Inventor
YAMANE KAZUO
JP45 patents
⚠️ This page may combine multiple inventors who share the name “YAMANE KAZUO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJITSU LTD
39 patentsUS5764404AJun 9, 1998
Wavelength-division-multiplexing optical amplifier
FUJITSU LTD99 citations98
US5877881AMar 2, 1999
Optical transmission system
FUJITSU LTD126 citations97
US6839160B2Jan 4, 2005
Method of activating optical communication system, channel increasing/decreasing method, and computer-readable recording medium
FUJITSU LTD171 citations96
US6738584B1May 18, 2004
Method for optical fiber communication, and terminal device and system for use in carrying out the method
FUJITSU LTD59 citations96
US6654561B1Nov 25, 2003
Method and apparatus for measuring optical signal-to-noise ratio, and pre-emphasis method and optical communication system each utilizing the method
FUJITSU LTD60 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
US6744958B2Jun 1, 2004
Apparatus and method of compensating for wavelength dispersion of optical transmission line
FUJITSU LTD24 citations93
US6282214B1Aug 28, 2001
Wavelength multiplexing light source
FUJITSU LTD19 citations93
US5434691AJul 18, 1995
Communications system having optical transmission line switching system
FUJITSU LTD28 citations93
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
US6760150B2Jul 6, 2004
Optical transmitting apparatus and an optical transmitting system
FUJITSU LTD23 citations92
US6570703B2May 27, 2003
Optical amplifying apparatus, optical amplifying method, and optical communication system
FUJITSU LTD25 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
US5870217AFeb 9, 1999
Multi-wavelength optical batch amplification apparatus
FUJITSU LTD53 citations92
US5625481AApr 29, 1997
Auxiliary-signal transmission system
FUJITSU LTD21 citations92
US5327275AJul 5, 1994
Switching system of optical transmission lines for protecting from trouble
FUJITSU LTD58 citations92
US4813048AMar 14, 1989
Semiconductor laser driving device
FUJITSU LTD31 citations92
US4965797AOct 23, 1990
Parallel-to-serial converter
FUJITSU LTD29 citations86
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
US4803384AFeb 7, 1989
Pulse amplifier suitable for use in the semiconductor laser driving device
FUJITSU LTD11 citations73
US7542677B2Jun 2, 2009
Dispersion compensation method in optical communication system having optical add drop multiplexing capability
FUJITSU LTD6 citations72
US7079771B2Jul 18, 2006
Wavelength multiplexing transmission apparatus and wavelength demultiplexing reception apparatus
FUJITSU LTD5 citations63
US4765735AAug 23, 1988
Method of measuring a mode partition characteristics of a laser diode and an apparatus of the same
FUJITSU LTD2 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
US4816699AMar 28, 1989
Slice amplifier using FET's
FUJITSU LTD3 citations62
US7274878B2Sep 25, 2007
Dispersion compensation method in optical communication system having optical add drop multiplexing capability
FUJITSU LTD2 citations61
US7397981B2Jul 8, 2008
Apparatus and method of compensating for wavelength dispersion of optical transmission line
FUJITSU LTD0 citations52
US7116918B2Oct 3, 2006
Optical transmission system using in-line amplifiers
FUJITSU LTD0 citations52