Inventor
KOMATSU KEIRO
JP16 patents
⚠️ This page may combine multiple inventors who share the name “KOMATSU KEIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NEC CORP
15 patentsUS6192170B1Feb 20, 2001
Multiple-wavelength light source and method of controlling oscillation frequencies thereof
NEC CORP108 citations97
US6278170B1Aug 21, 2001
Semiconductor multiple quantum well mach-zehnder optical modulator and method for fabricating the same
NEC CORP69 citations96
US5825047AOct 20, 1998
Optical semiconductor device
NEC CORP119 citations96
US5841929ANov 24, 1998
Light wavelength filtering circuit and manufacturing method thereof
NEC CORP56 citations95
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
US5358896AOct 25, 1994
Method of producing optical integrated circuit
NEC CORP31 citations92
US5334551AAug 2, 1994
Method of making semiconductor optical guided-wave device
NEC CORP29 citations92
US5237639AAug 17, 1993
Optical waveguide formed of compound semiconductor materials and process of fabricating the optical waveguide
NEC CORP27 citations92
US5521994AMay 28, 1996
Semiconductor optical waveguide-integrated light-receiving device
NEC CORP30 citations90
US5455433AOct 3, 1995
Semiconductor optical guided-wave device
NEC CORP8 citations73
US5381023AJan 10, 1995
Semiconductor device for control of a signal light
NEC CORP12 citations73
US5119449AJun 2, 1992
Optical directional coupler switch
NEC CORP11 citations72
US4795241AJan 3, 1989
Device and method for providing optical bistability with free carrier recombination centers introduced into an optical guide surrounding semiconductor layer portion
NEC CORP5 citations62