Inventor
HAYASHI ETSUKO
JP45 patents
⚠️ This page may combine multiple inventors who share the name “HAYASHI ETSUKO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJITSU LTD
42 patentsUS6388801B1May 14, 2002
Optical amplification apparatus utilizing Raman amplification and controlling method thereof
FUJITSU LTD134 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
US7359112B2Apr 15, 2008
Individual band gain equalizer for optical amplifiers
FUJITSU LTD20 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
US6441951B1Aug 27, 2002
Optical amplification apparatus using Raman amplification
FUJITSU LTD32 citations92
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
US7715093B2May 11, 2010
Individual band gain equalizer for optical amplifiers
FUJITSU LTD12 citations84
US7616848B2Nov 10, 2009
Optical transmission apparatus
FUJITSU LTD8 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
US7127139B2Oct 24, 2006
Optical multiplexing method and optical multiplexer, and optical amplifier using same
FUJITSU LTD12 citations84
US7061669B2Jun 13, 2006
Optical apparatus with loss compensation capability and optical amplifier for loss compensation
FUJITSU LTD14 citations84
US6823107B2Nov 23, 2004
Method and device for optical amplification
FUJITSU LTD15 citations84
US8054455B2Nov 8, 2011
Optical amplifier provided with control function of pumping light, and optical transmission system using the same
FUJITSU LTD6 citations74
US7180654B2Feb 20, 2007
Raman amplifier
FUJITSU LTD8 citations74
US7072100B2Jul 4, 2006
Optical amplifier and gain tilt compensation method
FUJITSU LTD7 citations74
US6873455B2Mar 29, 2005
Optical amplification apparatus utilizing raman amplification and controlling method thereof
FUJITSU LTD8 citations74
US6847478B1Jan 25, 2005
Optical amplification apparatus using Raman amplification
FUJITSU LTD7 citations74
US6747790B2Jun 8, 2004
Optical amplifier for amplifying multi-wavelength light
FUJITSU LTD7 citations74
US7119950B2Oct 10, 2006
Amplification method and optical amplifier for wavelength division multiplexed signal light
FUJITSU LTD7 citations73
US7688498B2Mar 30, 2010
Optical amplifier and optical monitor circuit
FUJITSU LTD4 citations63
US7529022B2May 5, 2009
Raman amplifier and wavelength division multiplexing optical communication system, and method of controlling raman amplification
FUJITSU LTD2 citations63
US7400441B2Jul 15, 2008
Optical amplifier, optical amplification repeater and pump light supply control method
FUJITSU LTD4 citations63
US7394589B2Jul 1, 2008
Optical amplifier for wide band Raman amplification of wavelength division multiplexed (WDM) signal lights
FUJITSU LTD3 citations63
US7212335B2May 1, 2007
Apparatus and method for amplification medium performance simulation, and optical amplifier
FUJITSU LTD5 citations63
US7145718B2Dec 5, 2006
Control method of optical fiber amplifier and optical transmission system
FUJITSU LTD5 citations63
US6862133B2Mar 1, 2005
Raman amplifier and wavelength division multiplexing optical communication system, and method of controlling raman amplification
FUJITSU LTD3 citations63
US6741390B2May 25, 2004
Variable wavelength light source apparatus and optical amplifier using same
FUJITSU LTD3 citations63
US6891662B2May 10, 2005
Optical amplifier and method for amplifying wavelength multiplexed transmission signal light
FUJITSU LTD2 citations61
US7719758B2May 18, 2010
Optical amplifier provided with control function of pumping light, and optical transmission system using the same
FUJITSU LTD0 citations52
US7417791B2Aug 26, 2008
Optical amplifier for amplifying multi-wavelength light
FUJITSU LTD0 citations52
US7751119B2Jul 6, 2010
Optical surge suppressive type optical amplifier
FUJITSU LTD0 citations42
US7729588B2Jun 1, 2010
Optical fiber, manufacturing method of the same, and optical amplifier
FUJITSU LTD0 citations42
US7095553B2Aug 22, 2006
Optical amplifier and controlling method for Raman amplifier
FUJITSU LTD0 citations42
US7551347B2Jun 23, 2009
Optical amplification characteristics simulation apparatus and optical amplification characteristics simulation method
FUJITSU LTD0 citations40