Inventor
EKAWA MITSURU
JP14 patents
⚠️ This page may combine multiple inventors who share the name “EKAWA MITSURU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJITSU LTD
10 patentsUS5987046ANov 16, 1999
Optical semiconductor device and a method of manufacturing the same
FUJITSU LTD82 citations95
US6034983AMar 7, 2000
Method of fabricating compound semiconductor device and optical semiconductor device
FUJITSU LTD27 citations92
US5937273AAug 10, 1999
Fabricating compound semiconductor by varying ratio of stagnant layer thickness and mean free path of seed material
FUJITSU LTD20 citations92
US6238943B1May 29, 2001
Optical semiconductor device and a method of manufacturing the same
FUJITSU LTD35 citations91
US6853661B2Feb 8, 2005
Gain-coupled semiconductor laser device lowering blue shift
FUJITSU LTD7 citations72
US7482617B2Jan 27, 2009
Optical semiconductor device and fabrication method thereof
FUJITSU LTD5 citations62
US6376338B2Apr 23, 2002
Manufacturing method of a semiconductor device having a diffraction grating
FUJITSU LTD5 citations62
US7804870B2Sep 28, 2010
Semiconductor optical device and manufacturing method thereof
FUJITSU LTD4 citations61
US7924896B2Apr 12, 2011
Optical semiconductor device
FUJITSU LTD0 citations51
US8987117B2Mar 24, 2015
Semiconductor optical integrated device and method for fabricating the same
FUJITSU LTD0 citations50
SUMITOMO ELECTRIC INDUSTRIES
3 patentsUS12455487B2Oct 28, 2025
Optical modulator and method of manufacturing optical modulator
SUMITOMO ELECTRIC INDUSTRIES0 citations62
US12206050B2Jan 21, 2025
Semiconductor optical device having distributed feed-back type laser and electroabsorption-type modulator
SUMITOMO ELECTRIC INDUSTRIES0 citations51
US11966104B2Apr 23, 2024
Optical modulator
SUMITOMO ELECTRIC INDUSTRIES0 citations51