Inventor
KIYONAGA TETSUYA
JP20 patents
Patents
20 patentsUS6643472B1Nov 4, 2003
APD bias circuit
FUJITSU LTD87 citations96
US5115332AMay 19, 1992
Receiver for coherent optical communication
FUJITSU LTD67 citations96
US4965858AOct 23, 1990
Polarization diversity optical receiver for coherent optical communication
FUJITSU LTD57 citations96
US6188738B1Feb 13, 2001
Clock extraction circuit
FUJITSU LTD77 citations95
US6590686B1Jul 8, 2003
Optical transmitter
FUJITSU LTD66 citations94
US5253097AOct 12, 1993
Demodulator and a polarization diversity receiver for coherent optical communication provided with the demodulator
FUJITSU LTD31 citations93
US6594070B2Jul 15, 2003
Optical communication system, optical receiver and wavelength converter
FUJITSU LTD19 citations92
US6229833B1May 8, 2001
Laser diode protecting circuit and laser driving current control circuit
FUJITSU LTD53 citations92
US6097746AAug 1, 2000
Laser diode protecting circuit
FUJITSU LTD26 citations92
US5808571ASep 15, 1998
Synchronization control unit which maintains synchronization between serial-to-parallel converters operating in parallel, or between parallel-to-serial converters operating in parallel
FUJITSU LTD35 citations92
US5652767AJul 29, 1997
Data decision circuit used in optical parallel receiving module, optical parallel receiving module, optical parallel transmission system and terminal structure of optical transmission fiber
FUJITSU LTD49 citations92
US5052051ASep 24, 1991
Heterodyne receiver for coherent optical communication
FUJITSU LTD49 citations92
US5050176ASep 17, 1991
Direct modulation phase-shift-keying system and method
FUJITSU LTD35 citations92
US6483625B2Nov 19, 2002
WDM optical transmission apparatus
FUJITSU LTD25 citations91
US5003626AMar 26, 1991
Dual balanced optical signal receiver
FUJITSU LTD39 citations89
US6501774B2Dec 31, 2002
Optical transmission apparatus for multiple wavelengths and optical transmission wavelength control method
FUJITSU LTD18 citations83
US7215894B2May 8, 2007
Optical transmitter device
FUJITSU LTD7 citations74
US7031621B2Apr 18, 2006
Optical receiving device
FUJITSU LTD8 citations73
US6065129AMay 16, 2000
Clock signal detection circuit
FUJITSU LTD4 citations61
US6282098B1Aug 28, 2001
Electronic circuit module, electronic circuit module connecting structure and connecting member, and method for connecting the same
FUJITSU LTD1 citations50