Inventor
KAGI NOBUYUKI
JP8 patents
Patents
8 patentsUS5262365ANov 16, 1993
Quartz glass doped with rare earth element and production thereof
FURUKAWA ELECTRIC CO LTD61 citations94
US6636659B2Oct 21, 2003
Optical amplification apparatus and optical transmission system
FURUKAWA ELECTRIC CO LTD15 citations83
US6538803B1Mar 25, 2003
Optical amplifier and optical wavelength division multiplexing communication system
FURUKAWA ELECTRIC CO LTD2 citations60
US7852550B2Dec 14, 2010
Optical amplifying apparatus
FURUKAWA ELECTRIC CO LTD3 citations59
US7511883B2Mar 31, 2009
Optical amplifying method, optical amplifying apparatus, and optical amplified transmission system using the apparatus
FURUKAWA ELECTRIC CO LTD4 citations58
US10126556B2Nov 13, 2018
Light operation device
FURUKAWA ELECTRIC CO LTD1 citations49
US9071035B2Jun 30, 2015
Optical amplifier and method of controlling optical amplifier
FURUKAWA ELECTRIC CO LTD1 citations49
US7333262B2Feb 19, 2008
Optical amplifying method, optical amplifying apparatus, and optical amplified transmission system using the apparatus
FURUKAWA ELECTRIC CO LTD0 citations48