Inventor
KAWASAKI YUMIKO
JP22 patents
Patents
22 patentsUS5764404AJun 9, 1998
Wavelength-division-multiplexing optical amplifier
FUJITSU LTD99 citations98
US5877881AMar 2, 1999
Optical transmission system
FUJITSU LTD126 citations97
US6738584B1May 18, 2004
Method for optical fiber communication, and terminal device and system for use in carrying out the method
FUJITSU LTD59 citations96
US6038063AMar 14, 2000
Optical amplifier and optical transmission system including the optical amplifier
FUJITSU LTD70 citations96
US5680246AOct 21, 1997
Optical amplifier and optical transmission apparatus
FUJITSU LTD64 citations96
US7006769B1Feb 28, 2006
Method for optical fiber communication, and device and system for use in carrying out the method
FUJITSU LTD32 citations92
US6823141B2Nov 23, 2004
Optical transmission system and dispersion compensator
FUJITSU LTD16 citations92
US6570691B1May 27, 2003
Optical transmission system using in-line amplifiers
FUJITSU LTD23 citations92
US6449074B1Sep 10, 2002
Optical transmission device and optical communication system
FUJITSU LTD25 citations92
US6288836B1Sep 11, 2001
Optical amplifier and optical communication system having the optical amplifier
FUJITSU LTD47 citations92
US5625481AApr 29, 1997
Auxiliary-signal transmission system
FUJITSU LTD21 citations92
US6295147B1Sep 25, 2001
Wavelength multiplexing transmission apparatus and wavelength demultiplexing reception apparatus
FUJITSU LTD17 citations84
US7068876B1Jun 27, 2006
Method and system for optical transmission adopting dispersion compensation
FUJITSU LTD8 citations74
US6496288B2Dec 17, 2002
Wavelength multiplexing transmission apparatus and wavelength demultiplexing reception apparatus
FUJITSU LTD10 citations74
US6061173AMay 9, 2000
Wavelength-division-multiplexing optical amplifier
FUJITSU LTD8 citations74
US5841558ANov 24, 1998
Auxiliary-signal transmission system
FUJITSU LTD7 citations74
US5798857AAug 25, 1998
Auxiliary-signal transmission system
FUJITSU LTD6 citations74
US7116913B2Oct 3, 2006
Optical transmission system and dispersion compensator
FUJITSU LTD8 citations73
US7079771B2Jul 18, 2006
Wavelength multiplexing transmission apparatus and wavelength demultiplexing reception apparatus
FUJITSU LTD5 citations63
US7376361B2May 20, 2008
Optical transmission system and dispersion compensator
FUJITSU LTD3 citations62
US7263296B2Aug 28, 2007
Optical transmission system using in-line amplifiers
FUJITSU LTD3 citations62
US7116918B2Oct 3, 2006
Optical transmission system using in-line amplifiers
FUJITSU LTD0 citations52