Inventor
KUWAHARA SHOICHIRO
JP13 patents
⚠️ This page may combine multiple inventors who share the name “KUWAHARA SHOICHIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NIPPON TELEGRAPH & TELEPHONE
11 patentsUS7536108B2May 19, 2009
High precision chromatic dispersion measuring method and automatic dispersion compensating optical link system that uses this method
NIPPON TELEGRAPH & TELEPHONE30 citations92
US7116917B2Oct 3, 2006
Optical transmitter and optical transmission system
NIPPON TELEGRAPH & TELEPHONE32 citations92
US11397363B2Jul 26, 2022
Automatic bias control circuit
NIPPON TELEGRAPH & TELEPHONE9 citations85
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
US10823989B2Nov 3, 2020
Bias control circuit and bias control method
NIPPON TELEGRAPH & TELEPHONE4 citations72
US10313015B2Jun 4, 2019
Optical transmitter and bias voltage control method
NIPPON TELEGRAPH & TELEPHONE6 citations72
US11711198B2Jul 25, 2023
Synchronous detection apparatus, synchronous detection method, and program
NIPPON TELEGRAPH & TELEPHONE0 citations62
US12372721B2Jul 29, 2025
Depolarizer and optical amplifier excitation apparatus
NIPPON TELEGRAPH & TELEPHONE0 citations51
US11822161B2Nov 21, 2023
Bias voltage adjustment apparatus and IQ optical modulation system
NIPPON TELEGRAPH & TELEPHONE0 citations51
US11711151B2Jul 25, 2023
Optical transmission system and compensation method
NIPPON TELEGRAPH & TELEPHONE0 citations50