| Patent Number |
Title Of Patent |
Date Issued |
| 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 |
| 6067187 |
Optical amplifier and optical communication system employing the same |
May 23, 2000 |
| An optical amplifier has an optical amplifying medium, a pump light source outputting pump light, and a first optical coupler for supplying the pump light to the optical amplifying medium. A probe light source outputs probe light having a wavelength included in an amplification band, a s |
