Patents by Inventor Kouichi Suzuki
Kouichi Suzuki 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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Publication number: 20240134582Abstract: An image processing device includes an image processing unit, a UI unit, a VPN processing unit, and a housing. The image processing unit includes a printer and/or a scanner. The UI unit is the target of an input action performed by the user. The VPN processing unit connects to a VPN using authentication information obtained through the UI unit. The image processing unit, the UT unit, and the VPN processing unit are provided to the housing.Type: ApplicationFiled: August 19, 2021Publication date: April 25, 2024Inventors: Hiroshi OKA, Shigeki TAKAYA, Hirofumi SUZUKI, Kouichi MARUTA
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Publication number: 20230216594Abstract: In a coherent optical receiver device, the dynamic range considerably decreases in the case of selectively receiving the optical multiplexed signals by means of the wavelength of the local oscillator light, therefore, a coherent optical receiver device according to an exemplary aspect of the invention includes a coherent optical receiver receiving optical multiplexed signals in a lump in which signal light is multiplexed; a variable optical attenuator; a local oscillator connected to the coherent optical receiver; and a first controller controlling the variable optical attenuator by means of a first control signal based on an output signal of the coherent optical receiver; wherein the coherent optical receiver includes a 90-degree hybrid circuit, a photoelectric converter, and an impedance conversion amplifier, and selectively detects the signal light interfering with local oscillation light output by the local oscillator out of the optical multiplexed signals; and the variable optical attenuator is disposedType: ApplicationFiled: March 14, 2023Publication date: July 6, 2023Applicant: NEC CorporationInventor: Kouichi SUZUKI
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Patent number: 11632180Abstract: In a coherent optical receiver device, the dynamic range considerably decreases in the case of selectively receiving the optical multiplexed signals by means of the wavelength of the local oscillator light, therefore, a coherent optical receiver device according to an exemplary aspect of the invention includes a coherent optical receiver receiving optical multiplexed signals in a lump in which signal light is multiplexed; a variable optical attenuator; a local oscillator connected to the coherent optical receiver; and a first controller controlling the variable optical attenuator by means of a first control signal based on an output signal of the coherent optical receiver; wherein the coherent optical receiver includes a 90-degree hybrid circuit, a photoelectric converter, and an impedance conversion amplifier, and selectively detects the signal light interfering with local oscillation light output by the local oscillator out of the optical multiplexed signals; and the variable optical attenuator is disposedType: GrantFiled: March 31, 2021Date of Patent: April 18, 2023Assignee: NEC CORPORATIONInventor: Kouichi Suzuki
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Patent number: 11316412Abstract: A motor includes an annular sensor magnet rotated integrally with a rotation shaft of a rotor by a bushing, and a rotation detector arranged opposed to the sensor magnet to detect rotation information of the rotor. The bushing includes an annular fixing portion, which is fixed to the rotation shaft, and an extension, which extends from the fixing portion in an axial direction of the rotation shaft and is embedded in the sensor magnet. The extension includes an axial engagement portion engaged with the sensor magnet in the axial direction inside the sensor magnet.Type: GrantFiled: February 19, 2018Date of Patent: April 26, 2022Assignee: DENSO CORPORATIONInventors: Toshiyuki Kitai, Kouichi Suzuki
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Publication number: 20210218475Abstract: In a coherent optical receiver device, the dynamic range considerably decreases in the case of selectively receiving the optical multiplexed signals by means of the wavelength of the local oscillator light, therefore, a coherent optical receiver device according to an exemplary aspect of the invention includes a coherent optical receiver receiving optical multiplexed signals in a lump in which signal light is multiplexed; a variable optical attenuator; a local oscillator connected to the coherent optical receiver; and a first controller controlling the variable optical attenuator by means of a first control signal based on an output signal of the coherent optical receiver; wherein the coherent optical receiver includes a 90-degree hybrid circuit, a photoelectric converter, and an impedance conversion amplifier, and selectively detects the signal light interfering with local oscillation light output by the local oscillator out of the optical multiplexed signals; and the variable optical attenuator is disposedType: ApplicationFiled: March 31, 2021Publication date: July 15, 2021Applicant: NEC CORPORATIONInventor: Kouichi SUZUKI
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Patent number: 10985844Abstract: In a coherent optical receiver device, the dynamic range considerably decreases in the case of selectively receiving the optical multiplexed signals by means of the wavelength of the local oscillator light, therefore, a coherent optical receiver device according to an exemplary aspect of the invention includes a coherent optical receiver receiving optical multiplexed signals in a lump in which signal light is multiplexed; a variable optical attenuator; a local oscillator connected to the coherent optical receiver; and a first controller controlling the variable optical attenuator by means of a first control signal based on an output signal of the coherent optical receiver; wherein the coherent optical receiver includes a 90-degree hybrid circuit, a photoelectric converter, and an impedance conversion amplifier, and selectively detects the signal light interfering with local oscillation light output by the local oscillator out of the optical multiplexed signals; and the variable optical attenuator is disposedType: GrantFiled: June 15, 2020Date of Patent: April 20, 2021Assignee: NEC CORPORATIONInventor: Kouichi Suzuki
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Publication number: 20200313776Abstract: In a coherent optical receiver device, the dynamic range considerably decreases in the case of selectively receiving the optical multiplexed signals by means of the wavelength of the local oscillator light, therefore, a coherent optical receiver device according to an exemplary aspect of the invention includes a coherent optical receiver receiving optical multiplexed signals in a lump in which signal light is multiplexed; a variable optical attenuator; a local oscillator connected to the coherent optical receiver; and a first controller controlling the variable optical attenuator by means of a first control signal based on an output signal of the coherent optical receiver; wherein the coherent optical receiver includes a 90-degree hybrid circuit, a photoelectric converter, and an impedance conversion amplifier, and selectively detects the signal light interfering with local oscillation light output by the local oscillator out of the optical multiplexed signals; and the variable optical attenuator is disposedType: ApplicationFiled: June 15, 2020Publication date: October 1, 2020Applicant: NEC CORPORATIONInventor: Kouichi Suzuki
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Patent number: 10720998Abstract: In a coherent optical receiver device, the dynamic range considerably decreases in the case of selectively receiving the optical multiplexed signals by means of the wavelength of the local oscillator light, therefore, a coherent optical receiver device according to an exemplary aspect of the invention includes a coherent optical receiver receiving optical multiplexed signals in a lump in which signal light is multiplexed; a variable optical attenuator; a local oscillator connected to the coherent optical receiver; and a first controller controlling the variable optical attenuator by means of a first control signal based on an output signal of the coherent optical receiver; wherein the coherent optical receiver includes a 90-degree hybrid circuit, a photoelectric converter, and an impedance conversion amplifier, and selectively detects the signal light interfering with local oscillation light output by the local oscillator out of the optical multiplexed signals; and the variable optical attenuator is disposedType: GrantFiled: September 19, 2019Date of Patent: July 21, 2020Assignee: NEC CORPORATIONInventor: Kouichi Suzuki
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Patent number: 10608738Abstract: A coherent optical module includes an optical power monitor configured to monitor power of a wavelength multiplexed signal, a local oscillator configured to output a local oscillation light with an optical power corresponding to the monitored power of the wavelength multiplexed signal, a coherent receiver configured to receive an optical signal from the wavelength multiplexed signal by an interference with the local oscillation light, and a converter configured to convert the received optical signal to an electrical signal.Type: GrantFiled: July 22, 2019Date of Patent: March 31, 2020Assignee: NEC CORPORATIONInventors: Masao Morie, Kouichi Suzuki
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Publication number: 20200014466Abstract: In a coherent optical receiver device, the dynamic range considerably decreases in the case of selectively receiving the optical multiplexed signals by means of the wavelength of the local oscillator light, therefore, a coherent optical receiver device according to an exemplary aspect of the invention includes a coherent optical receiver receiving optical multiplexed signals in a lump in which signal light is multiplexed; a variable optical attenuator; a local oscillator connected to the coherent optical receiver; and a first controller controlling the variable optical attenuator by means of a first control signal based on an output signal of the coherent optical receiver; wherein the coherent optical receiver includes a 90-degree hybrid circuit, a photoelectric converter, and an impedance conversion amplifier, and selectively detects the signal light interfering with local oscillation light output by the local oscillator out of the optical multiplexed signals; and the variable optical attenuator is disposedType: ApplicationFiled: September 19, 2019Publication date: January 9, 2020Applicant: NEC CORPORATIONInventor: Kouichi SUZUKI
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Publication number: 20190342004Abstract: A coherent optical module includes an optical power monitor configured to monitor power of a wavelength multiplexed signal, a local oscillator configured to output a local oscillation light with an optical power corresponding to the monitored power of the wavelength multiplexed signal, a coherent receiver configured to receive an optical signal from the wavelength multiplexed signal by an interference with the local oscillation light, and a converter configured to convert the received optical signal to an electrical signal.Type: ApplicationFiled: July 22, 2019Publication date: November 7, 2019Inventors: Masao Morie, Kouichi Suzuki
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Publication number: 20190334416Abstract: A motor includes an annular sensor magnet rotated integrally with a rotation shaft of a rotor by a bushing, and a rotation detector arranged opposed to the sensor magnet to detect rotation information of the rotor. The bushing includes an annular fixing portion, which is fixed to the rotation shaft, and an extension, which extends from the fixing portion in an axial direction of the rotation shaft and is embedded in the sensor magnet. The extension includes an axial engagement portion engaged with the sensor magnet in the axial direction inside the sensor magnet.Type: ApplicationFiled: February 19, 2018Publication date: October 31, 2019Applicant: DENSO CORPORATIONInventors: Toshiyuki KITAI, Kouichi SUZUKI
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Patent number: 10454589Abstract: In a coherent optical receiver device, the dynamic range considerably decreases in the case of selectively receiving the optical multiplexed signals by means of the wavelength of the local oscillator light, therefore, a coherent optical receiver device according to an exemplary aspect of the invention includes a coherent optical receiver receiving optical multiplexed signals in a lump in which signal light is multiplexed; a variable optical attenuator; a local oscillator connected to the coherent optical receiver; and a first controller controlling the variable optical attenuator by means of a first control signal based on an output signal of the coherent optical receiver; wherein the coherent optical receiver includes a 90-degree hybrid circuit, a photoelectric converter, and an impedance conversion amplifier, and selectively detects the signal light interfering with local oscillation light output by the local oscillator out of the optical multiplexed signals; and the variable optical attenuator is disposedType: GrantFiled: June 21, 2018Date of Patent: October 22, 2019Assignee: NEC CORPORATIONInventor: Kouichi Suzuki
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Patent number: 10389440Abstract: A coherent optical receiver device includes a first unit configured to output local oscillation light having a predetermined wavelength, a second unit configured to receive an optical signal to have been inputted by making the optical signal interfere with the local oscillation light, a third unit configured to process electrically the optical signal received by the second unit, a fourth unit configured to monitor at least a part of power of the optical signal, and a fifth unit configured to control power of the local oscillation light output by the first unit depending on an optical power monitored by the fourth unit.Type: GrantFiled: January 29, 2016Date of Patent: August 20, 2019Assignee: NEC CORPORATIONInventors: Masao Morie, Kouichi Suzuki
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Publication number: 20180302169Abstract: In a coherent optical receiver device, the dynamic range considerably decreases in the case of selectively receiving the optical multiplexed signals by means of the wavelength of the local oscillator light, therefore, a coherent optical receiver device according to an exemplary aspect of the invention includes a coherent optical receiver receiving optical multiplexed signals in a lump in which signal light is multiplexed; a variable optical attenuator; a local oscillator connected to the coherent optical receiver; and a first controller controlling the variable optical attenuator by means of a first control signal based on an output signal of the coherent optical receiver; wherein the coherent optical receiver includes a 90-degree hybrid circuit, a photoelectric converter, and an impedance conversion amplifier, and selectively detects the signal light interfering with local oscillation light output by the local oscillator out of the optical multiplexed signals; and the variable optical attenuator is disposedType: ApplicationFiled: June 21, 2018Publication date: October 18, 2018Applicant: NEC CORPORATIONInventor: Kouichi SUZUKI
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Patent number: 10033468Abstract: In a coherent optical receiver device, the dynamic range considerably decreases in the case of selectively receiving the optical multiplexed signals by means of the wavelength of the local oscillator light, therefore, a coherent optical receiver device according to an exemplary aspect of the invention includes a coherent optical receiver receiving optical multiplexed signals in a lump in which signal light is multiplexed; a variable optical attenuator; a local oscillator connected to the coherent optical receiver; and a first controller controlling the variable optical attenuator by means of a first control signal based on an output signal of the coherent optical receiver; wherein the coherent optical receiver includes a 90-degree hybrid circuit, a photoelectric converter, and an impedance conversion amplifier, and selectively detects the signal light interfering with local oscillation light output by the local oscillator out of the optical multiplexed signals; and the variable optical attenuator is disposedType: GrantFiled: April 30, 2015Date of Patent: July 24, 2018Assignee: NEC CORPORATIONInventor: Kouichi Suzuki
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Patent number: 9515743Abstract: In a receiver, a reception front end receives a polarization-scrambled polarization multiplexed optical signal, polarization-separates the received polarization multiplexed optical signal, and converts each signal into quantized signals. A digital signal processor samples the quantized signals, demodulates the signals by using a polarization separation digital signal processing algorithm, and outputs demodulated signals. When phase and amplitude variations of the demodulated signals are greater than a predetermined value, a control circuit causes the digital signal processor to interrupt processing using the polarization separation digital signal processing algorithm, changes an initial value of a filter coefficient, and then causes the digital signal processor to start the processing using the polarization separation digital signal processing algorithm.Type: GrantFiled: March 1, 2013Date of Patent: December 6, 2016Assignee: NEC CorporationInventor: Kouichi Suzuki
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Publication number: 20160164602Abstract: A coherent optical receiver device includes a first unit configured to output local oscillation light having a predetermined wavelength, a second unit configured to receive an optical signal to have been inputted by making the optical signal interfere with the local oscillation light, a third unit configured to process electrically the optical signal received by the second unit, a fourth unit configured to monitor at least a part of power of the optical signal, and a fifth unit configured to control power of the local oscillation light output by the first unit depending on an optical power monitored by the fourth unit.Type: ApplicationFiled: January 29, 2016Publication date: June 9, 2016Inventors: MASAO MORIE, Kouichi Suzuki
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Patent number: 9337936Abstract: An object of the invention is to provide an optical transmission apparatus capable of reducing the influence of nonlinear effect of an optical fiber, suppressing a band requested to a device from being widened, easily bias controlling a modulator, and flexibly switching plural modulation methods. An optical transmission apparatus 301 according to the invention includes a modulator 101 and a controller 102. The modulator 101 is a modulator capable of quadrapture phase-shift keying the light from a light source and outputting the light. The controller 102 controls the input signal to the modulator 101 and causes the modulator 101 to carry out a quadrapture phase-shift keying operation or a ?/2 shift binary phase-shift keying operation.Type: GrantFiled: March 14, 2014Date of Patent: May 10, 2016Assignee: NEC CORPORATIONInventors: Kumi Ito, Kouichi Suzuki
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Patent number: 9264142Abstract: In an optical transmission system using an RZ code, in order to improve the quality of the modulated transmission signal, an RZ optical modulator includes an RZ carver that outputs a optical pulse train of the RZ code, a polarization adjustment device which improves and outputs a polarization extinction ratio of optical pulse train outputted from the RZ carver and an optical modulator which modulates and outputs the optical pulse train outputted from a polarization adjustment device.Type: GrantFiled: June 21, 2012Date of Patent: February 16, 2016Assignee: NEC CORPORATIONInventors: Kouichi Suzuki, Masao Morie