Inventor
SHIMOJOH NAOMASA
JP9 patents
Patents
9 patentsUS6930823B2Aug 16, 2005
Optical transmission method and optical transmission system utilizing Raman amplification
FUJITSU LTD24 citations92
US6882466B1Apr 19, 2005
Optical amplifier
FUJITSU LTD46 citations92
US6344914B1Feb 5, 2002
Gain equalizer which includes a plurality of optical filters for equalizing the gain of an optical amplifier
FUJITSU LTD38 citations92
US6606188B2Aug 12, 2003
Optical repeater using raman amplification, wavelength division multiplexed light transmission system, excitation light supply method and excitation light control method for raman amplification
FUJITSU LTD34 citations91
US6807376B2Oct 19, 2004
Gain equalizer which includes a plurality of optical filters for equalizing the gain of an optical amplifier
FUJITSU LTD7 citations73
US6061172AMay 9, 2000
Active optical fiber and optical fiber amplifier
FUJITSU LTD11 citations73
US6480328B2Nov 12, 2002
Optical amplifier and optical amplification method for amplifying wavelength division multiplexed signal light
FUJITSU LTD13 citations72
US6268955B1Jul 31, 2001
Optical amplifier and wave length division multiplexed light transmission system
FUJITSU LTD6 citations62
US6417960B1Jul 9, 2002
Method of equalizing gain utilizing asymmetrical loss-wavelength characteristics and optical amplifying apparatus using same
FUJITSU LTD6 citations61