Patents by Inventor Setsuo Yoshida

Setsuo Yoshida 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).

  • Patent number: 11050484
    Abstract: An optical transmission apparatus, includes, a light source configured to output a plurality of light beams having different wavelengths to an optical fiber, a receiver configured to receive, from the optical fiber, a reflected light beam corresponding to each of the wavelengths of the plurality of light beams, and a signal processing circuit configured to estimate a polarization fluctuation portion based on a polarization state of the received reflected light beam corresponding to each of the plurality of wavelengths.
    Type: Grant
    Filed: February 4, 2020
    Date of Patent: June 29, 2021
    Assignee: FUJITSU LIMITED
    Inventors: Shoichiro Oda, Setsuo Yoshida
  • Patent number: 10999659
    Abstract: An optical network device receives an optical signal, to which polarization information is added, from a transmitter via a transmission line. The receiver generates electric-field-information signal of the optical signal. The processor acquires, for respective polarization rotation amounts, the electric-field-information signal during a period specified by the polarization information. The processor calculates, for respective polarization rotation amounts and based on the electric-field-information signal, evaluation values corresponding to powers of the optical signal at a plurality of positions on the transmission line. The processor calculates, for respective positions, variations in the evaluation values corresponding to the polarization rotation amounts.
    Type: Grant
    Filed: July 24, 2020
    Date of Patent: May 4, 2021
    Assignee: FUJITSU LIMITED
    Inventors: Kazuyuki Tajima, Takahito Tanimura, Setsuo Yoshida, Takeshi Hoshida
  • Publication number: 20210092498
    Abstract: An optical network device receives an optical signal, to which polarization information is added, from a transmitter via a transmission line. The receiver generates electric-field-information signal of the optical signal. The processor acquires, for respective polarization rotation amounts, the electric-field-information signal during a period specified by the polarization information. The processor calculates, for respective polarization rotation amounts and based on the electric-field-information signal, evaluation values corresponding to powers of the optical signal at a plurality of positions on the transmission line. The processor calculates, for respective positions, variations in the evaluation values corresponding to the polarization rotation amounts.
    Type: Application
    Filed: July 24, 2020
    Publication date: March 25, 2021
    Applicant: FUJITSU LIMITED
    Inventors: KAZUYUKI TAJIMA, Takahito Tanimura, Setsuo Yoshida, Takeshi Hoshida
  • Patent number: 10797799
    Abstract: An optical transmission apparatus includes a wavelength variable filter whose transmission light wavelength is variable; a receiver that receives light, the light being sent from another optical transmission apparatus and passing through the wavelength variable filter; a transmitter that sends to the another optical transmission apparatus, a utilization permission request for a second wavelength corresponding to a first wavelength of the light received by the receiver, the transmitter sending the utilization permission request as light of the second wavelength and in a form of a tone signal of a predetermined frequency; and a controller that, when receiving from the another optical transmission apparatus, a utilization permission notification of the second wavelength for a sender of the utilization permission request, configures a wavelength of a main signal to the second wavelength, the main signal being sent from the transmitter to the another optical transmission apparatus.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: October 6, 2020
    Assignee: FUJITSU LIMITED
    Inventors: Goji Nakagawa, Kyosuke Sone, Yoshio Hirose, Takeshi Hoshida, Setsuo Yoshida
  • Patent number: 10752977
    Abstract: To provide a palladium separating agent capable of separating palladium ions from a solution containing palladium ions of a low concentration to a high concentration in a short time with a high selectivity, and a method for separating palladium. A palladium separating agent having a functional group represented by the formula (1) bonded to a carrier: —Z—(CH2)n-S—R??(1) wherein R is a C1-18 chain hydrocarbon group, a C3-10 alicyclic hydrocarbon group, a C6-14 aromatic hydrocarbon group, a carboxymethyl group or a carboxyethyl group, n is an integer of from 1 to 4, and Z is an amide bond.
    Type: Grant
    Filed: October 5, 2012
    Date of Patent: August 25, 2020
    Assignee: TOSOH CORPORATION
    Inventors: Yukinori Sudo, Takahiro Masuda, Setsuo Yoshida
  • Publication number: 20200259562
    Abstract: An optical transmission apparatus, includes, a light source configured to output a plurality of light beams having different wavelengths to an optical fiber, a receiver configured to receive, from the optical fiber, a reflected light beam corresponding to each of the wavelengths of the plurality of light beams, and a signal processing circuit configured to estimate a polarization fluctuation portion based on a polarization state of the received reflected light beam corresponding to each of the plurality of wavelengths.
    Type: Application
    Filed: February 4, 2020
    Publication date: August 13, 2020
    Applicant: FUJITSU LIMITED
    Inventors: Shoichiro Oda, Setsuo Yoshida
  • Publication number: 20200110333
    Abstract: The present invention provides a forming apparatus that forms a composition on a substrate using a mold including a contact region to be brought into contact with the composition, comprising: a deformation unit configured to deform the contact region; and a controller configured to perform, for each of a first shot region and a second shot region on the substrate, a process of bringing the contact region and the composition on the substrate into contact with each other while controlling the deformation of the contact region, wherein an area where the mold faces the substrate during the process is different between the first and second shot regions, and wherein the controller is configured to change, between the first and second shot regions, a process condition for bringing the contact region and the composition into contact with each other.
    Type: Application
    Filed: October 3, 2019
    Publication date: April 9, 2020
    Inventors: Setsuo Yoshida, Tosiya Asano
  • Publication number: 20200036518
    Abstract: A communication device includes: a counter, a pseudo-random number generator, a symbol generator, a modulator, and a controller. The counter counts symbols transmitted to a correspondent device. The pseudo-random number generator generates a pseudo-random number corresponding to a count value of the counter. The symbol generator generates a transmission symbol from a transmission signal and the pseudo-random number. The modulator generates a modulated signal from the transmission symbol. When a disruption of a communication with the correspondent device is detected, the controller selects, from among a plurality of restoring times determined in advance, a restoring time for resuming the communication, and gives the counter a count value assigned in advance to the selected restoring time. The counter resumes a counting operation from the count value given from the controller when the communication device resumes a communication with the correspondent device.
    Type: Application
    Filed: July 9, 2019
    Publication date: January 30, 2020
    Applicant: FUJITSU LIMITED
    Inventors: Shoichiro Oda, Setsuo Yoshida
  • Patent number: 10396900
    Abstract: A method of controlling a transmission signal, includes transmitting a training signal including four polarization states having a given relation; and performing rotation control and transmission power level control of a polarization component of a data signal, based on a rotation control matrix for a polarization state and an inverse-operation control matrix for a power level imbalance, which are estimated from Stokes parameters related to input power level present on a Poincare sphere acquired from the training signal and Stokes parameters related to output power level present on the Poincare sphere.
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: August 27, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Guoxiu Huang, Setsuo Yoshida, Takeshi Hoshida, Hisao Nakashima, Shoichiro Oda
  • Patent number: 10389437
    Abstract: An optical signal-to-noise ratio measurement device includes a measurement unit and a determination unit and measures an optical signal-to-noise ratio of an optical signal including a fixed pattern in a specified cycle. The measurement unit measures an optical signal-to-noise ratio of the optical signal respectively in a plurality of time sections in a measurement period so as to generate a plurality of measured values, a length of the measurement period being the same or substantially the same as a length of the specified cycle. The determination unit selects, from the plurality of measured values generated by the measurement unit, at least one measured value other than a worst measured value in the plurality of measured values, and determines an optical signal-to-noise ratio of the optical signal based on the selected at least one measured value.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: August 20, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Setsuo Yoshida, Shoichiro Oda
  • Publication number: 20190250507
    Abstract: An imprint apparatus comprises a mold holder configured to move while holding the mold, and a substrate holder including a plurality of suction regions for chucking the substrate and configured to move while holding the substrate. When performing the mold separation, among the plurality of suction regions, a suction force of a suction region at a position where the mold is to be separated from the imprint material is made weaker than a suction force of a suction region on a peripheral side of the substrate than the position where the mold is to be separated, and the mold holder is tilted after at least one of the mold holder and the substrate holder is moved by a predetermined amount so as to widen a gap between the mold and the substrate.
    Type: Application
    Filed: April 23, 2019
    Publication date: August 15, 2019
    Inventors: Setsuo Yoshida, Noriyasu Hasegawa
  • Patent number: 10374701
    Abstract: An optical signal-to-noise ratio (OSNR) measuring device includes a processor, wherein the processor executes a process. The process includes: converting an optical signal to an electrical signal; first acquiring a signal intensity from the electrical signal; second acquiring a noise intensity of a predetermined frequency band from the electrical signal; performing a digital conversion on the noise intensity; and computing an OSNR of the optical signal based on the signal intensity and the converted noise intensity. The predetermined frequency band is a frequency band including a folding noise that occurs when the digital conversion is performed.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: August 6, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Shoichiro Oda, Setsuo Yoshida, Keisuke Harada
  • Patent number: 10333762
    Abstract: There is provided a transmitter configured to transmit a symbol in a constellation, the symbol corresponding to data to be transmitted, the transmitter including a memory in which key information for generating pseudo random numbers are stored, and a processor coupled to the memory and configured to generate a pseudo random number every the symbol, select data patterns every data areas in which information of types of a data pattern are arranged, based on the pseudo random number, so that a distance between the data patterns to be selected is more than a predetermined value on a plane on which the data areas are continuously arranged every a horizontal axis and a vertical axis of the constellation, and determine the symbol to be transmitted, based on the selected data patterns according to a position of a data pattern corresponding to the data to be transmitted in the constellation.
    Type: Grant
    Filed: February 8, 2018
    Date of Patent: June 25, 2019
    Assignee: FUJITSU LIMITED
    Inventor: Setsuo Yoshida
  • Publication number: 20190165865
    Abstract: An optical transmission apparatus includes a wavelength variable filter whose transmission light wavelength is variable; a receiver that receives light, the light being sent from another optical transmission apparatus and passing through the wavelength variable filter; a transmitter that sends to the another optical transmission apparatus, a utilization permission request for a second wavelength corresponding to a first wavelength of the light received by the receiver, the transmitter sending the utilization permission request as light of the second wavelength and in a form of a tone signal of a predetermined frequency; and a controller that, when receiving from the another optical transmission apparatus, a utilization permission notification of the second wavelength for a sender of the utilization permission request, configures a wavelength of a main signal to the second wavelength, the main signal being sent from the transmitter to the another optical transmission apparatus.
    Type: Application
    Filed: October 25, 2018
    Publication date: May 30, 2019
    Applicant: FUJITSU LIMITED
    Inventors: GOJI NAKAGAWA, Kyosuke Sone, Yoshio Hirose, Takeshi Hoshida, Setsuo Yoshida
  • Patent number: 10268227
    Abstract: A transmission apparatus including: a branch circuit that branches a signal including first data and second data superimposed on the first data into two signals; a limiting amplifier that amplifies one signal in the two signals; a linear amplifier that amplifies another signal in the two signals; a first detector that detects the first data from the amplified one signal; and a second detector that detects the second data from the amplified another signal and the amplified one signal.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: April 23, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Goji Nakagawa, Setsuo Yoshida
  • Patent number: 10230463
    Abstract: A transmitter generates a frequency-modulated CW light so as to transmit it to a path. A receiver receives the CW light that has passed through passband filters included in the path. The receiver includes a processor. The processor measures an optical power of the received CW light every time a center frequency of the CW light is changed and transmitted by the transmitter. The processor calculates transmission characteristics of the CW light that has passed through the passband filters, on the basis of an average value of the optical power that corresponds to a center frequency of the CW light and on the basis of an amplitude component that indicates an amount of change in the optical power, the average value and the amplitude component being obtained as a result of the measurement.
    Type: Grant
    Filed: August 3, 2016
    Date of Patent: March 12, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Guoxiu Huang, Yasuhiko Aoki, Shoichiro Oda, Zhenning Tao, Setsuo Yoshida, Kyosuke Sone
  • Patent number: 10158422
    Abstract: There is provided an apparatus configured to estimate optical transmission performance in a transmission path of an optical signal, the apparatus including a memory, and a processor coupled to the memory and the processor configured to acquire a first index related to a first transmission performance of an optical signal transmitted through a span group between a first node and an n-th node and a second index related to a second transmission performance of an optical signal transmitted through a span or a span group between the first node and an m-th node, wherein n is an integer of 3 or more, and m is the integer satisfying m<n, and estimate a third index related to a third transmission performance of an optical signal to be transmitted through a span between the m-th node and the n-th node, based on the first index and the second index.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: December 18, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Shoichiro Oda, Masatake Miyabe, Setsuo Yoshida, Yasuhiko Aoki, Toru Katagiri, Goji Nakagawa, Shigeru Ishii, Yutaka Takita
  • Publication number: 20180337727
    Abstract: An optical signal-to-noise ratio measurement device includes a measurement unit and a determination unit and measures an optical signal-to-noise ratio of an optical signal including a fixed pattern in a specified cycle. The measurement unit measures an optical signal-to-noise ratio of the optical signal respectively in a plurality of time sections in a measurement period so as to generate a plurality of measured values, a length of the measurement period being the same or substantially the same as a length of the specified cycle. The determination unit selects, from the plurality of measured values generated by the measurement unit, at least one measured value other than a worst measured value in the plurality of measured values, and determines an optical signal-to-noise ratio of the optical signal based on the selected at least one measured value.
    Type: Application
    Filed: May 14, 2018
    Publication date: November 22, 2018
    Applicant: FUJITSU LIMITED
    Inventors: Setsuo Yoshida, Shoichiro Oda
  • Patent number: 10095117
    Abstract: An imprint apparatus molds an uncured resin on a substrate and cures the resin to form a pattern of the cured resin on the substrate. The apparatus includes a mold holding unit that holds the mold, a substrate holding unit that holds the substrate, a deforming unit that deforms the mold held by the mold holding unit into a convex shape toward the substrate, a driving unit that changes an attitude of the mold or the substrate during a releasing operation in which the mold deformed into the convex shape is released from the resin to thereby make the position of a contact region at which the mold is brought into contact with the resin movable, a measuring unit that acquires image information indicating a state of the contact region, and a control unit configured to control the operation of the driving unit based on the image information.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: October 9, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Zenichi Hamaya, Noriyasu Hasegawa, Setsuo Yoshida, Yoshihiro Shiode
  • Publication number: 20180278336
    Abstract: A method of controlling a transmission signal, includes transmitting a training signal including four polarization states having a given relation; and performing rotation control and transmission power level control of a polarization component of a data signal, based on a rotation control matrix for a polarization state and an inverse-operation control matrix for a power level imbalance, which are estimated from Stokes parameters related to input power level present on a Poincare sphere acquired from the training signal and Stokes parameters related to output power level present on the Poincare sphere.
    Type: Application
    Filed: March 16, 2018
    Publication date: September 27, 2018
    Applicant: FUJITSU LIMITED
    Inventors: GUOXIU HUANG, Setsuo Yoshida, Takeshi Hoshida, Hisao Nakashima, Shoichiro Oda