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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Miyata; Hideyuki
Address:
Kawasaki, JP
No. of patents:
63
Patents:


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Patent Number Title Of Patent Date Issued
8582981 Optical transmitter and control method therefor November 12, 2013
The disclosed optical transmitter and control method include performing phase modulation of a light propagating through a corresponding optical path in accordance with a data signal, supplying bias voltages for regulating an operating point of each of phase modulation performed, impa
8170415 Physical wiring control device, physical wiring control method, and computer product May 1, 2012
An optical power information receiving unit receives optical power information transmitted from a power monitor. When it is judged that a new IT apparatus is connected to an optical switch, an optical switch control unit controls the optical switch to connect the IT apparatus and an
8121492 Optical transmitting apparatus February 21, 2012
An optical transmitting apparatus includes a modulating unit that branches an input light and performs independent phase modulation to branched optical signals of arms, a phase adjusting unit that changes a phase difference between the optical signals of respective arms according to
7953329 Optical communication apparatus and optical add/drop apparatus May 31, 2011
An apparatus comprising an optical modulator modulating a light in accordance with a modulation signal and an operating point of the optical modulator, to thereby output a modulated optical signal; and a controller controlling the operating point in accordance with a branched portion of
7853147 Information processing system, calculation node, and control method of information processing sy December 14, 2010
The present invention provides an information processing system, comprising a plurality of calculation nodes with an optical transmitter, which individually outputs a plurality of optical signals each having a different wavelength, and an optical receiver, which individually receives
7840141 Differential M phase-shift modulator November 23, 2010
The present invention is a miniaturized differential M phase-shift modulator (M=2.sup.n: n is 2 or more) in which a plurality of Mach-Zehnder type light modulators each adapted to output a DPSK-modulated signal light by applying a driving voltage signal are arranged in parallel and t
7826744 Optical network system and transmission apparatus November 2, 2010
An optical network system is disclosed by which flexible wavelength path setting can be performed in accordance with tree-shaped and star-shaped network topology. A central node includes a multiplexing section for multiplexing optical signals transmitted from user nodes and inputted
7773283 Optical modulation device and optical modulation method August 10, 2010
According to an aspect of an embodiment, an optical modulation device includes a Mach-Zehnder modulator and a controller. The Mach-Zehnder modulator is supplied a drive signal and a bias voltage. The Mach-Zehnder modulator modulates inputted light on the bases of the drive signal and
7761007 Optical network system and transmission apparatus July 20, 2010
An optical network system is disclosed by which flexible wavelength path setting can be performed in accordance with tree-shaped and star-shaped network topology. A central node includes a multiplexing section for multiplexing optical signals transmitted from user nodes and inputted
7734175 Network configuring apparatus June 8, 2010
An optical wiring switching unit includes a first connection interface. A packet switch includes a second connection interface. A resource includes a third connection interface, and is formed with at least one of a server and a storage device. A control device controls the optical wiring
7577368 Optical communication apparatus and optical add/drop apparatus August 18, 2009
An apparatus comprising an optical modulator modulating a light in accordance with a modulation signal and an operating point of the optical modulator, to thereby output a modulated optical signal; and a controller controlling the operating point in accordance with a branched portion of
7546043 Optical communication system June 9, 2009
Signal light with a specific wavelength is transmitted and extracted from signal light multiplexed by a WDM method, and a light detection unit detects the signal light detected by an optical tunable filter, whose wavelength transmission characteristic varies depending on a control si
7476038 Optical device module January 13, 2009
An optical device module includes an optical device, a soaking unit fixed to one surface of the optical device, a heating/cooling unit fixed to one surface of the soaking unit, a heat-insulating unit fixed to one surface of the heating/cooling unit, and a package that houses the optical
7447446 Light source apparatus, and method for switching redundancy of the light source November 4, 2008
The present invention relates to a light source apparatus. The light source apparatus includes a plurality of optical pulse train generation sections; an optical switch section capable of selectively outputting an optical pulse train to be taken as an optical pulse train for current
7443504 Arbitrary and endless polarization controller and polarization-mode dispersion compensator using October 28, 2008
A polarization controller is configured to comprise polarization state monitoring section for monitoring polarization states of input light and output light of a variable polarization light element; and a control section, when the positions on a Poincare sphere expressing each of the
7406262 Optical transmission device July 29, 2008
An optical transmission device improved in quality and reliability of OADM function and permitting configuration of highly-flexible, economical OADM networks. A wavelength tunable filter variably selects a wavelength according to a control frequency. A filter controller applies the contr
7389054 Optical communication apparatus and optical add/drop apparatus June 17, 2008
The present invention relates to an optical communication apparatus for detecting the intensity of light in an optical modulator or the intensity of a modulation signal and for controlling the operating point of the optical modulator based on the result of detection. In the optical c
7366426 Optical add/drop multiplexer using tunable filter and method for feedback controlling the tunabl April 29, 2008
A wavelength stabilizing filter has a wavelength transmission characteristic curve that has its peak in a wavelength located between a first continuous set band and a second continuous set band longer in wavelength than the first set band, and that linearly drops from the peak toward
7362925 Control method and control apparatus of optical device April 22, 2008
The present invention aims at providing a control method and a control apparatus for controlling the operation setting of an optical device with high accuracy, so as to reliably obtain characteristics according to a desired relationship to be set corresponding to a signal light, imme
7349632 Method of wavelength selection control and wavelength variable filter device March 25, 2008
A method of wavelength selection control is disclosed. The method includes detecting reference RF frequencies by varying the frequency of a RF signal supplied to a reference acousto-optic tunable filter with the reference RF frequencies corresponding to reference wavelengths of refer
7187814 Optical add/drop device March 6, 2007
A drop-type AOTF is used as a configuration for removing from a through signal an optical signal having the same wavelength as that of an optical signal to be added. To the drop-type AOTF, RF signals are input to always select all of wavelengths, and an RF signal is not input for a wavel
7181094 Apparatus for controlling acousto-optic tunable filter and method of selecting wavelength February 20, 2007
A radio-frequency-signal generator generates an RF signal. An optical monitor monitors a first intensity of a reference signal and a second intensity of a drop signal. A reference-frequency determining unit determines, based on the first intensity, a first frequency of an RF signal t
7151866 Optical device module December 19, 2006
An optical device module includes an optical device with a plurality of electrodes disposed at predetermined positions, a substrate disposed oppositely to the optical device and with wiring patterns for connecting to the electrodes, and a wiring which connects the electrodes to the w
7120321 Control method and device for optical filter October 10, 2006
The present invention relates to a control method and device for an optical filter, and a primary object of the present invention is to achieve accurate tracking control of the optical filter. Disclosed herein is a control method for an optical filter including first and second optic
7079728 Wavelength multiplexing processing apparatus July 18, 2006
A wavelength multiplexing processing apparatus for use with a wavelength division multiplexing system is disclosed which uses a single AWG to achieve reduction in cost, size and loss. The wavelength multiplexing processing apparatus includes a waveguide device wherein a plurality of
7061669 Optical apparatus with loss compensation capability and optical amplifier for loss compensation June 13, 2006
An optical apparatus having a loss compensation capability includes between an input connector 1A and an output connector 1B an input side optical parts 2 including an input monitor, an amplification medium 3, a loss medium 4, and an output side optical parts 5 including an output mo
7020399 Optical transmission apparatus and method which adjust rise and fall time of signal light to be March 28, 2006
An optical transmission apparatus and method for changing a rise time (t.sub.r) and fall time (t.sub.f) of a signal light to be transmitted, to reduce wavelength dispersion characteristics and nonlinear effect of a transmission path. A transmitter includes a t.sub.rt.sub.f adjusting
7006771 Optical communication apparatus and optical add/drop apparatus February 28, 2006
The present invention relates to an optical communication apparatus for detecting the intensity of light in an optical modulator or the intensity of a modulation signal and for controlling the operating point of the optical modulator based on the result of detection. In the optical c
6996142 Light source device and wavelength control device therefor February 7, 2006
Disclosed herein is a light source device and a wavelength control device therefor. The light source device includes a plurality of laser diodes, a temperature sensor provided in the vicinity of the plurality of laser diodes, a control loop for controlling the temperatures of the plurali
6947630 Control method and control apparatus for variable wavelength optical filter September 20, 2005
The present invention has an object to provide a control method and a control apparatus for a variable wavelength optical filter, which can reliably and stably control drive conditions of the variable wavelength optical filter, independent of the number of wavelengths to be selectively
6934433 Control method and control apparatus of optical device August 23, 2005
The present invention aims at providing a control method and a control apparatus for controlling the operation setting of an optical device with high accuracy, so as to reliably obtain characteristics according to a desired relationship to be set corresponding to a signal light, imme
6930824 Optical amplifier which compensates for dispersion of a WDM optical signal August 16, 2005
The invention provides an optical wavelength multiplex transmission method wherein a band in the proximity of a zero dispersion wavelength of an optical fiber is used and optical signals are disposed at efficient channel spacings taking an influence of the band, the wavelength disper
6925214 Connecting method of optical function devices, and optical apparatus August 2, 2005
The present invention aims at providing a connecting method capable of suppressing an influence of stray light for a plurality of optical function devices formed on the same substrate, and an optical apparatus applied with the control method. To this end, in the connecting method of
6917732 Connecting method of optical function devices, and optical apparatus July 12, 2005
The present invention aims at providing a connecting method capable of suppressing an influence of stray light for a plurality of optical function devices formed on the same substrate, and an optical apparatus applied with the control method. To this end, in the connecting method of
6895141 Control method and device for optical filter, and optical node device May 17, 2005
In the control method for the optical filter according to the present invention, WDM signal light obtained by wavelength division multiplexing a plurality of optical signals having different wavelengths is supplied to an optical filter to obtain output WDM signal light including a part o
6870972 Connecting method of optical devices, and optical apparatus March 22, 2005
The present invention aims at providing a connecting method of optical devices capable of suppressing a periodic wavelength dependence loss and the like, due to the inter-polarization-mode interference caused when connecting a plurality of optical devices by using an optical path having
6785306 Wavelength-tunable stabilizer laser August 31, 2004
A wavelength-tunable stabilized laser is provided with a light source comprising a plurality of lasers capable of oscillating at a plurality of wavelengths, a light detecting part for detecting the light intensity of laser light output from the light source via a periodic filter, and a
6783282 Optical wavelength filter August 31, 2004
The present invention aims at providing an optical wavelength filter of band rejection type capable of reliably and stably blocking a light of a desired wavelength from passing through. To this end, the optical wavelength filter of the present invention comprises a plurality of optic
6782017 Wavelength locker and wavelength discriminating apparatus August 24, 2004
An object of the invention is to provide a wavelength locker which has a wider locking range than that of the wavelength locker in the prior art and which can cope with a plurality of wavelengths. The aforementioned objects are achieved by a wavelength locker, which comprises a periodic
6594069 Control method and control apparatus of optical wavelength variable filter July 15, 2003
The present invention aims at providing a control method and a control apparatus for controlling variable selected wavelengths at respective stages with high accuracy and reliability, to obtain desired wavelength characteristics, in a multi-staged band rejection type optical wavelength
6583900 Optical transmission apparatus, optical transmission system, and optical terminal station June 24, 2003
In an OADM system, an OADM device includes an AOTF. The AOTF can select an optional wavelength by changing the frequency of an RF signal to be applied. An optical signal having a specified wavelength can be dropped from a wavelength-multiplexed optical signal input from an input terminal
6545784 Optical cross connect unit, optical add-drop multiplexer, light source unit, and adding unit April 8, 2003
M wavelength separating sections receive multiplexed optical signals each having N kinds of wavelengths different. Each of the multiplexed optical signals are separated into N optical signals. M relays conduct optical reproduction and relay to convert each of the N optical signals into
6417945 Optical wavelength multiplex transmission method and optical dispersion compensation method July 9, 2002
An optical transmission system in which a wavelength-division-multplexed (WDM) optical signal including a plurality of optical signals having different wavelengths is demultiplexed into first optical signals and second optical signals. The second optical signals have wavelengths longer
6384943 Optical wavelength multiplex transmission method and optical dispersion compensation method May 7, 2002
An optical transmission system in which a wavelength-division-multiplexed (WDM) optical signal including a plurality of optical signals having different wavelengths is demultiplexed into first optical signals and second optical signals. The second optical signals have wavelengths longer
6366376 Optical transmitting device using wavelength division multiplexing to transmit signal lights hav April 2, 2002
An optical transmitting device which combines a plurality of signal lights, each having a different, corresponding, frequency, into a wavelength division multiplexed signal light. The frequencies are spaced apart from each other in a manner with eliminates the effects of four-wave mixing
6351323 Optical transmission apparatus, optical transmission system, and optical terminal station February 26, 2002
In an OADM system, an OADM device includes an AOTF. The AOTF can select an optional wavelength by changing the frequency of an RF signal to be applied. An optical signal having a specified wavelength can be dropped from a wavelength-multiplexed optical signal input from an input terminal
6285479 Optical cross connect unit, optical add-drop multiplexer, light source unit, and adding unit September 4, 2001
The present invention relates to an optical cross connect unit comprising M wavelength separating sections for receiving multiplexed optical signals each having N kinds of wavelengths different from each other through M optical fibers, respectively, and for wavelength-separating each of
6252688 Optical wavelength multiplex transmission method and optical dispersion compensation method June 26, 2001
The invention provides an optical wavelength multiplex transmission method wherein a band in the proximity of a zero dispersion wavelength of an optical fiber is used and optical signals are disposed at efficient channel spacings taking an influence of the band, the wavelength disper
6252687 Optical wavelength multiplex transmission method and optical dispersion compensation method June 26, 2001
The invention provides an optical wavelength multiplex transmission method wherein a band in the proximity of a zero dispersion wavelength of an optical fiber is used and optical signals are disposed at efficient channel spacings taking an influence of the band, the wavelength disper
6243176 Optical wavelength multiplex transmission method and optical dispersion compensation method June 5, 2001
The invention provides an optical wavelength multiplex transmission method wherein a band in the proximity of a zero dispersion wavelength of an optical fiber is used and optical signals are disposed at efficient channel spacings taking an influence of the band, the wavelength disper
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