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).

  • Publication number: 20150117871
    Abstract: An optical level control apparatus includes an input port, an output port, an optical device to assume a state of outputting light inputted to the input port from the output port and a state of not outputting the light inputted to the input port from the output port; a detector to detect an intensity of the light inputted to the input port, and a control unit to detect an input of an optical burst signal to the input port on the basis of a result of detecting the intensity of the light and to control the optical device so that the signal, in which to eliminate a field extending up to an elapse of a period of first time equal to or shorter than laser ON time period of the signal from a head of the signal with its input being detected, is output from the output port.
    Type: Application
    Filed: September 30, 2014
    Publication date: April 30, 2015
    Applicant: FUJITSU LIMITED
    Inventors: Setsuo YOSHIDA, Keisuke Harada
  • Patent number: 9019593
    Abstract: An optical amplification apparatus includes a front-stage semiconductor optical amplifier which amplifies an input light and a rear-stage semiconductor optical amplifier which amplifies an amplified light outputted from the front-stage semiconductor optical amplifier. The front-stage semiconductor optical amplifier exercises auto level control of an output light by exercising variable control of driving current which flows according to applied voltage higher than light emitting threshold voltage of an internal optical amplification element. The rear-stage semiconductor optical amplifier performs gate switching of a transmitted light by exercising switching control of driving current. By doing so, distortion of a waveform is controlled and optical communication quality can be improved.
    Type: Grant
    Filed: March 12, 2012
    Date of Patent: April 28, 2015
    Assignee: Fujitsu Limited
    Inventors: Setsuo Yoshida, Susumu Kinoshita, George Ishikawa, Goji Nakagawa, Yutaka Kai, Kyosuke Sone, Keisuke Harada
  • Patent number: 8977131
    Abstract: An optical apparatus receives an upward signal light from a plurality of subscriber units, where the upward signal light is composed of a plurality of time slots corresponding to the plurality of optical subscriber units. The optical apparatus includes a driving unit configured to determine a respective required gain for light from each of the plurality of optical subscriber units, an amplifying section configured to amplify the upward signal light with the required gain corresponding to the time slots of the upward signal light, and a receiver configured to receive the amplified upward signal light.
    Type: Grant
    Filed: February 17, 2009
    Date of Patent: March 10, 2015
    Assignee: Fujitsu Limited
    Inventors: Setsuo Yoshida, Susumu Kinoshita
  • Patent number: 8937762
    Abstract: A level control circuit that generates output signal for level control includes: a control information storage that stores control information corresponding to a signal level, a control information circuit that outputs the output signal for level control corresponding to the signal level of a first input signal based on the control information stored in the control information storage; and an information update circuit that updates the control information of the control information storage according to the signal level of a second input signal.
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: January 20, 2015
    Assignee: Fujitsu Limited
    Inventors: Yutaka Kai, Setsuo Yoshida, Taku Yoshida, Keisuke Harada
  • Publication number: 20140248198
    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: Application
    Filed: October 5, 2012
    Publication date: September 4, 2014
    Applicant: TOSOH CORPORATION
    Inventors: Yukinori Sudo, Takahiro Masuda, Setsuo Yoshida
  • Patent number: 8824043
    Abstract: An optical output level control apparatus includes a detector configured to detect power of an input optical signal; an amplifier configured to amplify the input optical signal; a memory configured to store data that define a first curved line representing a relationship between the input power and a drive voltage of the amplifier for obtaining a first output level and data that defines a second curved line representing a relationship between the input power and the drive voltage of the amplifier for obtaining a second output level; a generator configured to correct at least one of the first and second curved lines and generate a target curved line representing a relationship between input power and a drive voltage of the amplifier for obtaining a target output level through interpolation based on the first and second curved lines at least one of which is corrected.
    Type: Grant
    Filed: July 24, 2013
    Date of Patent: September 2, 2014
    Assignee: Fujitsu Limited
    Inventors: Setsuo Yoshida, Taku Yoshida, Keisuke Harada, Yutaka Kai
  • Patent number: 8749878
    Abstract: An apparatus including a semiconductor optical amplifier configured to amplify an input optical signal, and a controller configured to supply preheat current to the semiconductor optical amplifier when the input optical signal is not input to the semiconductor optical amplifier.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: June 10, 2014
    Assignee: Fujitsu Limited
    Inventor: Setsuo Yoshida
  • Publication number: 20140139909
    Abstract: An optical amplification device includes: a plurality of semiconductor optical amplifiers to which an optical burst signal is input at a different timing; an optical coupler that combines output signals output from the plurality of semiconductor optical amplifiers; a detection unit that detects an optical inputting to the plurality of semiconductor optical amplifiers; and a control unit that activates one of the semiconductor optical amplifiers where the optical inputting is detected, inactivates the other semiconductor optical amplifier, and remains the activation until another optical inputting is detected in the other semiconductor optical amplifier.
    Type: Application
    Filed: November 6, 2013
    Publication date: May 22, 2014
    Applicant: FUJITSU LIMITED
    Inventors: Susumu KINOSHITA, Setsuo YOSHIDA
  • Patent number: 8678808
    Abstract: The imprint apparatus of the present invention molds an imprint material on a substrate using a mold and cures the imprint material to form a pattern on the substrate. The apparatus includes a holder configured to attract the mold to hold the mold; and a pressure reduction device configured to reduce a back pressure of the mold held by the holder, wherein the apparatus is configured to reduce the back pressure by the pressure reduction device in parallel with release of the mold from the imprint material.
    Type: Grant
    Filed: October 7, 2011
    Date of Patent: March 25, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Setsuo Yoshida, Noriyasu Hasegawa, Yoshihiro Shiode, Tatsuya Hayashi
  • Publication number: 20140078579
    Abstract: An optical output level control apparatus includes a detector configured to detect power of an input optical signal; an amplifier configured to amplify the input optical signal; a memory configured to store data that define a first curved line representing a relationship between the input power and a drive voltage of the amplifier for obtaining a first output level and data that defines a second curved line representing a relationship between the input power and the drive voltage of the amplifier for obtaining a second output level; a generator configured to correct at least one of the first and second curved lines and generate a target curved line representing a relationship between input power and a drive voltage of the amplifier for obtaining a target output level through interpolation based on the first and second curved lines at least one of which is corrected.
    Type: Application
    Filed: July 24, 2013
    Publication date: March 20, 2014
    Applicant: FUJITSU LIMITED
    Inventors: Setsuo YOSHIDA, Taku Yoshida, Keisuke Harada, Yutaka Kai
  • Patent number: 8670639
    Abstract: An optical-switch driver circuit includes a pulse signal source and a voltage-applying circuit. The pulse signal source generates pulse waves that rise from a first voltage to a second voltage. The voltage-applying circuit, for one of the pulse waves, outputs a voltage higher than the third voltage, then outputs a voltage lower than the third voltage, and further outputs the third voltage.
    Type: Grant
    Filed: November 14, 2011
    Date of Patent: March 11, 2014
    Assignee: Fujitsu Limited
    Inventors: Setsuo Yoshida, Hiroyuki Kadosono
  • Patent number: 8609281
    Abstract: Electrolytic manganese dioxide characterized by having a surface sulfate (SO4) content of smaller than 0.10% by weight and a JIS-pH value, as measured according to JIS K1467, of at least 1.5 but smaller than 3.5, preferably at least 2.1 but smaller than 3.2 is provided. Preferably 3% to 25% in number of the fine particles of the manganese dioxide have a particle diameter of not larger than 1 ?m. A battery provided with a cathode made from the electrolytic manganese dioxide as active material exhibits good high-rate discharge characteristics and good resistance to metal corrosion.
    Type: Grant
    Filed: June 6, 2007
    Date of Patent: December 17, 2013
    Assignee: Tosoh Corporation
    Inventors: Kenichi Takahashi, Kazumasa Suetsugu, Setsuo Yoshida
  • Patent number: 8564878
    Abstract: An optical amplifier includes a semiconductor optical amplifier, a power monitor configured to monitor an optical power of out-of-signal-band noise output from the semiconductor optical amplifier, and a corrector configured to correct a relationship between a driving current for the semiconductor optical amplifier and a noise optical power based on the out-of-signal-band noise optical power monitored by the first power monitor.
    Type: Grant
    Filed: November 16, 2010
    Date of Patent: October 22, 2013
    Assignee: Fujitsu Limited
    Inventors: Setsuo Yoshida, Kyosuke Sone
  • Publication number: 20130056905
    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: Application
    Filed: September 5, 2012
    Publication date: March 7, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Zenichi Hamaya, Noriyasu Hasegawa, Setsuo Yoshida, Yoshihiro Shiode
  • Publication number: 20130056904
    Abstract: An imprint apparatus includes a deforming unit configured to deform the mold held by the mold holding unit into a convex shape toward the substrate; a driving unit configured to change an attitude of the mold or the substrate during a pressing in which the mold deformed is pressed against the uncured resin to thereby make a position of a contact region at which the mold is brought into contact with the uncured resin movable; a control unit configured to calculate a plane coordinates of a centroid of the contact region based on an image information of the contact region acquired by a measuring unit and to control an operation of the driving unit such that the plane coordinates position of the centroid is directed toward the plane coordinates position of the centroid of a pattern-forming region on the substrate, which has been calculated or has been acquired in advance.
    Type: Application
    Filed: September 5, 2012
    Publication date: March 7, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Zenichi Hamaya, Noriyasu Hasegawa, Setsuo Yoshida, Yoshihiro Shiode
  • Publication number: 20120293228
    Abstract: A level control circuit that generates output signal for level control includes: a control information storage that stores control information corresponding to a signal level, a control information circuit that outputs the output signal for level control corresponding to the signal level of a first input signal based on the control information stored in the control information storage; and an information update circuit that updates the control information of the control information storage according to the signal level of a second input signal.
    Type: Application
    Filed: April 19, 2012
    Publication date: November 22, 2012
    Applicant: FUJITSU LIMITED
    Inventors: Yutaka KAI, Setsuo YOSHIDA, Taku YOSHIDA, Keisuke HARADA
  • Patent number: 8310750
    Abstract: A waveform shaping circuit enhances a rise of a waveform of a voltage applied to a load and includes an input unit to which the voltage is input; a supply unit configured to apply the voltage input from the input unit to the load; a first resistor connected in series between the input unit and the supply unit; a second resistor branch-connected to a portion between the input unit and the supply unit; and a stub connected to the first resistor or the second resistor and including a transmission path of a given length configured to shuttle the voltage by transmitting and reflecting the voltage as a voltage wave.
    Type: Grant
    Filed: November 17, 2010
    Date of Patent: November 13, 2012
    Assignee: Fujitsu Limited
    Inventor: Setsuo Yoshida
  • Publication number: 20120257272
    Abstract: An optical amplification apparatus includes a front-stage semiconductor optical amplifier which amplifies an input light and a rear-stage semiconductor optical amplifier which amplifies an amplified light outputted from the front-stage semiconductor optical amplifier. The front-stage semiconductor optical amplifier exercises auto level control of an output light by exercising variable control of driving current which flows according to applied voltage higher than light emitting threshold voltage of an internal optical amplification element. The rear-stage semiconductor optical amplifier performs gate switching of a transmitted light by exercising switching control of driving current. By doing so, distortion of a waveform is controlled and optical communication quality can be improved.
    Type: Application
    Filed: March 12, 2012
    Publication date: October 11, 2012
    Applicant: FUJITSU LIMITED
    Inventors: Setsuo YOSHIDA, Susumu Kinoshita, George Ishikawa, Goji Nakagawa, Yutaka Kai, Kyosuke Sone, Keisuke Harada
  • Publication number: 20120121219
    Abstract: An optical-switch driver circuit includes a pulse signal source and a voltage-applying circuit. The pulse signal source generates pulse waves that rise from a first voltage to a second voltage. The voltage-applying circuit, for one of the pulse waves, outputs a voltage higher than the third voltage, then outputs a voltage lower than the third voltage, and further outputs the third voltage.
    Type: Application
    Filed: November 14, 2011
    Publication date: May 17, 2012
    Applicant: FUJITSU LIMITED
    Inventors: Setsuo YOSHIDA, Hiroyuki KADOSONO
  • Patent number: 8179593
    Abstract: An optical-switch drive circuit including a driver unit that generates, in response to a control signal, an on/off signal for driving a semiconductor optical amplifier gate switch, and a buffer unit having a high input impedance and connected between an output terminal outputting the on/off signal and the semiconductor optical amplifier gate switch. In the optical-switch drive circuit the buffer unit may include a high-resistance voltage divider that is connected with the output terminal, and an operational amplifier that buffers, and provides to the semiconductor optical amplifier gate switch, a divided voltage of the voltage divider.
    Type: Grant
    Filed: March 18, 2009
    Date of Patent: May 15, 2012
    Assignee: Fujitsu Limited
    Inventors: Masaji Noguchi, Yutaka Kai, Setsuo Yoshida