Inventor · disambiguated record
Yasushi Sugaya
Also filed as: SUGAYA YASUSHI
95 granted patents·4 pending applications·2,205 citations·filing 1996–2015
99Inventor score
Top patents by PatentIndex Score
99 records- 0199US6388801B1Optical amplification apparatus utilizing Raman amplification and controlling method thereofFUJITSU LTD·Filed 2001·Granted May 14, 2002·134 cites·25 claims
- 0298US6624926B1Optical amplifier with pump light source control for raman amplificationFUJITSU LTD·Filed 2000·Granted Sep 23, 2003·92 cites·41 claims
- 0398US6510000B1Optical amplifier for wide band raman amplification of wavelength division multiplexed (WDM) signal lightsFUJITSU LTD·Filed 2000·Granted Jan 21, 2003·87 cites·57 claims
- 0497US6055092AMulti-wavelength light amplifierFUJITSU LTD·Filed 1996·Granted Apr 25, 2000·167 cites·30 claims
- 0597US6025947AController which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are variedFUJITSU LTD·Filed 1997·Granted Feb 15, 2000·99 cites·11 claims
- 0697US5812710AApparatus and method for optical equalization and amplificationFUJITSU LTD·Filed 1996·Granted Sep 22, 1998·179 cites·27 claims
- 0795US6480329B2Multi-wavelength light amplifierFUJITSU LTD·Filed 2000·Granted Nov 12, 2002·38 cites·20 claims
- 0895US6377395B2Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are variedFUJITSU LTD·Filed 2001·Granted Apr 23, 2002·28 cites·20 claims
- 0995US5737118AOptical amplifying apparatusFUJITSU LTD·Filed 1996·Granted Apr 7, 1998·117 cites·12 claims
- 1094US6198572B1Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are variedFUJITSU LTD·Filed 1999·Granted Mar 6, 2001·66 cites·28 claims
- 1194US5995274AMulti-wavelength light amplifierFUJITSU LTD·Filed 1998·Granted Nov 30, 1999·65 cites·43 claims
- 1294US5966237AController which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are variedFUJITSU LTD·Filed 1998·Granted Oct 12, 1999·66 cites·30 claims
- 1393US6865016B2Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are variedFUJITSU LTD·Filed 2003·Granted Mar 8, 2005·23 cites·22 claims
- 1493US6646791B2Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are variedFUJITSU LTD·Filed 2002·Granted Nov 11, 2003·22 cites·10 claims
- 1593US6144485AController which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are variedFUJITSU LTD·Filed 1999·Granted Nov 7, 2000·55 cites·38 claims
- 1692US9698902B2Optical transmission system and optical transmission deviceFUJITSU LTD·Filed 2015·Granted Jul 4, 2017·11 cites·7 claims
- 1792US6462861B2Optical amplifying apparatus and optical communication systemFUJITSU LTD·Filed 2001·Granted Oct 8, 2002·45 cites·40 claims
- 1892US6441951B1Optical amplification apparatus using Raman amplificationFUJITSU LTD·Filed 2001·Granted Aug 27, 2002·32 cites·15 claims
- 1992US6400499B2Multi-wavelength light amplifierFUJITSU LTD·Filed 2001·Granted Jun 4, 2002·24 cites·21 claims
- 2091US7813642B2Optical transmission apparatus and method of controlling the sameFUJITSU LTD·Filed 2007·Granted Oct 12, 2010·16 cites·12 claims
- 2191US7477447B2Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are variedFUJITSU LTD·Filed 2007·Granted Jan 13, 2009·7 cites·14 claims
- 2291US6292289B1Method, device, and system for transmitting a supervisory optical signalFUJITSU LTD·Filed 2000·Granted Sep 18, 2001·53 cites·35 claims
- 2390US8553319B2Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are variedSUGAYA YASUSHI·Filed 2011·Granted Oct 8, 2013·5 cites·8 claims
- 2490US6157481AController which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of the channels are variedFUJITSU LTD·Filed 1999·Granted Dec 5, 2000·44 cites·10 claims
- 2589US6738184B2Optical amplifier for amplifying multi-wavelength lightFUJITSU LTD·Filed 2001·Granted May 18, 2004·30 cites·14 claims
- 2689US6577437B2Optical amplification apparatus utilizing Raman amplification and controlling method thereofFUJITSU LTD·Filed 2002·Granted Jun 10, 2003·22 cites·7 claims
- 2788US7224517B2Multi-wavelength light amplifierFUJITSU LTD·Filed 2002·Granted May 29, 2007·16 cites·43 claims
- 2888US6038061ADoped fiber amplifier using bidirectional pumping with pump lights having different frequenciesFUJITSU LTD·Filed 1998·Granted Mar 14, 2000·65 cites·20 claims
- 2988US5995275ADoped fiber amplifier using bidirectional pumping with pump lights having different frequenciesFUJITSU LTD·Filed 1997·Granted Nov 30, 1999·64 cites·26 claims
- 3087US9007680B2Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are variedFUJITSU LTD·Filed 2013·Granted Apr 14, 2015·3 cites·6 claims
- 3187US7362499B2Optical amplifier with pump light source control for Raman amplificationFUJITSU LTD·Filed 2006·Granted Apr 22, 2008·10 cites·7 claims
- 3287US7227681B2Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are variedFUJITSU LTD·Filed 2004·Granted Jun 5, 2007·12 cites·16 claims
- 3387US6891661B2Optical amplifier with pump light source control for Raman amplificationFUJITSU LTD·Filed 2003·Granted May 10, 2005·24 cites·19 claims
- 3486US6369938B1Multi-wavelength light amplifierFUJITSU LTD·Filed 1999·Granted Apr 9, 2002·38 cites·51 claims
- 3585US8054455B2Optical amplifier provided with control function of pumping light, and optical transmission system using the sameFUJITSU LTD·Filed 2010·Granted Nov 8, 2011·6 cites·13 claims
- 3685US7474459B2Multi-wavelength light amplifierFUJITSU LTD·Filed 2002·Granted Jan 6, 2009·12 cites·4 claims
- 3785US6483636B1Optical amplifierFUJITSU LTD·Filed 2000·Granted Nov 19, 2002·34 cites·23 claims
- 3884US7606488B2Wavelength-division-multiplexing optical transmission system and control method thereofFUJITSU LTD·Filed 2006·Granted Oct 20, 2009·9 cites·12 claims
- 3982US7843631B2Gain control apparatus, optical transmission apparatus, gain control method for optical amplifier, and wavelength multiplex optical transmission systemFUJITSU LTD·Filed 2007·Granted Nov 30, 2010·9 cites·14 claims
- 4082US7522839B2Method of upgrading optical node, and an optical node apparatusFUJITSU LTD·Filed 2005·Granted Apr 21, 2009·8 cites·11 claims
- 4182US7046431B1Light amplifier and light amplifying methodFUJITSU LTD·Filed 2005·Granted May 16, 2006·7 cites·15 claims
- 4281US8699126B2Multi-wavelength light amplifierFUJITSU LTD·Filed 2012·Granted Apr 15, 2014·2 cites·15 claims
- 4381US8615167B2WDM optical transmission system and control method thereofSUGAYA YASUSHI·Filed 2011·Granted Dec 24, 2013·5 cites·11 claims
- 4480US6922282B2Optical amplifier for amplifying multi-wavelength lightFUJITSU LTD·Filed 2004·Granted Jul 26, 2005·11 cites·11 claims
- 4579US6823107B2Method and device for optical amplificationFUJITSU LTD·Filed 2002·Granted Nov 23, 2004·15 cites·22 claims
- 4679US6288834B1Optical amplifier for amplifying light in a long wavelength bandFUJITSU LTD·Filed 1999·Granted Sep 11, 2001·49 cites·48 claims
- 4778US7042636B2Optical amplifier with pump light source control for Raman amplificationFUJITSU LTD·Filed 2004·Granted May 9, 2006·13 cites·1 claims
- 4878US6683712B2Optical amplification apparatus using Raman amplificationFUJITSU LTD·Filed 2002·Granted Jan 27, 2004·13 cites·2 claims
- 4977US7212335B2Apparatus and method for amplification medium performance simulation, and optical amplifierFUJITSU LTD·Filed 2005·Granted May 1, 2007·5 cites·25 claims
- 5076US8320040B2Multi-wavelength light amplifierSUGAYA YASUSHI·Filed 2011·Granted Nov 27, 2012·2 cites·18 claims
Showing the top 50 of 99 patent records by PatentIndex Score.
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