LexDanaLexDanabeta
Inventor

Takeshi Hoshida

Inventor
Kawasaki, JP

Overview

171→
Patents
2003–2021
Patent span
Electricity
Primary field (CPC H)

Patents· 171 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

H04Bprimary
H04BTransmission49%
H04JMultiplex communication20%
H04LTransmission of digital information, e.g. telegraphic communication11%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein6%
H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light4%
H04QSelecting4%
G02BOptical elements, systems or apparatus3%
G01MTesting static or dynamic balance of machines or structures1%
H03FAmplifiers1%
H03JTuning resonant circuits1%
PatentTitleYear
10,999,659Optical network device and method for monitoring transmission line202110,955,727Wavelength converter and transmission apparatus202110,948,802Wavelength converter apparatus and method of performing wavelength conversion202110,873,410Reception device and method of detecting supervisory control signal202010,862,592Optical receiver, optical transmission system, and reception processing method202010,853,719Data collecting device and optical transmission system202010,797,799Optical transmission apparatus, optical transmission system, and optical transmission method202010,749,604Optical phase distortion compensating device and method of compensating optical phase distortion202010,720,992Transmission apparatus, reception apparatus, and method for estimating characteristics of transmission line202010,567,077Imbalance compensation device, transmission device, and imbalance compensation method202010,554,325Receiver and receiving method202010,498,459Optical transmitter and skew compensation method201910,439,732Receiving device and phase-error compensation method201910,429,721Wavelength conversion device, control-light generation device, wavelength conversion method, and control-light generation method201910,425,166Optical transmitter, optical transmission apparatus, and optical modulation method201910,419,117Monitor device and monitor method for monitoring transmission line201910,419,263Transmission system and method201910,396,900Communication apparatus and method of controlling transmission signal201910,374,703Transmission device and signal monitoring method201910,348,407Receiving device and receiving method201910,341,027Optical transmitter and control method for optical transmitter201910,313,017Optical transmitter, optical receiver and optical transmission method201910,281,798Wavelength conversion device, control-light generation device, wavelength conversion method, and control-light generation method201910,277,328Signal processing device used in optical receiver and signal processing method201910,277,313Transmission apparatus, transmission system, and transmission control method201910,256,903Network controller and signal quality estimating method201910,219,049Optical reception apparatus, optical transmission apparatus, optical communication system, and skew adjusting method201910,193,621Location measurement apparatus, light modulation converter, and light variation location measurement method201910,090,961Multi-channel optical cross-phase modulation compensator201810,090,927Digital signal processing circuit and signal processing device that includes a plurality of digital signal processing circuits201810,057,012Error correction circuit and optical transmission system201810,050,738Low noise colorless, directionless, contentionless reconfigurable optical add/drop multiplexer20189,906,296'Network controller and signal quality estimating method'20189,887,798'Transmission apparatus, reception apparatus and modulation method'20189,882,642'Optical remodulator that remodulates modulated optical signal and optical remodulation method'20189,871,596'Optical receiver and signal processing method'20189,857,662'Optical frequency shift device and method'20189,853,739Optical transmitter and method for controlling bias of optical modulator20179,825,699'Method and apparatus for correcting inter-channel power imbalance and receiver'20179,686,020'Signal processing device and signal processing method'20179,667,347'Optical transmitter, optical receiver, method of compensating non-linear distortion, and communication apparatus'20179,654,224'Optical transmission device, nonlinear distortion compensation method, and nonlinear distortion pre-equalization method'20179,564,975'Optical transmission device, method of optical transmission, and non-transitory computer-readable medium'20179,559,771'Optical transmission device, node device, optical transmission method, and optical transmission system'20179,553,674'Optical transmitter and method of optical transmission'20179,515,763'Digital coherent receiver and receiving method of optical signal'20169,503,211'Signal detection circuit and optical transmission equipment'20169,467,228'Optical transmission system and optical transmission method'20169,444,554'Digital coherent receiving apparatus'20169,419,720'Optical signal transmitter'20169,356,689'Optical transmitter and optical signal transmission method'20169,281,937'Control timing synchronization method, optical transmission system, and optical transmission apparatus'20169,281,913'Signal detection circuit and optical transmission equipment'20169,240,838'Optical transmitter and method for controlling bias for optical modulator'20169,225,459'Optical transmission system, optical transmission apparatus, signal conditioning program, and signal conditioning method'20159,219,622'Method and apparatus for compensating nonlinear damage'20159,185,474'Wavelength path switching method, optical communication system, optical communication device, optical repeater, and network management device'20159,154,233'Frequency modulation signal demodulator and light receiving apparatus'20159,143,260'Optical transmission system, method of adjusting optical transmission device, and non-transitory computer-readable medium'20159,130,680'Optical transmitter and modulated optical signal generating method'20159,100,137'Crosstalk reduction in optical networks using variable subcarrier spectral allocation'20159,094,121'Optical transmission apparatus'20159,083,459'Optical transmission system, method of testing optical transmission system, and non-transitory computer-readable medium'20159,071,378'Superimposed signal detection circuit and optical node equipment'20159,054,814'Front end device and superposing signal detecting device'20159,031,403'Optical transmission system and method for monitoring polarization dependent characteristics of optical transmission line'20159,014,575'Sampling clock synchronizing apparatus, digital coherent receiving apparatus, and sampling clock synchronizing method'20158,989,572'Optical path establishing method and optical node apparatus'20158,965,221'Receiver and cross phase modulation reduction method'20158,947,767'Excitation light source for raman amplification, raman amplifier, and optical transmission system'20158,942,569'Optical transmission/reception system, optical transmitter, optical receiver, and optical transmission/reception method'20158,942,574'Light receiving device and light receiving method'20158,935,115'Method and apparatus for compensating nonlinear damage'20158,886,057'Optical receiver, signal processor, and optical receiving method'20148,886,056'Apparatus for self-phase modulation noise calculation, apparatus for self-phase modulation noise elimination and optical coherent receiver'20148,879,925'Optical transmitter and optical transmission method'20148,867,927'Optical transmitting apparatus, optical receiving apparatus, and optical communication system comprising them'20148,861,557'Wavelength-tunable light source and wavelength variation method'20148,849,128'Multi-wavelength light source'20148,818,207'Optical transmitter'20148,805,207'Distortion compensator, optical receiver, distortion compensator and optical receiver controlling methods, and optical transmission system'20148,773,755'Optical amplifier and multicore fiber'20148,768,173'Optical receiver and optical transmission system'20148,744,278'Method for electric power supply of optical receiver, digital signal processing circuit, and optical receiver'20148,744,276'Optical receiving apparatus and digital receiving circuit'20148,731,411'Polarization fluctuation compensation device and optical communication system'20148,705,981'Driver circuit of optical modulator'20148,693,891'Optical modulation apparatus and optical modulation method'20148,660,438'Digital coherent receiver and receiving method'20148,649,678'Frame processing apparatus, optical receiving apparatus, optical transceiving apparatus, optical transmission system, and frame processing controlling method'20148,649,689'Digital coherent receiving apparatus'20148,649,685'Light receiving device and light receiving method'20148,630,552'Digital coherent receiver and receiving method'20148,625,996'Optical transmitter, optical transmission method, and wavelength-selective variable delayer'20148,594,508'Optical transmission system'20138,565,615'Optical modulation apparatus and optical modulation method'20138,526,828'Optical transmitter and optical transmitter unit'20138,515,277'Nonlinear distortion detecting circuit, optical receiver, optical transmission system, and method for detecting nonlinear distortion'20138,509,628'Differential multilevel modulated optical signal receiver apparatus'20138,488,975'Optical transmitter, optical transmitter and receiver system, optical transmitting method and optical transmitting and receiving method'20138,447,190'Distortion compensating apparatus, optical receiving apparatus, and optical transmitting and receiving system'20138,447,186'Distortion compensator, optical receiver, distortion compensator and optical receiver controlling methods, and optical transmission system'20138,437,633'Optical network and control method therefor'20138,406,638'Coherent light receiving system'20138,406,635'Optical communication system and optical receiver'20138,400,702'Optical modulation device and optical modulation method'20138,391,725'Optical receiver for controlling wavelength of local oscillation light and local oscillation light control method'20138,380,084'Polarization multiplexing and transmitting apparatus'20138,374,512'Frequency offset monitoring device and optical coherent receiver'20138,351,795'Optical transmission system and optical transmission method'20138,351,797'Repeater and repeating method'20138,331,805'Digital coherent optical receiver'20128,249,464'Optical receiver and method for optical reception'20128,249,466'Polarization multiplexing optical receiver and polarization multiplexing optical transmission system'20128,244,138'Polarization-multiplexing optical transmitter polarization-multiplexing optical receiver, polarization-multiplexing optical transceiving system, and controlling method thereof'20128,145,069'Optical transmitter'20128,116,635'Polarization multiplexing and transmitting apparatus'20128,086,113'Optical receiver'20118,014,685'Coherent optical receiver'20117,983,564'Transmission system and transmission method'20117,957,654'Coherent optical receiver'20117,907,324'Optical modulator and controlling method and apparatus thereof'20117,869,715'Dispersion compensating apparatus and dispersion compensation control method'20117,869,719'Method and system for automatic feedback control for fine tuning a delay interferometer'20117,860,408'Interferometer for demodulating differential M-phase shift keying signal'20107,860,394'Optical receiver and optical reception method compatible with differential quadrature phase shift keying'20107,848,659'Optical transmitting apparatus and optical communication system'20107,817,923'Optical transmitting apparatus, optical receiving apparatus, and optical communication system comprising them'20107,792,436'Optical receiver corresponding to differential M-phase shift keying system'20107,773,283'Optical modulation device and optical modulation method'20107,751,721'Optical DQPSK receiver apparatus'20107,720,392'Differential quadrature phase-shift modulator and method for setting driving voltage thereof'20107,706,695'Optical DQPSK receiver apparatus'20107,689,133'Optical signal reception device and method of controlling optical signal reception'20107,684,713'Phase control apparatus and optical DQPSK receiver'20107,680,419'Repeater and repeating method'20107,631,378'Optical waveform shaper'20097,630,650'Multi-level modulation receiving device'20097,620,321'Optical transmitting apparatus, method of increasing the number of paths of the apparatus, and optical switch module for increasing the number of paths of the apparatus'20097,613,403'Differential multilevel modulated optical signal receiver apparatus'20097,606,504'Optical receiver and optical receiving method corresponding to differential M-phase shift keying system'20097,603,045'Method and system for automatic feedback control for fine tuning a delay interferometer'20097,602,322'Analog-to-digital conversion controller, optical receiving device, optical receiving method, and waveform-distortion compensating device'20097,603,007'Quadrature phase-shift keying modulator and phase shift amount controlling method for the same'20097,596,315'Wavelength division multiplexing optical transmission system and transmission wavelength control method therefor'20097,593,646'Upgraded optical communication system with increased transmission capacity and method'20097,583,895'Polarization scrambler, optical add/drop multiplexer, optical route switching apparatus and wavelength division multiplexing optical transmission system'20097,555,061'Optical communication device'20097,529,490'Optical receiver and optical reception method compatible with differential quadrature phase shift keying'20097,515,834'Upgraded optical communication system with increased transmission capacity and method'20097,505,414'Network designing device and computer-readable medium'20097,483,639'Method and system for transmitting information in an optical communication system using distributed amplification'20097,477,848'Optical receiving apparatus and method for controlling the optical receiving apparatus'20097,415,182'Optical fiber cable'20087,382,979'Wavelength dispersion compensation design method and a system thereof'20087,254,342'Method and system for transmitting information in an optical communication system with low signal distortion'20077,254,325'Method and system for optical performance monitoring'20077,233,742'Optical communication system, method for supplying pump light, and distributed Raman amplifying apparatus'20077,200,344'Receiver and method for a multichannel optical communication system'20077,197,251'Optical phase modulation'20077,110,680'Method and system for forward pumping Raman amplification in an optical network'20067,099,541'Optical fiber cable'20067,035,543'Method and system for demultiplexing non-intensity modulated wavelength division multiplexed (WDM) signals'20066,990,296'Optical phase modulation'20066,959,128'Coupler-based optical cross-connect having a regeneration module'20056,934,454'Distributed optical amplifying apparatus, optical communication station, optical communication system, and optical fiber cable'20056,885,499'Optical amplifying apparatus for amplifying wide-wavelength-band light, optical sending apparatus, optical transmission system, and optical amplifying method'20056,862,134'Distributed optical amplifier, amplifying method, and optical communication system'20056,775,424'Modulation and filtration of optical signals'20046,721,481'Distributed optical fiber amplifier using fiber with specific characteristic values'20046,512,628'Distributed optical amplifier, amplifying method, and optical communication system'2003

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2003–2021Patents assigned to FUJITSU LTD (168)· patent assignee history
2003–2011Based in Richardson, TX, US· patent location history
2005–2009Based in Tokyo, JP· patent location history
2008–2021Based in Kawasaki, JP· patent location history
2011–2015Patents assigned to HOSHIDA TAKESHI (48)· patent assignee history
2011–2015Patents assigned to NAKASHIMA HISAO (23)· patent assignee history
2011–2015Patents assigned to TANIMURA TAKAHITO (17)· patent assignee history
2012–2014Patents assigned to ODA SHOICHIRO (12)· patent assignee history
2013Based in Kanagawa, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
FUJITSU LTD1682003–2021
HOSHIDA TAKESHIself482011–2015
NAKASHIMA HISAO232011–2015
TANIMURA TAKAHITO172011–2015
ODA SHOICHIRO122012–2014
Locations
LocationPatentsSpan
Kawasaki, JP1482008–2021
Richardson, Texas, US172003–2011
Tokyo, JP52005–2009
Kanagawa, JP12013