Inventor
OTSUKA KAZUE
JP17 patents
Patents
17 patentsUS5894362AApr 13, 1999
Optical communication system which determines the spectrum of a wavelength division multiplexed signal and performs various processes in accordance with the determined spectrum
FUJITSU LTD179 citations99
US6351323B1Feb 26, 2002
Optical transmission apparatus, optical transmission system, and optical terminal station
FUJITSU LTD87 citations98
US5841557ANov 24, 1998
Method and apparatus for scrambling the polarization of signal lights forming a wavelength division multiplexed signal light
FUJITSU LTD106 citations98
US5696614ADec 9, 1997
Optical wavelength multiplex transmission method and optical dispersion compensation method
FUJITSU LTD85 citations97
US6067187AMay 23, 2000
Optical amplifier and optical communication system employing the same
FUJITSU LTD60 citations96
US5636046AJun 3, 1997
Optical dispersion compensation method using transmissible band determined from synergetic effect of self phase modulation and group velocity dispersion
FUJITSU LTD48 citations96
US5612807AMar 18, 1997
Optical dispersion compensation method for shifting a zero dispersion wavelength of an optical fiber to compensate for dispersion in an optical system
FUJITSU LTD31 citations96
US5602666AFeb 11, 1997
Optical dispersion compensation method for shifting a zero dispersion wavelength of an optical fiber to compensate for dispersion in an optical system
FUJITSU LTD56 citations96
US6583900B2Jun 24, 2003
Optical transmission apparatus, optical transmission system, and optical terminal station
FUJITSU LTD27 citations92
US6538782B1Mar 25, 2003
Light branching/inserting apparatus and light branching apparatus using wavelength selection filter
FUJITSU LTD33 citations92
US5886804AMar 23, 1999
Optical transmission system employing single mode optical transmission fiber
FUJITSU LTD32 citations92
US6252687B1Jun 26, 2001
Optical wavelength multiplex transmission method and optical dispersion compensation method
FUJITSU LTD13 citations82
US6930824B1Aug 16, 2005
Optical amplifier which compensates for dispersion of a WDM optical signal
FUJITSU LTD11 citations74
US5856881AJan 5, 1999
Optical fiber transmission line
FUJITSU LTD5 citations74
US5790292AAug 4, 1998
Optical fiber transmission line
FUJITSU LTD7 citations74
US5440207AAug 8, 1995
Reference light source device using laser
FUJITSU LTD8 citations73
US7142785B2Nov 28, 2006
Light branching/inserting apparatus and light branching apparatus using wavelength selection filter
FUJITSU LTD4 citations63