Inventor · Kawasaki, JP

Etsuko Hayashi

46Patents
8h-index
25Co-inventors
71Inventor score

Filing activity: Feb 13, 1996 → Feb 23, 2010

Most-cited inventions

PatentTitleAreaCited byStatus
US6388801B1 Optical amplification apparatus utilizing Raman amplification and controlling method thereof Electricity 76 Expired
US6510000B1 Optical amplifier for wide band raman amplification of wavelength division multiplexed (WDM) signal lights Electricity 46 Expired
US6624926B1 Optical amplifier with pump light source control for raman amplification Electricity 46 Expired
US6441951B1 Optical amplification apparatus using Raman amplification Electricity 15 Expired
US6891661B2 Optical amplifier with pump light source control for Raman amplification Electricity 14 Expired
US6738184B2 Optical amplifier for amplifying multi-wavelength light Electricity 12 Expired
US6577437B2 Optical amplification apparatus utilizing Raman amplification and controlling method thereof Electricity 10 Expired
US7359112B2 Individual band gain equalizer for optical amplifiers Electricity 10 Expired
US6823107B2 Method and device for optical amplification Electricity 7 Expired
US7061669B2 Optical apparatus with loss compensation capability and optical amplifier for loss compensation Electricity 7 Expired
US7042636B2 Optical amplifier with pump light source control for Raman amplification Electricity 7 Expired
US7813642B2 Optical transmission apparatus and method of controlling the same Electricity 7 Active
US6683712B2 Optical amplification apparatus using Raman amplification Electricity 7 Expired
US7715093B2 Individual band gain equalizer for optical amplifiers Electricity 6 Active
US7843631B2 Gain control apparatus, optical transmission apparatus, gain control method for optical amplifier, and wavelength multiplex optical transmission system Electricity 6 Active
US7268936B2 Optical amplifier having polarization mode dispersion compensation function Electricity 5 Expired
US7362499B2 Optical amplifier with pump light source control for Raman amplification Electricity 5 Expired
US8054455B2 Optical amplifier provided with control function of pumping light, and optical transmission system using the same Electricity 5 Active
US6873455B2 Optical amplification apparatus utilizing raman amplification and controlling method thereof Electricity 5 Expired
US7127139B2 Optical multiplexing method and optical multiplexer, and optical amplifier using same Electricity 5 Expired
US7119950B2 Amplification method and optical amplifier for wavelength division multiplexed signal light Electricity 4 Expired
US7180654B2 Raman amplifier Electricity 4 Expired
US7072100B2 Optical amplifier and gain tilt compensation method Electricity 4 Expired
US6847478B1 Optical amplification apparatus using Raman amplification Electricity 4 Expired
US7505197B2 Optical amplifier provided with control function of pumping light, and optical transmission system using the same Electricity 4 Expired

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.