Inventor
KOGA TADASHI
JP15 patents
⚠️ This page may combine multiple inventors who share the name “KOGA TADASHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NEC CORP
13 patentsUS5995254ANov 30, 1999
Wavelength division multiplexing light transmitting system
NEC CORP23 citations92
US5912754AJun 15, 1999
Method for transmitting WDM optical signal to be amplified by optical amplification repeaters and systems used in same
NEC CORP37 citations92
US6043922AMar 28, 2000
Optical receiver board, optical wavelength-tuning filter module used for optical receiver board, and actuator for optical wavelength-tuning filter module
NEC CORP52 citations91
US7212748B2May 1, 2007
Frequency detection circuit, optical receiver and optical transmission system using the same
NEC CORP7 citations72
US12267112B2Apr 1, 2025
Communication apparatus, communication system, communication method, and non-transitory computer readable medium
NEC CORP0 citations61
US11621783B2Apr 4, 2023
Optical receiver and receiving method
NEC CORP1 citations61
US10924190B2Feb 16, 2021
Optical receiver and optical reception method
NEC CORP0 citations61
US7991299B2Aug 2, 2011
Optical transmitter with driving voltage control and method
NEC CORP4 citations61
US7860409B2Dec 28, 2010
Optical receiver, optical receiving apparatus using the optical receiver and optical receiving method thereof
NEC CORP2 citations61
US11073706B2Jul 27, 2021
Transmitter and bias adjustment method
NEC CORP0 citations51
US10355786B2Jul 16, 2019
Optical modulator, optical transmitter, and optical modulation method
NEC CORP0 citations40
US9654228B2May 16, 2017
Signal reception processing apparatus and method for processing received signal
NEC CORP0 citations40
US6369922B1Apr 9, 2002
Wavelength division multiplex optical transmission apparatus
NEC CORP0 citations40