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).
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Publication number: 20150117871Abstract: 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: ApplicationFiled: September 30, 2014Publication date: April 30, 2015Applicant: FUJITSU LIMITEDInventors: Setsuo YOSHIDA, Keisuke Harada
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Patent number: 9019593Abstract: 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: GrantFiled: March 12, 2012Date of Patent: April 28, 2015Assignee: Fujitsu LimitedInventors: Setsuo Yoshida, Susumu Kinoshita, George Ishikawa, Goji Nakagawa, Yutaka Kai, Kyosuke Sone, Keisuke Harada
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Patent number: 8977131Abstract: 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: GrantFiled: February 17, 2009Date of Patent: March 10, 2015Assignee: Fujitsu LimitedInventors: Setsuo Yoshida, Susumu Kinoshita
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Patent number: 8937762Abstract: 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: GrantFiled: April 19, 2012Date of Patent: January 20, 2015Assignee: Fujitsu LimitedInventors: Yutaka Kai, Setsuo Yoshida, Taku Yoshida, Keisuke Harada
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Publication number: 20140248198Abstract: 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: ApplicationFiled: October 5, 2012Publication date: September 4, 2014Applicant: TOSOH CORPORATIONInventors: Yukinori Sudo, Takahiro Masuda, Setsuo Yoshida
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Patent number: 8824043Abstract: 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: GrantFiled: July 24, 2013Date of Patent: September 2, 2014Assignee: Fujitsu LimitedInventors: Setsuo Yoshida, Taku Yoshida, Keisuke Harada, Yutaka Kai
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Patent number: 8749878Abstract: 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: GrantFiled: February 12, 2010Date of Patent: June 10, 2014Assignee: Fujitsu LimitedInventor: Setsuo Yoshida
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Publication number: 20140139909Abstract: 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: ApplicationFiled: November 6, 2013Publication date: May 22, 2014Applicant: FUJITSU LIMITEDInventors: Susumu KINOSHITA, Setsuo YOSHIDA
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Patent number: 8678808Abstract: 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: GrantFiled: October 7, 2011Date of Patent: March 25, 2014Assignee: Canon Kabushiki KaishaInventors: Setsuo Yoshida, Noriyasu Hasegawa, Yoshihiro Shiode, Tatsuya Hayashi
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Publication number: 20140078579Abstract: 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: ApplicationFiled: July 24, 2013Publication date: March 20, 2014Applicant: FUJITSU LIMITEDInventors: Setsuo YOSHIDA, Taku Yoshida, Keisuke Harada, Yutaka Kai
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Patent number: 8670639Abstract: 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: GrantFiled: November 14, 2011Date of Patent: March 11, 2014Assignee: Fujitsu LimitedInventors: Setsuo Yoshida, Hiroyuki Kadosono
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Patent number: 8609281Abstract: 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: GrantFiled: June 6, 2007Date of Patent: December 17, 2013Assignee: Tosoh CorporationInventors: Kenichi Takahashi, Kazumasa Suetsugu, Setsuo Yoshida
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Patent number: 8564878Abstract: 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: GrantFiled: November 16, 2010Date of Patent: October 22, 2013Assignee: Fujitsu LimitedInventors: Setsuo Yoshida, Kyosuke Sone
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Publication number: 20130056905Abstract: 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: ApplicationFiled: September 5, 2012Publication date: March 7, 2013Applicant: CANON KABUSHIKI KAISHAInventors: Zenichi Hamaya, Noriyasu Hasegawa, Setsuo Yoshida, Yoshihiro Shiode
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Publication number: 20130056904Abstract: 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: ApplicationFiled: September 5, 2012Publication date: March 7, 2013Applicant: CANON KABUSHIKI KAISHAInventors: Zenichi Hamaya, Noriyasu Hasegawa, Setsuo Yoshida, Yoshihiro Shiode
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Publication number: 20120293228Abstract: 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: ApplicationFiled: April 19, 2012Publication date: November 22, 2012Applicant: FUJITSU LIMITEDInventors: Yutaka KAI, Setsuo YOSHIDA, Taku YOSHIDA, Keisuke HARADA
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Patent number: 8310750Abstract: 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: GrantFiled: November 17, 2010Date of Patent: November 13, 2012Assignee: Fujitsu LimitedInventor: Setsuo Yoshida
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Publication number: 20120257272Abstract: 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: ApplicationFiled: March 12, 2012Publication date: October 11, 2012Applicant: FUJITSU LIMITEDInventors: Setsuo YOSHIDA, Susumu Kinoshita, George Ishikawa, Goji Nakagawa, Yutaka Kai, Kyosuke Sone, Keisuke Harada
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Publication number: 20120121219Abstract: 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: ApplicationFiled: November 14, 2011Publication date: May 17, 2012Applicant: FUJITSU LIMITEDInventors: Setsuo YOSHIDA, Hiroyuki KADOSONO
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Patent number: 8179593Abstract: 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: GrantFiled: March 18, 2009Date of Patent: May 15, 2012Assignee: Fujitsu LimitedInventors: Masaji Noguchi, Yutaka Kai, Setsuo Yoshida