Inventor
AIDA RYUJI
JP24 patents
⚠️ This page may combine multiple inventors who share the name “AIDA RYUJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NEC LAB AMERICA INC
11 patentsUS9813182B2Nov 7, 2017
Submarine reconfigurable optical add/drop multiplexer with passive branching unit
NEC LAB AMERICA INC8 citations83
US9106983B2Aug 11, 2015
Reconfigurable branching unit for submarine optical communication networks
NEC LAB AMERICA INC13 citations83
US9654246B2May 16, 2017
Low cost secure submarine ROADM branching unit using bidirectional wavelength-selective switch
NEC LAB AMERICA INC2 citations73
US9654209B2May 16, 2017
Low cost secure ROADM branching unit with redundancy protection
NEC LAB AMERICA INC2 citations73
US9414134B2Aug 9, 2016
Secure wavelength selective switch-based reconfigurable branching unit for submarine network
NEC LAB AMERICA INC3 citations73
US11888583B2Jan 30, 2024
Integrated 3-way branching unit switch module having small footprint
NEC LAB AMERICA INC4 citations72
US11700067B2Jul 11, 2023
Three-way branching unit switch module having small footprint
NEC LAB AMERICA INC3 citations71
US9866346B2Jan 9, 2018
Redundancy protection for reconfigurable optical add/drop multiplexing (ROADM) branching unit
NEC LAB AMERICA INC1 citations52
US8989197B2Mar 24, 2015
Reconfigurable branching unit for submarine optical communication networks
NEC LAB AMERICA INC0 citations51
US10855392B2Dec 1, 2020
High-density submarine ROADM unit with remote WSS redundancy
NEC LAB AMERICA INC0 citations39
US9735914B2Aug 15, 2017
Mechanism for traffic privacy in reconfigurable add/drop multiplexer based submarine networks
NEC LAB AMERICA INC0 citations34
NEC CORP
11 patentsUS11159264B2Oct 26, 2021
Optical transmission device and optical transmission method
NEC CORP2 citations72
US11082145B2Aug 3, 2021
Optical branching/coupling device and optical branching/coupling method
NEC CORP1 citations72
US10715270B2Jul 14, 2020
Optical branching/coupling device and optical branching/coupling method
NEC CORP3 citations72
US10348440B2Jul 9, 2019
Power supply path-switching device, power supply path-switching system, and power supply path-switching method
NEC CORP2 citations72
US9912407B2Mar 6, 2018
Optical relay device, optical communication system, optical relay method, and storage medium
NEC CORP2 citations72
US11914191B2Feb 27, 2024
Optical branching/coupling device and optical branching/coupling method
NEC CORP0 citations62
US11438087B2Sep 6, 2022
Optical branching/coupling device and optical branching/coupling method
NEC CORP0 citations62
US6600595B2Jul 29, 2003
Multi-stage optical amplifier apparatus having fiber grating with a cutoff wavelength less than the pump light wavelength
NEC CORP6 citations62
US12301295B2May 13, 2025
Communication system and method for controlling communication system
NEC CORP0 citations51
US10153850B2Dec 11, 2018
Power feed line switching circuit, branching device, submarine cable system, and power feed line switching method
NEC CORP0 citations51
US11705971B2Jul 18, 2023
Submarine optical communication system and submarine branching apparatus
NEC CORP0 citations43