Inventor
KUWATSUKA HARUHIKO
JP16 patents
⚠️ This page may combine multiple inventors who share the name “KUWATSUKA HARUHIKO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJITSU LTD
11 patentsUS7875946B2Jan 25, 2011
Semiconductor photodetector that causes avalanche multiplication to occur only at photodetector portion located at central portion of mesa structure
FUJITSU LTD7 citations83
US8031394B2Oct 4, 2011
Wavelength conversion system, optical integrated device and wavelength conversion method
FUJITSU LTD6 citations73
US6542286B2Apr 1, 2003
Wavelength converting device and converting method
FUJITSU LTD7 citations73
US5751758AMay 12, 1998
Phase conjugate wave generating device, wavelength converting method, optical dispersion compensating method and multi-wavelength light generating device
FUJITSU LTD13 citations73
US9276162B2Mar 1, 2016
Semiconductor photodetector and method for manufacturing the same
FUJITSU LTD3 citations72
US6943422B2Sep 13, 2005
Semiconductor photodetecting device and method for fabricating the same
FUJITSU LTD5 citations72
US4984032AJan 8, 1991
Semiconductor photodiode
FUJITSU LTD14 citations72
US7436586B2Oct 14, 2008
Wavelength conversion system, optical integrated device and wavelength conversion method
FUJITSU LTD5 citations62
US6885039B2Apr 26, 2005
Semiconductor photodetector and avalanche photodiode
FUJITSU LTD6 citations62
US7507600B2Mar 24, 2009
Semiconductor photodetecting device and method for fabricating the same
FUJITSU LTD2 citations61
US7295366B2Nov 13, 2007
Optical integrated device and optical module
FUJITSU LTD1 citations52
SUMITOMO ELECTRIC INDUSTRIES
3 patentsUS9395504B2Jul 19, 2016
System to control wavelength and method to control wavelength
SUMITOMO ELECTRIC INDUSTRIES4 citations71
US9444221B2Sep 13, 2016
Laser apparatus and method to re-tune emission wavelength tunable LD
SUMITOMO ELECTRIC INDUSTRIES0 citations51
US9819149B2Nov 14, 2017
Optical transmitter implementing wavelength tunable diode
SUMITOMO ELECTRIC INDUSTRIES0 citations45