Inventor
KAI YUTAKA
JP61 patents
⚠️ This page may combine multiple inventors who share the name “KAI YUTAKA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJITSU LTD
42 patentsUS7817923B2Oct 19, 2010
Optical transmitting apparatus, optical receiving apparatus, and optical communication system comprising them
FUJITSU LTD55 citations98
US6351323B1Feb 26, 2002
Optical transmission apparatus, optical transmission system, and optical terminal station
FUJITSU LTD87 citations98
US6285479B1Sep 4, 2001
Optical cross connect unit, optical add-drop multiplexer, light source unit, and adding unit
FUJITSU LTD66 citations96
US6278536B1Aug 21, 2001
Optical transmission device for bi-directional optical communication
FUJITSU LTD74 citations96
US6782017B1Aug 24, 2004
Wavelength locker and wavelength discriminating apparatus
FUJITSU LTD51 citations93
US6462844B1Oct 8, 2002
Wavelength-division multiplexing transmission system, a method for designing a loss difference compensator for optical devices used in the wavelength-division multiplexing transmission system, and a method for configuring the wavelength-division multiplexing transmission system
FUJITSU LTD22 citations93
US6154588ANov 28, 2000
Dispersion compensation apparatus
FUJITSU LTD26 citations93
US7362925B2Apr 22, 2008
Control method and control apparatus of optical device
FUJITSU LTD18 citations92
US6934433B2Aug 23, 2005
Control method and control apparatus of optical device
FUJITSU LTD17 citations92
US6583900B2Jun 24, 2003
Optical transmission apparatus, optical transmission system, and optical terminal station
FUJITSU LTD27 citations92
US9467229B2Oct 11, 2016
Multilevel intensity modulation and demodulation system and method
FUJITSU LTD12 citations84
US7643751B2Jan 5, 2010
Network managing apparatus, optical add/drop multiplexer, and network managing method
FUJITSU LTD10 citations84
US7433601B2Oct 7, 2008
Optical network and optical add/drop apparatus
FUJITSU LTD11 citations84
US6785306B2Aug 31, 2004
Wavelength-tunable stabilizer laser
FUJITSU LTD16 citations84
US7292787B1Nov 6, 2007
Selected-wavelength tuning filter and optical add/drop multiplexer
FUJITSU LTD12 citations83
US6996142B2Feb 7, 2006
Light source device and wavelength control device therefor
FUJITSU LTD9 citations74
US9998230B2Jun 12, 2018
Optical transmitter, optical communication system, and optical transmission/reception control method
FUJITSU LTD2 citations73
US9876601B2Jan 23, 2018
Optical transmission system, controller for wavelength tunable filter, and control method of wavelength tunable filter
FUJITSU LTD4 citations73
US9853728B2Dec 26, 2017
Method for determining numbers of bits allocated to subcarriers and optical transmission system
FUJITSU LTD3 citations73
US9425897B2Aug 23, 2016
Transmission apparatus, transmission system, and transmission method
FUJITSU LTD3 citations73
US8019219B2Sep 13, 2011
Optical packet switching apparatus and method therefor
FUJITSU LTD2 citations63
US7826744B2Nov 2, 2010
Optical network system and transmission apparatus
FUJITSU LTD3 citations63
US7546043B2Jun 9, 2009
Optical communication system
FUJITSU LTD6 citations63
US7406262B2Jul 29, 2008
Optical transmission device
FUJITSU LTD5 citations63
US7366426B2Apr 29, 2008
Optical add/drop multiplexer using tunable filter and method for feedback controlling the tunable filter
FUJITSU LTD4 citations63
US7308168B2Dec 11, 2007
Optical switch apparatus and control information updating method therein
FUJITSU LTD2 citations63
US6545784B2Apr 8, 2003
Optical cross connect unit, optical add-drop multiplexer, light source unit, and adding unit
FUJITSU LTD4 citations63
US7898341B2Mar 1, 2011
Non-inverting amplifier circuit and optical switch driver circuit
FUJITSU LTD4 citations62
US7791793B2Sep 7, 2010
Semiconductor optical amplifier gate switch drive circuit, semiconductor optical amplifier gate switching device, and optical cross connect
FUJITSU LTD2 citations62
US7181094B2Feb 20, 2007
Apparatus for controlling acousto-optic tunable filter and method of selecting wavelength
FUJITSU LTD3 citations62
US6947630B2Sep 20, 2005
Control method and control apparatus for variable wavelength optical filter
FUJITSU LTD5 citations62
US6895141B2May 17, 2005
Control method and device for optical filter, and optical node device
FUJITSU LTD6 citations62
US7462812B2Dec 9, 2008
Optical switch apparatus and optical switching system
FUJITSU LTD4 citations61
US7368700B2May 6, 2008
Optical switch apparatus and optical switching system
FUJITSU LTD2 citations61
US7187814B2Mar 6, 2007
Optical add/drop device
FUJITSU LTD5 citations61
US10027408B2Jul 17, 2018
Multi-carrier optical transmission system, optical transmitter, and optical receiver
FUJITSU LTD1 citations52
US9973276B2May 15, 2018
Optical receiving device and method for controlling dispersion compensation amount
FUJITSU LTD1 citations52
US8032028B2Oct 4, 2011
Optical add/drop device
FUJITSU LTD1 citations52
US12505379B2Dec 23, 2025
Computer-readable recording medium storing machine learning program, machine learning method, and information processing device of improving performance of learning skip in training machine learning model
FUJITSU LTD0 citations51
US7848600B2Dec 7, 2010
Driving circuit of optical gate switch
FUJITSU LTD0 citations51
US7405858B2Jul 29, 2008
Acousto-optic tunable filter control apparatus automatically adjusting frequency and power of radio frequency signal
FUJITSU LTD0 citations51
US9998233B2Jun 12, 2018
Optical reception apparatus
FUJITSU LTD0 citations42
KAI YUTAKA
4 patentsUS8538259B2Sep 17, 2013
Optical access network system
KAI YUTAKA9 citations84
US8170416B2May 1, 2012
Optical switching device
KAI YUTAKA7 citations83
US8582984B2Nov 12, 2013
Waveform controller, responsive element module, optical switch apparatus, responsive element and optical switch apparatus control method
KAI YUTAKA6 citations73
US8331780B2Dec 11, 2012
Optical packet switching apparatus and optical packet switching method
KAI YUTAKA1 citations52
AKIYAMA YUICHI
1 patentSONE KYOSUKE
1 patentYOSHIDA SETSUO
1 patentNOGUCHI MASAJI
1 patentShowing the top 50 of 61 patents by PatentIndex Score.