Inventor · disambiguated record
Hiroki Ooi
Also filed as: OOI HIROKI
82 granted patents·4 pending applications·1,755 citations·filing 1996–2015
99Inventor score
Top patents by PatentIndex Score
86 records- 0197US7817923B2Optical transmitting apparatus, optical receiving apparatus, and optical communication system comprising themFUJITSU LTD·Filed 2005·Granted Oct 19, 2010·55 cites·37 claims
- 0296US6362913B2Optical modulation apparatus and method of controlling optical modulatorFUJITSU LTD·Filed 2001·Granted Mar 26, 2002·97 cites·16 claims
- 0395US7620321B2Optical transmitting apparatus, method of increasing the number of paths of the apparatus, and optical switch module for increasing the number of paths of the apparatusFUJITSU LTD·Filed 2005·Granted Nov 17, 2009·26 cites·8 claims
- 0495US6081360AMethod and apparatus for optimizing dispersion in an optical fiber transmission line in accordance with an optical signal power levelFUJITSU LTD·Filed 1998·Granted Jun 27, 2000·147 cites·4 claims
- 0593US7477848B2Optical receiving apparatus and method for controlling the optical receiving apparatusFUJITSU LTD·Filed 2005·Granted Jan 13, 2009·26 cites·10 claims
- 0691US8867927B2Optical transmitting apparatus, optical receiving apparatus, and optical communication system comprising themAKIYAMA YUICHI·Filed 2010·Granted Oct 21, 2014·7 cites·12 claims
- 0791US7848659B2Optical transmitting apparatus and optical communication systemFUJITSU LTD·Filed 2005·Granted Dec 7, 2010·22 cites·19 claims
- 0891US7792428B2Optical add/drop multiplexerFUJITSU LTD·Filed 2005·Granted Sep 7, 2010·12 cites·13 claims
- 0990US5926297AOptical modulating device and optical modulating methodFUJITSU LTD·Filed 1997·Granted Jul 20, 1999·99 cites·31 claims
- 1090US5815294AOptical transmission system with transmission characteristic measuring deviceFUJITSU LTD·Filed 1997·Granted Sep 29, 1998·71 cites·7 claims
- 1189US7853148B2Optical add/drop multiplexerFUJITSU LTD·Filed 2009·Granted Dec 14, 2010·10 cites·19 claims
- 1288US6661974B1Optical transmitter and optical transmission systemFUJITSU LTD·Filed 1999·Granted Dec 9, 2003·102 cites·26 claims
- 1386US6925262B2Method and system for compensating chromatic dispersionFUJITSU LTD·Filed 2001·Granted Aug 2, 2005·32 cites·21 claims
- 1486US5805321AControl unit for optical modulators producing multiplexed optical output signalFUJITSU LTD·Filed 1996·Granted Sep 8, 1998·83 cites·11 claims
- 1585US8131152B2Optical add/drop multiplexerAKIYAMA YUICHI·Filed 2010·Granted Mar 6, 2012·5 cites·19 claims
- 1685US7603007B2Quadrature phase-shift keying modulator and phase shift amount controlling method for the sameFUJITSU LTD·Filed 2008·Granted Oct 13, 2009·11 cites·10 claims
- 1784US7933519B2Optical cross-connect using wavelength selective switchesFUJITSU LTD·Filed 2007·Granted Apr 26, 2011·9 cites·4 claims
- 1884US7925171B2Optical transmission apparatusFUJITSU LTD·Filed 2006·Granted Apr 12, 2011·11 cites·18 claims
- 1984US5896217AOptical transmission system, optical multiplexing transmission system, and related peripheral techniquesFUJITSU LTD·Filed 1997·Granted Apr 20, 1999·46 cites·11 claims
- 2083US5991477AOptical transmission system, optical multiplexing transmission system, and related peripheral techniquesFUJITSU LTD·Filed 1998·Granted Nov 23, 1999·80 cites·11 claims
- 2183US5754322AOptical transmission system, optical multiplexing transmission system, and related peripheral techniquesFUJITSU LTD·Filed 1997·Granted May 19, 1998·43 cites·18 claims
- 2282US6278539B1Optical modulation apparatus and method of controllingFUJITSU LTD·Filed 1999·Granted Aug 21, 2001·58 cites·25 claims
- 2381US7711270B2Optical node and optical add/drop multiplexerFUJITSU LTD·Filed 2005·Granted May 4, 2010·8 cites·11 claims
- 2481US5909297ADrift compensating circuit for optical modulators in an optical systemFUJITSU LTD·Filed 1997·Granted Jun 1, 1999·70 cites·14 claims
- 2579US8320772B2Optical transmission apparatusOOI HIROKI·Filed 2011·Granted Nov 27, 2012·5 cites·4 claims
- 2679US7035548B2Polarization-mode dispersion detecting method, and a dispersion compensation controlling apparatus and a dispersion compensation controlling methodFUJITSU LTD·Filed 2004·Granted Apr 25, 2006·16 cites·15 claims
- 2779US6606424B2Apparatus and method for optical modulation and demodulationFUJITSU LTD·Filed 2000·Granted Aug 12, 2003·20 cites·29 claims
- 2878US8948593B2Optical network interconnect deviceOOI HIROKI·Filed 2011·Granted Feb 3, 2015·4 cites·7 claims
- 2977US8625996B2Optical transmitter, optical transmission method, and wavelength-selective variable delayerTANAKA TOSHIKI·Filed 2007·Granted Jan 7, 2014·6 cites·10 claims
- 3076US7006770B2Optical receiving station, optical communication system, and dispersion controlling methodFUJITSU LTD·Filed 2001·Granted Feb 28, 2006·12 cites·15 claims
- 3176US6728491B1Polarization-mode dispersion detecting method, and a dispersion compensation controlling apparatus and a dispersion compensation controlling methodFUJITSU LTD·Filed 1999·Granted Apr 27, 2004·44 cites·12 claims
- 3275US8849113B2Wavelength selective switch and optical transmission apparatusOOI HIROKI·Filed 2012·Granted Sep 30, 2014·3 cites·5 claims
- 3375US7418211B2Control apparatus and control method for optical modulatorFUJITSU LTD·Filed 2004·Granted Aug 26, 2008·12 cites·7 claims
- 3475US5917628AOptical time-division multiplexer capable of supplying stable output signalFUJITSU LTD·Filed 1997·Granted Jun 29, 1999·41 cites·9 claims
- 3575US5870213AOptical transmission system, optical multiplexing transmission system, and related peripheral techniquesFUJITSU LTD·Filed 1998·Granted Feb 9, 1999·51 cites·16 claims
- 3674US8295703B2Optical transmission apparatusMIURA AKIRA·Filed 2009·Granted Oct 23, 2012·5 cites·16 claims
- 3774US6411416B1Method and apparatus for minimizing the intensity of a specific frequency component of an optical signal travelling through an optical fiber transmission line to thereby minimize the total dispersionFUJITSU LTD·Filed 1998·Granted Jun 25, 2002·46 cites·74 claims
- 3873US7778553B2Optical transmitterFUJITSU LTD·Filed 2006·Granted Aug 17, 2010·5 cites·13 claims
- 3972US9065570B2Optical amplifier with feedback to obtain set gain and gain tiltSHUKUNAMI NORIFUMI·Filed 2011·Granted Jun 23, 2015·3 cites·9 claims
- 4072US7480459B2Wavelength division multiplexing transmission systemFUJITSU LTD·Filed 2004·Granted Jan 20, 2009·10 cites·36 claims
- 4172US6829440B2Method and apparatus for compensation of polarization-mode dispersionFUJITSU LTD·Filed 2001·Granted Dec 7, 2004·13 cites·21 claims
- 4271US7983564B2Transmission system and transmission methodFUJITSU LTD·Filed 2008·Granted Jul 19, 2011·4 cites·16 claims
- 4371US7869715B2Dispersion compensating apparatus and dispersion compensation control methodFUJITSU LTD·Filed 2007·Granted Jan 11, 2011·4 cites·13 claims
- 4470US9515727B2In-band optical signal-to-noise ratio monitorFUJITSU LTD·Filed 2015·Granted Dec 6, 2016·2 cites·3 claims
- 4570US7433599B2Automatic dispersion compensation device and compensation methodFUJITSU LTD·Filed 2003·Granted Oct 7, 2008·11 cites·17 claims
- 4670US7389049B2Chromatic dispersion compensation controlling systemFUJITSU LTD·Filed 2004·Granted Jun 17, 2008·11 cites·2 claims
- 4770US7218856B2System for compensating for chromatic dispersion and polarization mode dispersionFUJITSU LTD·Filed 2004·Granted May 15, 2007·11 cites·22 claims
- 4870US6118564AOptical time division demultiplexing apparatus and demultiplexed signal switching method as well as optical time division multiplex transmission systemFUJITSU LTD·Filed 1997·Granted Sep 12, 2000·35 cites·56 claims
- 4969US5982530AApparatus for driving an optical modulator to measure, and compensate for, dispersion in an optical transmission lineFUJITSU LTD·Filed 1999·Granted Nov 9, 1999·29 cites·11 claims
- 5069US5760937AOptical demultiplexerFUJITSU LTD·Filed 1997·Granted Jun 2, 1998·39 cites·11 claims
Showing the top 50 of 86 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →