Inventor
HAMAMOTO KIICHI
JP20 patents
⚠️ This page may combine multiple inventors who share the name “HAMAMOTO KIICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NEC CORP
14 patentsUS5841929ANov 24, 1998
Light wavelength filtering circuit and manufacturing method thereof
NEC CORP56 citations95
US6813068B2Nov 2, 2004
Semiconductor optical amplifier and semiconductor laser
NEC CORP19 citations92
US6768758B1Jul 27, 2004
Semiconductor laser, semiconductor optical amplifier, and production method thereof
NEC CORP25 citations92
US6148132ANov 14, 2000
Semiconductor optical amplifier
NEC CORP21 citations92
US5796883AAug 18, 1998
Optical integrated circuit and method for fabricating the same
NEC CORP22 citations92
US5770466AJun 23, 1998
Semiconductor optical integrated circuits and method for fabricating the same
NEC CORP32 citations92
US5565693AOct 15, 1996
Semiconductor optical integrated circuits
NEC CORP34 citations92
US5521994AMay 28, 1996
Semiconductor optical waveguide-integrated light-receiving device
NEC CORP30 citations90
US6205163B1Mar 20, 2001
Single-transverse-mode 1×N multi-mode interferometer type semiconductor laser device
NEC CORP18 citations84
US6117753ASep 12, 2000
Method of manufacturing compound semiconductor integrated circuit
NEC CORP7 citations74
US6445722B2Sep 3, 2002
Single-transverse-mode laser diode with multi-mode waveguide region and manufacturing method of the same
NEC CORP7 citations73
US6661960B2Dec 9, 2003
Semiconductor waveguide photodetector
NEC CORP2 citations62
US7466736B2Dec 16, 2008
Semiconductor laser diode, semiconductor optical amplifier, and optical communication device
NEC CORP2 citations58
US7262435B2Aug 28, 2007
Single-transverse-mode laser diode with multi-mode waveguide region and manufacturing method of the same
NEC CORP1 citations52