Inventor · disambiguated record
Motoyoshi Sekiya
Also filed as: SEKIYA MOTOYOSHI
113 granted patents·11 pending applications·1,706 citations·filing 1995–2021
99Inventor score
Top patents by PatentIndex Score
124 records- 0199US9485554B1Methods and systems for using modulation frequencies for optical channel monitoring with periodic optical filteringFUJITSU LTD·Filed 2015·Granted Nov 1, 2016·60 cites·20 claims
- 0298US9197320B2System and method for monitoring polarization-dependent lossFUJITSU LTD·Filed 2013·Granted Nov 24, 2015·48 cites·28 claims
- 0398US9112609B2Mitigation of polarization dependent loss in optical multi-carrier/super-channel transmissionFUJITSU LTD·Filed 2013·Granted Aug 18, 2015·56 cites·18 claims
- 0496US9485019B1Methods and systems for optical channel monitoring with periodic optical filtering of dual polarization signalsFUJITSU LTD·Filed 2015·Granted Nov 1, 2016·20 cites·18 claims
- 0595US6417945B2Optical wavelength multiplex transmission method and optical dispersion compensation methodFUJITSU LTD·Filed 2001·Granted Jul 9, 2002·30 cites·100 claims
- 0695US5696614AOptical wavelength multiplex transmission method and optical dispersion compensation methodFUJITSU LTD·Filed 1997·Granted Dec 9, 1997·85 cites·3 claims
- 0793US9837788B2Optical phase-sensitive amplifier with raman amplifier intermediate stageFUJITSU LTD·Filed 2015·Granted Dec 5, 2017·11 cites·20 claims
- 0893US6654561B1Method and apparatus for measuring optical signal-to-noise ratio, and pre-emphasis method and optical communication system each utilizing the methodFUJITSU LTD·Filed 2000·Granted Nov 25, 2003·60 cites·36 claims
- 0992US9246624B1Low noise optical phase-sensitive amplifier for dual-polarization modulation formatsFUJITSU LTD·Filed 2014·Granted Jan 26, 2016·9 cites·33 claims
- 1090US5815294AOptical transmission system with transmission characteristic measuring deviceFUJITSU LTD·Filed 1997·Granted Sep 29, 1998·71 cites·7 claims
- 1190US5602666AOptical dispersion compensation method for shifting a zero dispersion wavelength of an optical fiber to compensate for dispersion in an optical systemFUJITSU LTD·Filed 1995·Granted Feb 11, 1997·56 cites·19 claims
- 1288US5636046AOptical dispersion compensation method using transmissible band determined from synergetic effect of self phase modulation and group velocity dispersionFUJITSU LTD·Filed 1995·Granted Jun 3, 1997·48 cites·12 claims
- 1386US9344194B2System and method for monitoring and control of an optical modulator for an M-QAM transmitterFUJITSU LTD·Filed 2013·Granted May 17, 2016·8 cites·10 claims
- 1486US6570703B2Optical amplifying apparatus, optical amplifying method, and optical communication systemFUJITSU LTD·Filed 2001·Granted May 27, 2003·25 cites·12 claims
- 1586US6384943B2Optical wavelength multiplex transmission method and optical dispersion compensation methodFUJITSU LTD·Filed 2001·Granted May 7, 2002·13 cites·44 claims
- 1685US9699074B2Efficient utilization of transceivers for shared restoration in flexible grid optical networksFUJITSU LTD·Filed 2015·Granted Jul 4, 2017·6 cites·16 claims
- 1784US5896217AOptical transmission system, optical multiplexing transmission system, and related peripheral techniquesFUJITSU LTD·Filed 1997·Granted Apr 20, 1999·46 cites·11 claims
- 1883US8761600B2In-band supervisory data modulationKIM INWOONG·Filed 2012·Granted Jun 24, 2014·6 cites·20 claims
- 1983US6839162B2Optical amplifying apparatus and optical communication systemFUJITSU LTD·Filed 2001·Granted Jan 4, 2005·25 cites·21 claims
- 2083US6411429B1Optical amplifying apparatus, wide-band optical amplifying apparatus, and optical communication systemFUJITSU LTD·Filed 2000·Granted Jun 25, 2002·28 cites·48 claims
- 2183US6243176B1Optical wavelength multiplex transmission method and optical dispersion compensation methodFUJITSU LTD·Filed 1997·Granted Jun 5, 2001·34 cites·116 claims
- 2283US5991477AOptical transmission system, optical multiplexing transmission system, and related peripheral techniquesFUJITSU LTD·Filed 1998·Granted Nov 23, 1999·80 cites·11 claims
- 2383US5754322AOptical transmission system, optical multiplexing transmission system, and related peripheral techniquesFUJITSU LTD·Filed 1997·Granted May 19, 1998·43 cites·18 claims
- 2482US9100137B2Crosstalk reduction in optical networks using variable subcarrier spectral allocationFUJITSU LTD·Filed 2013·Granted Aug 4, 2015·5 cites·18 claims
- 2582US9042739B2Network management system, repeater, and repeating methodSEKIYA MOTOYOSHI·Filed 2010·Granted May 26, 2015·5 cites·13 claims
- 2682US7031049B2Loss point detecting method and distributed raman amplifier applying the sameFUJITSU LTD·Filed 2003·Granted Apr 18, 2006·19 cites·12 claims
- 2781US8983290B2System and method for monitoring a dual-polarization signal using an in-band supervisory signalFUJITSU LTD·Filed 2013·Granted Mar 17, 2015·5 cites·24 claims
- 2881US6501774B2Optical transmission apparatus for multiple wavelengths and optical transmission wavelength control methodFUJITSU LTD·Filed 2001·Granted Dec 31, 2002·18 cites·12 claims
- 2981US6483625B2WDM optical transmission apparatusFUJITSU LTD·Filed 2001·Granted Nov 19, 2002·25 cites·13 claims
- 3081US5909297ADrift compensating circuit for optical modulators in an optical systemFUJITSU LTD·Filed 1997·Granted Jun 1, 1999·70 cites·14 claims
- 3181US5900959AOptical transmitter, optical communication system and optical communication methodFUJITSU LTD·Filed 1996·Granted May 4, 1999·70 cites·12 claims
- 3280US9614638B2Methods and systems for periodic optical filtering to identify tone modulated optical signalsFUJITSU LTD·Filed 2015·Granted Apr 4, 2017·4 cites·14 claims
- 3380US9444550B2Flexible virtual optical network provisioning using distance-adaptive modulationFUJITSU LTD·Filed 2014·Granted Sep 13, 2016·5 cites·14 claims
- 3480US6229833B1Laser diode protecting circuit and laser driving current control circuitFUJITSU LTD·Filed 1999·Granted May 8, 2001·53 cites·10 claims
- 3580US5612807AOptical dispersion compensation method for shifting a zero dispersion wavelength of an optical fiber to compensate for dispersion in an optical systemFUJITSU LTD·Filed 1995·Granted Mar 18, 1997·31 cites·19 claims
- 3679US9312914B2Crosstalk reduction in optical networks using variable subcarrier power levelsFUJITSU LTD·Filed 2013·Granted Apr 12, 2016·4 cites·21 claims
- 3779US6590686B1Optical transmitterFUJITSU LTD·Filed 1999·Granted Jul 8, 2003·66 cites·14 claims
- 3878US9712249B2Methods and systems for superchannel subcarrier monitoring using amplitude modulated tonesFUJITSU LTD·Filed 2015·Granted Jul 18, 2017·3 cites·20 claims
- 3978US9614751B2Optical path computation based on a reachability matrixFUJITSU LTD·Filed 2014·Granted Apr 4, 2017·4 cites·20 claims
- 4077US9912435B2Nonlinear penalty estimation using spectral inversion in optical transport networksFUJITSU LTD·Filed 2016·Granted Mar 6, 2018·3 cites·12 claims
- 4177US9768878B2Methods and systems for superchannel power pre-emphasisFUJITSU LTD·Filed 2015·Granted Sep 19, 2017·3 cites·20 claims
- 4277US8644704B2Method and system for an adaptive channel grid of an optical networkVASSILIEVA OLGA I·Filed 2011·Granted Feb 4, 2014·4 cites·24 claims
- 4377US7542677B2Dispersion compensation method in optical communication system having optical add drop multiplexing capabilityFUJITSU LTD·Filed 2007·Granted Jun 2, 2009·6 cites·9 claims
- 4477US7359645B2Dispersion compensating method, optical transmission system, and optical transmission apparatusFUJITSU LTD·Filed 2004·Granted Apr 15, 2008·17 cites·16 claims
- 4577US6844961B2Method and apparatus for controlling Raman amplification using excitation light pulses of different wavelengthsFUJITSU LTD·Filed 2002·Granted Jan 18, 2005·15 cites·19 claims
- 4677US5596448ADispersion compensator and optical amplifierFUJITSU LTD·Filed 1995·Granted Jan 21, 1997·45 cites·13 claims
- 4776US9838253B2Object-oriented network virtualizationFUJITSU LTD·Filed 2014·Granted Dec 5, 2017·4 cites·20 claims
- 4875US7133610B1Optical sender, terminal device, and optical communication system each having the optical senderFUJITSU LTD·Filed 1998·Granted Nov 7, 2006·54 cites·42 claims
- 4975US5870213AOptical transmission system, optical multiplexing transmission system, and related peripheral techniquesFUJITSU LTD·Filed 1998·Granted Feb 9, 1999·51 cites·16 claims
- 5074US9344190B2Flexible placement of spectral inverters in optical networksKIM INWOONG·Filed 2014·Granted May 17, 2016·3 cites·17 claims
Showing the top 50 of 124 patent records by PatentIndex Score.
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