Inventor
LEE YOUNGKUN
JP5 patents
⚠️ This page may combine multiple inventors who share the name “LEE YOUNGKUN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
4 patentsUS6400864B1Jun 4, 2002
Broad band semiconductor optical amplifier module having optical amplifiers for amplifying demutiplexed signals of different wavelengths and optical communication system using it
HITACHI LTD26 citations88
US6931189B2Aug 16, 2005
Optical waveguides and optical devices with optical waveguides
HITACHI LTD7 citations72
US8350301B2Jan 8, 2013
Semiconductor photodiode device and manufacturing method thereof
HITACHI LTD2 citations62
US9523830B2Dec 20, 2016
Optical module and transmitting device
HITACHI LTD2 citations60