Inventor
IMAJUKU WATARU
JP16 patents
⚠️ This page may combine multiple inventors who share the name “IMAJUKU WATARU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NIPPON TELEGRAPH & TELEPHONE
15 patentsUS6867903B2Mar 15, 2005
Optical parametric circuit
NIPPON TELEGRAPH & TELEPHONE34 citations92
US6370169B1Apr 9, 2002
Method and apparatus for controlling optical wavelength based on optical frequency pulling
NIPPON TELEGRAPH & TELEPHONE29 citations92
US7012740B2Mar 14, 2006
Optical parametric circuit
NIPPON TELEGRAPH & TELEPHONE12 citations84
US7313328B2Dec 25, 2007
Node used in photonic network, and photonic network
NIPPON TELEGRAPH & TELEPHONE16 citations83
US7313094B2Dec 25, 2007
Node, an optical/electrical path integrated network using the node, and a program which controls the node
NIPPON TELEGRAPH & TELEPHONE16 citations83
US7289730B2Oct 30, 2007
Optical path communication network, node, and optical path setup method
NIPPON TELEGRAPH & TELEPHONE11 citations83
US7333424B2Feb 19, 2008
Upper layer node, lower layer node, and node control method
NIPPON TELEGRAPH & TELEPHONE7 citations73
US6909732B2Jun 21, 2005
Method and apparatus for controlling optical wavelength based on optical frequency pulling
NIPPON TELEGRAPH & TELEPHONE6 citations73
US10615868B2Apr 7, 2020
Communication system and fault detection method
NIPPON TELEGRAPH & TELEPHONE4 citations72
US10511381B2Dec 17, 2019
Communication system and fault location specifying method
NIPPON TELEGRAPH & TELEPHONE4 citations72
US10527781B2Jan 7, 2020
Communication system and connector
NIPPON TELEGRAPH & TELEPHONE1 citations62
US7023887B2Apr 4, 2006
Method and system for controlling optical wavelength based on optical frequency pulling
NIPPON TELEGRAPH & TELEPHONE2 citations62
US6560007B2May 6, 2003
Bit-phase synchronized optical pulse stream local generator
NIPPON TELEGRAPH & TELEPHONE5 citations61
US11108208B2Aug 31, 2021
Optical amplification system and optical amplification method
NIPPON TELEGRAPH & TELEPHONE0 citations51
US10686520B2Jun 16, 2020
Transmission quality estimation system, transmission quality estimation device, and transmission quality estimation method
NIPPON TELEGRAPH & TELEPHONE0 citations41