Inventor
ISHIKAWA GEORGE
JP75 patents
Patents
50 patentsUS6081360AJun 27, 2000
Method and apparatus for optimizing dispersion in an optical fiber transmission line in accordance with an optical signal power level
FUJITSU LTD147 citations99
US5917637AJun 29, 1999
Method of and device for driving optical modulator, and optical communications system
FUJITSU LTD159 citations99
US5717510AFeb 10, 1998
Optimized optical transmission system for high capacity transmission
FUJITSU LTD199 citations99
US6661974B1Dec 9, 2003
Optical transmitter and optical transmission system
FUJITSU LTD102 citations98
US6362913B2Mar 26, 2002
Optical modulation apparatus and method of controlling optical modulator
FUJITSU LTD97 citations98
US5926297AJul 20, 1999
Optical modulating device and optical modulating method
FUJITSU LTD99 citations98
US5991477ANov 23, 1999
Optical transmission system, optical multiplexing transmission system, and related peripheral techniques
FUJITSU LTD80 citations97
US5909297AJun 1, 1999
Drift compensating circuit for optical modulators in an optical system
FUJITSU LTD70 citations97
US5815294ASep 29, 1998
Optical transmission system with transmission characteristic measuring device
FUJITSU LTD71 citations97
US5696614ADec 9, 1997
Optical wavelength multiplex transmission method and optical dispersion compensation method
FUJITSU LTD85 citations97
US6728491B1Apr 27, 2004
Polarization-mode dispersion detecting method, and a dispersion compensation controlling apparatus and a dispersion compensation controlling method
FUJITSU LTD44 citations96
US6417945B2Jul 9, 2002
Optical wavelength multiplex transmission method and optical dispersion compensation method
FUJITSU LTD30 citations96
US6320687B1Nov 20, 2001
Dispersion compensation apparatus including a fixed dispersion compensator for coarse compensation and a variable dispersion compensator for fine compensation
FUJITSU LTD80 citations96
US6278539B1Aug 21, 2001
Optical modulation apparatus and method of controlling
FUJITSU LTD58 citations96
US6243176B1Jun 5, 2001
Optical wavelength multiplex transmission method and optical dispersion compensation method
FUJITSU LTD34 citations96
US5896217AApr 20, 1999
Optical transmission system, optical multiplexing transmission system, and related peripheral techniques
FUJITSU LTD46 citations96
US5870213AFeb 9, 1999
Optical transmission system, optical multiplexing transmission system, and related peripheral techniques
FUJITSU LTD51 citations96
US5805321ASep 8, 1998
Control unit for optical modulators producing multiplexed optical output signal
FUJITSU LTD83 citations96
US5760937AJun 2, 1998
Optical demultiplexer
FUJITSU LTD39 citations96
US5754322AMay 19, 1998
Optical transmission system, optical multiplexing transmission system, and related peripheral techniques
FUJITSU LTD43 citations96
US5636046AJun 3, 1997
Optical dispersion compensation method using transmissible band determined from synergetic effect of self phase modulation and group velocity dispersion
FUJITSU LTD48 citations96
US5612807AMar 18, 1997
Optical dispersion compensation method for shifting a zero dispersion wavelength of an optical fiber to compensate for dispersion in an optical system
FUJITSU LTD31 citations96
US5602666AFeb 11, 1997
Optical dispersion compensation method for shifting a zero dispersion wavelength of an optical fiber to compensate for dispersion in an optical system
FUJITSU LTD56 citations96
US7035548B2Apr 25, 2006
Polarization-mode dispersion detecting method, and a dispersion compensation controlling apparatus and a dispersion compensation controlling method
FUJITSU LTD16 citations93
US6925262B2Aug 2, 2005
Method and system for compensating chromatic dispersion
FUJITSU LTD32 citations93
US6606424B2Aug 12, 2003
Apparatus and method for optical modulation and demodulation
FUJITSU LTD20 citations93
US6501580B1Dec 31, 2002
Method and apparatus for optimizing dispersion in an optical fiber transmission line in accordance with an optical signal power level
FUJITSU LTD25 citations93
US6456411B1Sep 24, 2002
Method of setting signal wavelength in optical transmission system
FUJITSU LTD31 citations93
US6411416B1Jun 25, 2002
Method 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 dispersion
FUJITSU LTD46 citations93
US6262828B1Jul 17, 2001
Method and apparatus of driving an optical modulator to measure, and compensate for, dispersion in an optical transmission line
FUJITSU LTD23 citations93
US6118564ASep 12, 2000
Optical time division demultiplexing apparatus and demultiplexed signal switching method as well as optical time division multiplex transmission system
FUJITSU LTD35 citations93
US5982530ANov 9, 1999
Apparatus for driving an optical modulator to measure, and compensate for, dispersion in an optical transmission line
FUJITSU LTD29 citations93
US5973816AOct 26, 1999
Method and apparatus of driving an optical modulator to measure, and compensation for dispersion in an optical transmission line
FUJITSU LTD20 citations93
US5917628AJun 29, 1999
Optical time-division multiplexer capable of supplying stable output signal
FUJITSU LTD41 citations93
US5253097AOct 12, 1993
Demodulator and a polarization diversity receiver for coherent optical communication provided with the demodulator
FUJITSU LTD31 citations93
US6204949B1Mar 20, 2001
Method and device for extracting a timing signal
FUJITSU LTD32 citations92
US7480459B2Jan 20, 2009
Wavelength division multiplexing transmission system
FUJITSU LTD10 citations84
US7433599B2Oct 7, 2008
Automatic dispersion compensation device and compensation method
FUJITSU LTD11 citations84
US7389049B2Jun 17, 2008
Chromatic dispersion compensation controlling system
FUJITSU LTD11 citations84
US7218856B2May 15, 2007
System for compensating for chromatic dispersion and polarization mode dispersion
FUJITSU LTD11 citations84
US7006770B2Feb 28, 2006
Optical receiving station, optical communication system, and dispersion controlling method
FUJITSU LTD12 citations84
US6829440B2Dec 7, 2004
Method and apparatus for compensation of polarization-mode dispersion
FUJITSU LTD13 citations84
US7860408B2Dec 28, 2010
Interferometer for demodulating differential M-phase shift keying signal
FUJITSU LTD9 citations83
US6573985B2Jun 3, 2003
Wavelength dispersion measuring device and a method thereof
FUJITSU LTD17 citations83
US7925171B2Apr 12, 2011
Optical transmission apparatus
FUJITSU LTD11 citations82
US6384943B2May 7, 2002
Optical wavelength multiplex transmission method and optical dispersion compensation method
FUJITSU LTD13 citations82
US6275314B1Aug 14, 2001
Optical wavelength multiplex transmission method and optical dispersion compensation method
FUJITSU LTD13 citations82
US6252687B1Jun 26, 2001
Optical wavelength multiplex transmission method and optical dispersion compensation method
FUJITSU LTD13 citations82
US6252688B1Jun 26, 2001
Optical wavelength multiplex transmission method and optical dispersion compensation method
FUJITSU LTD13 citations82
US7583895B2Sep 1, 2009
Polarization scrambler, optical add/drop multiplexer, optical route switching apparatus and wavelength division multiplexing optical transmission system
FUJITSU LTD7 citations74
Showing the top 50 of 75 patents by PatentIndex Score.