Inventor
KATAOKA TOMOYOSHI
JP11 patents
Patents
11 patentsUS9621299B2Apr 11, 2017
Coherent communication system, communication method, and transmission method
NIPPON TELEGRAPH & TELEPHONE15 citations84
US8005374B2Aug 23, 2011
Optical transmission system, optical transmitter for optical transmission system, and optical receiver for optical transmission system
NIPPON TELEGRAPH & TELEPHONE10 citations83
US7734194B2Jun 8, 2010
Optical transmission system, optical transmitter for optical transmission system, and optical receiver for optical transmission system
NIPPON TELEGRAPH & TELEPHONE16 citations83
US6983085B2Jan 3, 2006
Optical transmission circuit
NIPPON TELEGRAPH & TELEPHONE12 citations82
US10090921B2Oct 2, 2018
Light modulation device and light modulation method
NIPPON TELEGRAPH & TELEPHONE7 citations81
US10171173B2Jan 1, 2019
Optical signal transmission apparatus and optical signal transmission method
NIPPON TELEGRAPH & TELEPHONE2 citations73
US10038507B2Jul 31, 2018
Optical transmission system, phase compensation method, and optical reception apparatus
NIPPON TELEGRAPH & TELEPHONE3 citations72
US10243664B2Mar 26, 2019
Optical modulator driver circuit and optical transmitter
NIPPON TELEGRAPH & TELEPHONE5 citations71
US9294826B2Mar 22, 2016
Wavelength selection switch system and method for controlling wavelength selection switch
NIPPON TELEGRAPH & TELEPHONE1 citations48
US10122462B2Nov 6, 2018
Transport apparatus and transport method
NIPPON TELEGRAPH & TELEPHONE0 citations41
US9667350B2May 30, 2017
Optical receiving device and phase cycle reduction method
NIPPON TELEGRAPH & TELEPHONE0 citations41