-electric controller (TEC) is disclosed. The TEC in the upper plate thereof is mechanically connected to the housing, or to the block stiffly fixed to the housing by a bridge made of stiff material. The bridge preferably extends along the optical axis to show enhanced durability against the impact caused by an external ferrule abutting against the receptacle of the OSA.Type: ApplicationFiled: December 14, 2010Publication date: June 16, 2011Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Toru WATANABE, Yasuyuki YAMAUCHI, Yoshihiro TATEIWA
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Patent number: 7663228Abstract: An electronic component includes an electronic element, a conductive first base portion, a conductive second base portion, an insulator and a terminal. An electronic element is to be mounted on the electronic element mounting portion. The electronic element mounting portion is mounted on the first base portion. The insulator insulates the first base portion from the second base portion and couples the first base portion to the second base portion. The terminal is provided on the first base portion and is insulated from the first base portion.Type: GrantFiled: March 27, 2007Date of Patent: February 16, 2010Assignee: Eudyna Devices Inc.Inventors: Yoshihiro Tateiwa, Kakushi Nakagawa
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Publication number: 20070228405Abstract: An electronic component includes an electronic element, a conductive first base portion, a conductive second base portion, an insulator and a terminal. An electronic element is to be mounted on the electronic element mounting portion. The electronic element mounting portion is mounted on the first base portion. The insulator insulates the first base portion from the second base portion and couples the first base portion to the second base portion. The terminal is provided on the first base portion and is insulated from the first base portion.Type: ApplicationFiled: March 27, 2007Publication date: October 4, 2007Applicant: EUDYNA DEVICES INC.Inventors: Yoshihiro Tateiwa, Kakushi Nakagawa