Inventor
MASUDA HIROJI
JP17 patents
⚠️ This page may combine multiple inventors who share the name “MASUDA HIROJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NIPPON TELEGRAPH & TELEPHONE
14 patentsUS6172803B1Jan 9, 2001
Optical amplifier and transmission system using the same
NIPPON TELEGRAPH & TELEPHONE70 citations96
US5471334ANov 28, 1995
Method and apparatus for monitoring noise figure of optical amplifier
NIPPON TELEGRAPH & TELEPHONE62 citations96
US5245690ASep 14, 1993
Optical fiber amplifier including rare earth doped fiber and feedback pump light source control
NIPPON TELEGRAPH & TELEPHONE67 citations96
US6771414B2Aug 3, 2004
Optical fiber amplifier and optical communication system using the same
NIPPON TELEGRAPH & TELEPHONE18 citations92
US6678087B1Jan 13, 2004
Optical amplifier and optical fiber communication system using the amplifier
NIPPON TELEGRAPH & TELEPHONE28 citations92
US6900885B2May 31, 2005
White light source
NIPPON TELEGRAPH & TELEPHONE12 citations84
US6721092B2Apr 13, 2004
Thulium-doped fiber amplifier using pump light for improving conversion efficiency in S-band
NIPPON TELEGRAPH & TELEPHONE14 citations83
US7042634B2May 9, 2006
Optical amplifier
NIPPON TELEGRAPH & TELEPHONE6 citations73
US6469826B1Oct 22, 2002
Optical amplifier
NIPPON TELEGRAPH & TELEPHONE11 citations73
US7538937B2May 26, 2009
Optical amplifier
NIPPON TELEGRAPH & TELEPHONE2 citations62
US7379236B2May 27, 2008
Optical fiber communication system using remote pumping
NIPPON TELEGRAPH & TELEPHONE2 citations62
US6583924B2Jun 24, 2003
Optical amplifier
NIPPON TELEGRAPH & TELEPHONE2 citations62
US7589888B2Sep 15, 2009
Optical amplifier having a constant gain profile
NIPPON TELEGRAPH & TELEPHONE0 citations51
US7920793B2Apr 5, 2011
Inline repeater and optical fiber communication system
NIPPON TELEGRAPH & TELEPHONE0 citations42