Inventor
SUGAYA YASUSHI
JP95 patents
⚠️ This page may combine multiple inventors who share the name “SUGAYA YASUSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJITSU LTD
49 patentsUS6388801B1May 14, 2002
Optical amplification apparatus utilizing Raman amplification and controlling method thereof
FUJITSU LTD134 citations99
US6055092AApr 25, 2000
Multi-wavelength light amplifier
FUJITSU LTD167 citations99
US6025947AFeb 15, 2000
Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are varied
FUJITSU LTD99 citations99
US5812710ASep 22, 1998
Apparatus and method for optical equalization and amplification
FUJITSU LTD179 citations99
US6624926B1Sep 23, 2003
Optical amplifier with pump light source control for raman amplification
FUJITSU LTD92 citations98
US6510000B1Jan 21, 2003
Optical amplifier for wide band raman amplification of wavelength division multiplexed (WDM) signal lights
FUJITSU LTD87 citations98
US5737118AApr 7, 1998
Optical amplifying apparatus
FUJITSU LTD117 citations98
US6198572B1Mar 6, 2001
Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are varied
FUJITSU LTD66 citations97
US6144485ANov 7, 2000
Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are varied
FUJITSU LTD55 citations97
US5995274ANov 30, 1999
Multi-wavelength light amplifier
FUJITSU LTD65 citations97
US5966237AOct 12, 1999
Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are varied
FUJITSU LTD66 citations97
US6865016B2Mar 8, 2005
Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are varied
FUJITSU LTD23 citations96
US6646791B2Nov 11, 2003
Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are varied
FUJITSU LTD22 citations96
US6480329B2Nov 12, 2002
Multi-wavelength light amplifier
FUJITSU LTD38 citations96
US6377395B2Apr 23, 2002
Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are varied
FUJITSU LTD28 citations96
US6369938B1Apr 9, 2002
Multi-wavelength light amplifier
FUJITSU LTD38 citations96
US6292289B1Sep 18, 2001
Method, device, and system for transmitting a supervisory optical signal
FUJITSU LTD53 citations96
US6288834B1Sep 11, 2001
Optical amplifier for amplifying light in a long wavelength band
FUJITSU LTD49 citations96
US6157481ADec 5, 2000
Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of the channels are varied
FUJITSU LTD44 citations96
US6038061AMar 14, 2000
Doped fiber amplifier using bidirectional pumping with pump lights having different frequencies
FUJITSU LTD65 citations96
US5995275ANov 30, 1999
Doped fiber amplifier using bidirectional pumping with pump lights having different frequencies
FUJITSU LTD64 citations96
US7227681B2Jun 5, 2007
Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are varied
FUJITSU LTD12 citations93
US6507431B1Jan 14, 2003
Remotely pumping type multi-wavelength light transmission system
FUJITSU LTD22 citations93
US5903385AMay 11, 1999
Remotely pumping type multi-wavelength light transmission system
FUJITSU LTD32 citations93
US7474459B2Jan 6, 2009
Multi-wavelength light amplifier
FUJITSU LTD12 citations92
US7224517B2May 29, 2007
Multi-wavelength light amplifier
FUJITSU LTD16 citations92
US7042636B2May 9, 2006
Optical amplifier with pump light source control for Raman amplification
FUJITSU LTD13 citations92
US6891661B2May 10, 2005
Optical amplifier with pump light source control for Raman amplification
FUJITSU LTD24 citations92
US6738184B2May 18, 2004
Optical amplifier for amplifying multi-wavelength light
FUJITSU LTD30 citations92
US6683712B2Jan 27, 2004
Optical amplification apparatus using Raman amplification
FUJITSU LTD13 citations92
US6577437B2Jun 10, 2003
Optical amplification apparatus utilizing Raman amplification and controlling method thereof
FUJITSU LTD22 citations92
US6496300B2Dec 17, 2002
Optical amplifier
FUJITSU LTD20 citations92
US6462861B2Oct 8, 2002
Optical amplifying apparatus and optical communication system
FUJITSU LTD45 citations92
US6441951B1Aug 27, 2002
Optical amplification apparatus using Raman amplification
FUJITSU LTD32 citations92
US6400499B2Jun 4, 2002
Multi-wavelength light amplifier
FUJITSU LTD24 citations92
US6483636B1Nov 19, 2002
Optical amplifier
FUJITSU LTD34 citations91
US9698902B2Jul 4, 2017
Optical transmission system and optical transmission device
FUJITSU LTD11 citations84
US7843631B2Nov 30, 2010
Gain control apparatus, optical transmission apparatus, gain control method for optical amplifier, and wavelength multiplex optical transmission system
FUJITSU LTD9 citations84
US7813642B2Oct 12, 2010
Optical transmission apparatus and method of controlling the same
FUJITSU LTD16 citations84
US7606488B2Oct 20, 2009
Wavelength-division-multiplexing optical transmission system and control method thereof
FUJITSU LTD9 citations84
US7505197B2Mar 17, 2009
Optical amplifier provided with control function of pumping light, and optical transmission system using the same
FUJITSU LTD8 citations84
US7362499B2Apr 22, 2008
Optical amplifier with pump light source control for Raman amplification
FUJITSU LTD10 citations84
US7268936B2Sep 11, 2007
Optical amplifier having polarization mode dispersion compensation function
FUJITSU LTD12 citations84
US6873795B1Mar 29, 2005
Apparatus for detecting peaks of wavelength-division-multiplexed light, and apparatus for controlling said light
FUJITSU LTD14 citations84
US6823107B2Nov 23, 2004
Method and device for optical amplification
FUJITSU LTD15 citations84
US7522839B2Apr 21, 2009
Method of upgrading optical node, and an optical node apparatus
FUJITSU LTD8 citations83
US7477447B2Jan 13, 2009
Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are varied
FUJITSU LTD7 citations82
US9007680B2Apr 14, 2015
Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are varied
FUJITSU LTD3 citations74
US8054455B2Nov 8, 2011
Optical amplifier provided with control function of pumping light, and optical transmission system using the same
FUJITSU LTD6 citations74
SUGAYA YASUSHI
1 patentShowing the top 50 of 95 patents by PatentIndex Score.