Inventor
KIKUCHI NOBUHIKO
JP42 patents
⚠️ This page may combine multiple inventors who share the name “KIKUCHI NOBUHIKO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
19 patentsUS7978390B2Jul 12, 2011
Optical modulator
HITACHI LTD61 citations98
US6671464B1Dec 30, 2003
Polarization mode dispersion compensator and compensation method
HITACHI LTD55 citations96
US6532320B1Mar 11, 2003
Equipments, transpondor and methods for optical fiber transmission
HITACHI LTD55 citations96
US5606445AFeb 25, 1997
Optical transmission system
HITACHI LTD35 citations93
US6850713B2Feb 1, 2005
Optical single sideband transmitter
HITACHI LTD44 citations92
US6587260B2Jul 1, 2003
Band-expanding method for optical amplifiers and optical transmission apparatus
HITACHI LTD21 citations92
US6850663B2Feb 1, 2005
Equipments including transponder for optical fiber transmission
HITACHI LTD15 citations84
US6891659B2May 10, 2005
Optical amplifiers, optical fiber raman amplifiers and optical systems
HITACHI LTD9 citations74
US5995278ANov 30, 1999
Optical transmission system
HITACHI LTD9 citations74
US5880876AMar 9, 1999
Optical transmission system
HITACHI LTD9 citations74
US9178617B2Nov 3, 2015
Optical multilevel signal pre-equalization circuit, optical multilevel signal pre-equalization transmitter, and polarization-multiplexed pre-equalization transmitter
HITACHI LTD5 citations73
US9143846B2Sep 22, 2015
Wavelength-multiplexed optical transmission device, wavelength-multiplexed optical transmission system, wavelength-multiplexed optical transmission method
HITACHI LTD2 citations63
US7813655B2Oct 12, 2010
Signal waveform deterioration compensator
HITACHI LTD5 citations63
US7903975B2Mar 8, 2011
Optical add-drop multiplexer
HITACHI LTD5 citations62
US7769257B2Aug 3, 2010
Optical transmission system and signal speed converting apparatus
HITACHI LTD3 citations62
US9143265B2Sep 22, 2015
Optical polarization multilevel signal receiving apparatus, optical polarization multilevel signal transmitting apparatus, and optical polarization multilevel signal transmission apparatus
HITACHI LTD1 citations52
US9046653B2Jun 2, 2015
PDL compensator optical device, and PDL compensation method
HITACHI LTD1 citations51
US9485032B2Nov 1, 2016
Optical multilevel transmitter and optical transponder
HITACHI LTD0 citations48
US9467245B2Oct 11, 2016
Polarization multiplexing optical transceiver
HITACHI LTD0 citations42
KIKUCHI NOBUHIKO
9 patentsUS8184992B2May 22, 2012
Optical field receiver and optical transmission system
KIKUCHI NOBUHIKO70 citations97
US8873968B2Oct 28, 2014
Optical field receiver, optical multilevel signal receiver, and optical transmission system
KIKUCHI NOBUHIKO8 citations84
US8855503B2Oct 7, 2014
Optical receiver and optical transmission system
KIKUCHI NOBUHIKO9 citations84
US8805188B2Aug 12, 2014
Polarization-multiplexed optical transmission system, polarization-Multiplexed optical transmitter, and polarization-multiplexed optical receiver
KIKUCHI NOBUHIKO7 citations84
US8503887B2Aug 6, 2013
Pre-equalized optical transmitter and pre-equalized optical transmission system
KIKUCHI NOBUHIKO11 citations84
US8265489B2Sep 11, 2012
Optical field transmitter and optical field transmission system
KIKUCHI NOBUHIKO14 citations84
US8693886B2Apr 8, 2014
Optical transmission system
KIKUCHI NOBUHIKO6 citations73
US8655193B2Feb 18, 2014
Optical multi-level transmission system
KIKUCHI NOBUHIKO5 citations73
US8472807B2Jun 25, 2013
Optical field transmitter and optical transmission system
KIKUCHI NOBUHIKO0 citations41
HITACHI COMM TECH LTD
5 patentsUS7653311B2Jan 26, 2010
Optical wavelength add-drop multiplexer
HITACHI COMM TECH LTD22 citations92
US7650075B2Jan 19, 2010
Optical add-drop multiplexer, and optical network equipment using the same
HITACHI COMM TECH LTD12 citations84
US7515832B2Apr 7, 2009
Optical transmission equipment and integrated circuit
HITACHI COMM TECH LTD15 citations84
US7450288B2Nov 11, 2008
Optical modulation device, optical transmitter, and optical transmission equipment
HITACHI COMM TECH LTD9 citations84
US7616318B2Nov 10, 2009
Apparatus for measuring waveform of optical electric field, optical transmission apparatus connected thereto and a method for producing the optical transmission apparatus
HITACHI COMM TECH LTD7 citations74
OCLARO JAPAN INC
3 patentsUS10187158B2Jan 22, 2019
Optical communication system and optical transmitter
OCLARO JAPAN INC12 citations84
US10250333B2Apr 2, 2019
Optical communication system and optical transmitter
OCLARO JAPAN INC1 citations62
US10469170B2Nov 5, 2019
Optical transceiver, optical transmitter IC, and optical receiver IC
OCLARO JAPAN INC0 citations42