Inventor
UOMI KAZUHISA
JP41 patents
⚠️ This page may combine multiple inventors who share the name “UOMI KAZUHISA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
36 patentsUS5937274AAug 10, 1999
Fabrication method for AlGaIn NPAsSb based devices
HITACHI LTD135 citations98
US5912913AJun 15, 1999
Vertical cavity surface emitting laser, optical transmitter-receiver module using the laser, and parallel processing system using the laser
HITACHI LTD105 citations97
US5574289ANov 12, 1996
Semiconductor optical integrated device and light receiver using said device
HITACHI LTD60 citations96
US5119393AJun 2, 1992
Semiconductor laser device capable of controlling wavelength shift
HITACHI LTD81 citations96
US4885753ADec 5, 1989
Semiconductor laser device of variable wavelength type
HITACHI LTD69 citations96
US6236771B1May 22, 2001
Optical transmission apparatus
HITACHI LTD41 citations93
US5179567AJan 12, 1993
Semiconductor laser device, method of fabricating the same and optical system of utilizing the same
HITACHI LTD21 citations93
US5146513ASep 8, 1992
Semiconductor optical device and array of the same
HITACHI LTD31 citations93
US4894835AJan 16, 1990
Surface emitting type semiconductor laser
HITACHI LTD40 citations93
US4873691AOct 10, 1989
Wavelength-tunable semiconductor laser
HITACHI LTD46 citations93
US6546034B2Apr 8, 2003
Semiconductor laser device, semiconductor laser array device and optical fiber transmission system
HITACHI LTD28 citations92
US5363393ANov 8, 1994
Surface emitting semiconductor laser
HITACHI LTD28 citations92
US5177758AJan 5, 1993
Semiconductor laser device with plural active layers and changing optical properties
HITACHI LTD54 citations92
US5132981AJul 21, 1992
Semiconductor optical device
HITACHI LTD31 citations92
US4835578AMay 30, 1989
Semiconductor device having a quantum wire and a method of producing the same
HITACHI LTD26 citations92
US5654583AAug 5, 1997
Semiconductor device having first and second semiconductor structures directly bonded to each other
HITACHI LTD21 citations89
US5042049AAug 20, 1991
Semiconductor optical device
HITACHI LTD19 citations82
US4881235ANov 14, 1989
Semiconductor laser having a multiple quantum well structure doped with impurities
HITACHI LTD21 citations81
US5666455ASep 9, 1997
Waveguide device
HITACHI LTD9 citations74
US5572616ANov 5, 1996
Waveguide device
HITACHI LTD12 citations74
US5394491AFeb 28, 1995
Semiconductor optical switch and array of the same
HITACHI LTD7 citations74
US5073892ADec 17, 1991
Semiconductor laser device
HITACHI LTD11 citations74
US5044745ASep 3, 1991
Semiconductor optical switch and array of the same
HITACHI LTD13 citations74
US4752934AJun 21, 1988
Multi quantum well laser with parallel injection
HITACHI LTD13 citations74
US4752933AJun 21, 1988
Semiconductor laser
HITACHI LTD6 citations74
US5136601AAug 4, 1992
Semiconductor laser
HITACHI LTD8 citations73
US6606443B2Aug 12, 2003
Optical transmission device
HITACHI LTD11 citations72
US6459840B1Oct 1, 2002
Optical transmission device
HITACHI LTD12 citations72
US4881238ANov 14, 1989
Semiconductor laser having quantum well active region doped with impurities
HITACHI LTD17 citations72
US4811354AMar 7, 1989
Semiconductor laser
HITACHI LTD8 citations72
US4800565AJan 24, 1989
Semiconductor laser device having high optical intensity and reliability
HITACHI LTD9 citations72
US4780879AOct 25, 1988
Semiconductor laser device having little astigmatism
HITACHI LTD14 citations72
US5247592ASep 21, 1993
Semiconductor optical device and array of the same
HITACHI LTD4 citations63
US5170404ADec 8, 1992
Semiconductor laser device suitable for optical communications systems drive
HITACHI LTD5 citations63
US4797891AJan 10, 1989
Semiconductor laser
HITACHI LTD6 citations62
US4821275AApr 11, 1989
Laser diode
HITACHI LTD1 citations52
OPNEXT JAPAN INC
5 patentsUSRE38072EApr 8, 2003
Fabrication method for AlGaInNPAsSb based devices
OPNEXT JAPAN INC21 citations93
US6678479B1Jan 13, 2004
Semiconductor electro-absorption optical modulator integrated light emission element light emission element module and optical transmission system
OPNEXT JAPAN INC22 citations92
US7733929B2Jun 8, 2010
Wavelength tunable optical transmitter and optical transceiver
OPNEXT JAPAN INC8 citations82
USRE41336EMay 18, 2010
Fabrication method for algainnpassb based devices
OPNEXT JAPAN INC4 citations62
US7409113B2Aug 5, 2008
Semiconductor electro-absorption optical modulator, semiconductor electro-absorption optical modulator integrated laser, optical transmitter module and optical module
OPNEXT JAPAN INC4 citations60