Inventor
ISHIWADA TAKASHI
JP3 patents
Patents
3 patentsUS7209284B2Apr 24, 2007
Optical amplifier using reflection-type variable optical attenuator for feedback
FUJITSU LTD5 citations61
US7016096B2Mar 21, 2006
Transmission wavelength characteristics variable optical element, and wavelength characteristics variable apparatus, optical amplifier, and optical transmission system, using same
FUJITSU LTD4 citations60
US6862126B2Mar 1, 2005
Transmission wavelength characteristics variable optical element, and wavelength characteristics variable apparatus, optical amplifier, optical transmission system, and control method of transmission wavelength characteristics, using same
FUJITSU LTD3 citations60