Inventor · disambiguated record
Takaaki Ogata
Also filed as: OGATA TAKAAKI
28 granted patents·3 pending applications·292 citations·filing 1994–2021
96Inventor score
Top patents by PatentIndex Score
31 records- 0197US11467061B2Estimating mode field distribution in optical fibers from guided acoustic wave brillouin scatteringNEC LAB AMERICA INC·Filed 2021·Granted Oct 11, 2022·4 cites·8 claims
- 0287US9130679B1Polarization-switched differential ternary phase-shift keyingIP EZRA·Filed 2012·Granted Sep 8, 2015·13 cites·8 claims
- 0382US5781332AVariable wavelength optical filterNEC CORP·Filed 1996·Granted Jul 14, 1998·59 cites·1 claims
- 0478US9819530B2Constellation designs with non-gray bit mappingNEC LAB AMERICA INC·Filed 2016·Granted Nov 14, 2017·3 cites·9 claims
- 0576US7123405B2Optical amplifying and relaying systemNEC CORP·Filed 2004·Granted Oct 17, 2006·13 cites·15 claims
- 0674US6043922AOptical receiver board, optical wavelength-tuning filter module used for optical receiver board, and actuator for optical wavelength-tuning filter moduleNEC CORP·Filed 1997·Granted Mar 28, 2000·52 cites·20 claims
- 0767US8873953B2Multiple-symbol polarization switching for differential-detection modulation formatsZHANG SHAOLIANG·Filed 2012·Granted Oct 28, 2014·3 cites·6 claims
- 0866US6868204B2Optical amplifying and relaying systemNEC CORP·Filed 2002·Granted Mar 15, 2005·7 cites·42 claims
- 0963US6539153B2Light limiterNEC CORP·Filed 2001·Granted Mar 25, 2003·7 cites·5 claims
- 1063US6064514AOptical surge preventing method and system for use with or in a rare earth doped fiber circuitNEC CORP·Filed 1996·Granted May 16, 2000·25 cites·54 claims
- 1161US5739934AWavelength division multiplexing lightwave transmission systemNEC CORP·Filed 1996·Granted Apr 14, 1998·25 cites·7 claims
- 1259US9337923B2Optical spectral shaping for nonlinearity enhancement in high speed digital coherent optical transmissionsNEC LAB AMERICA INC·Filed 2012·Granted May 10, 2016·1 cites·14 claims
- 1357US10401564B2Fiber nonlinearity mitigation using strong mode coupling and large modal delayNEC LAB AMERICA INC·Filed 2018·Granted Sep 3, 2019·0 cites·2 claims
- 1454US6218658B1Optical fuseNEC CORP·Filed 1999·Granted Apr 17, 2001·21 cites·20 claims
- 1553US12395244B2Optical fiber exhibiting low guided acoustic Brillouin scattering (GAWBS) noise and measurement thereofNEC LAB AMERICA INC·Filed 2021·Granted Aug 19, 2025·0 cites·12 claims
- 1653US5956166AWavelength division multiplexing optical transmission system and wavelength division multiplexing optical transmission methodNEC CORP·Filed 1996·Granted Sep 21, 1999·18 cites·13 claims
- 1753US2020403383A1Semiconductor amplifier with low polariation-dependent gainNEC LAB AMERICA INC·Filed 2020·Application pending·0 cites
- 1852US10581216B23D waveguide for efficient coupling of multimode pump and signals to a multicore fiber amplifierNEC LAB AMERICA INC·Filed 2017·Granted Mar 3, 2020·0 cites·17 claims
- 1949US6845192B2Optical amplifying and relaying systemNEC CORP·Filed 2004·Granted Jan 18, 2005·1 cites·11 claims
- 2048US12034482B2Accurate measurement for guided acoustic-wave Brillouin scatteringNEC LAB AMERICA INC·Filed 2021·Granted Jul 9, 2024·0 cites·8 claims
- 2148US9077484B2Generation of polarization-alternated QPSK formatNEC LAB AMERICA INC·Filed 2013·Granted Jul 7, 2015·0 cites·7 claims
- 2248US5442476AOptical communication methodNEC CORP·Filed 1994·Granted Aug 15, 1995·16 cites·2 claims
- 2347US9203519B2Pair-wise symbol correlated high receiver sensitivity modulation formatNEC LAB AMERICA INC·Filed 2013·Granted Dec 1, 2015·0 cites·16 claims
- 2447US6134372ALight intensity attenuator and attenuating methodSUMITOMO OSAKA CEMENT CO LTD·Filed 1998·Granted Oct 17, 2000·15 cites·14 claims
- 2545US8917998B2Polarization switching for optical fiber communicationsNEC LAB AMERICA INC·Filed 2012·Granted Dec 23, 2014·0 cites·20 claims
- 2642US6233385B1Light limiterNEC CORP·Filed 1999·Granted May 15, 2001·9 cites·8 claims
- 2741US9337868B2Iterative decoding for cascaded LDPC and TCM codingNEC LAB AMERICA INC·Filed 2014·Granted May 10, 2016·0 cites·10 claims
- 2839US9722700B2Wavelength division multiplexing system and method including wavelength monitoringNEC LAB AMERICA INC·Filed 2015·Granted Aug 1, 2017·0 cites·17 claims
- 2939US8787709B2Polarization-alternating optical signal generation using CSRZ modulationYAMAN FATIH·Filed 2012·Granted Jul 22, 2014·0 cites·12 claims
- 3034US2017353247A1Constellation design for use in communication systemsNEC LAB AMERICA INC·Filed 2016·Application pending·0 cites
- 3134US2012321311A1Coherent Interleaved Polarization-Multiplexing Optical Communications with Single IQ ModulatorZHANG SHAOLIANG·Filed 2012·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →