Inventor
ARAYA KATSUHIRO
JP13 patents
Patents
13 patentsUS7127168B2Oct 24, 2006
Multi-wavelength optical modulation circuit and wavelength-division multiplexed optical signal transmitter
NIPPON TELEGRAPH & TELEPHONE31 citations92
US7068412B2Jun 27, 2006
Multi-wavelength generating method and apparatus based on flattening of optical spectrum
NIPPON TELEGRAPH & TELEPHONE9 citations73
US6924924B2Aug 2, 2005
Multi-wavelength generating method and apparatus based on flattening of optical spectrum
NIPPON TELEGRAPH & TELEPHONE9 citations73
US6831774B2Dec 14, 2004
Multi-wavelength generating method and apparatus based on flattening of optical spectrum
NIPPON TELEGRAPH & TELEPHONE8 citations73
US11265628B2Mar 1, 2022
Optical transmission system and optical transmission method
NIPPON TELEGRAPH & TELEPHONE2 citations72
US12326785B2Jun 10, 2025
Transmission side transmission device and redundancy method of transmission side transmission device
NIPPON TELEGRAPH & TELEPHONE0 citations57
US12038813B2Jul 16, 2024
Transmitting side transmission device, receiving side transmission device, redundancy method of transmitting side transmission device, redundancy method of receiving side transmission device, program, and transmission device
NIPPON TELEGRAPH & TELEPHONE0 citations57
US11588720B2Feb 21, 2023
Network device and network test method
NIPPON TELEGRAPH & TELEPHONE0 citations53
US11362894B2Jun 14, 2022
Wiring management system and wiring management method
NIPPON TELEGRAPH & TELEPHONE0 citations51
US11251877B2Feb 15, 2022
Optical reception device
NIPPON TELEGRAPH & TELEPHONE0 citations51
US11812205B2Nov 7, 2023
Optical cross-connect device, optical transmission system, and optical transmission line connection error detection method
NIPPON TELEGRAPH & TELEPHONE0 citations49
US11750535B2Sep 5, 2023
Transmitting device, receiving device, packet transfer system,packet transfer method, and packet transfer program
NIPPON TELEGRAPH & TELEPHONE0 citations48
US11696056B2Jul 4, 2023
Optical transmission system and optical transmission method
NIPPON TELEGRAPH & TELEPHONE0 citations48