Inventor

IWATSUKI KATSUMI

JP24 patents

⚠️ This page may combine multiple inventors who share the name “IWATSUKI KATSUMI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

IWATSUKI KATSUMI

NIPPON TELEGRAPH & TELEPHONE

Optical wavelength multiplexing access system

Optical modulation apparatus

Optical wavelength-division multiple access system and optical network unit

Optical network unit, wavelength splitter, and optical wavelength-division multiplexing access system

Node apparatus, optical wavelength division multiplexing network, and system switching method

Multi-wavelength optical modulation circuit and wavelength-division multiplexed optical signal transmitter

Polarization scrambler and optical network using the same

Polarization scrambler and optical network using the same

Optical fiber transmission line, optical fiber transmission system and production method thereof, and optical fiber combining method

Method for measuring distribution of zero dispersion wavelengths in an optical fiber and apparatus therefor

Optical communication system, optical communication unit, and optical transceiving package

Node apparatus, optical wavelength division multiplexing network, and system switching method

Optical module and method for monitoring and controlling wavelengths

Optical wavelength division multiplexing access system

Optical transmission line and optical transmission system

Polarization scrambler and optical network using the same

Ring network using multi-wavelength generator

Optical modulating device

Optical communication light source unit and wavelength monitoring control method

Low-cost optical burst transmission system, apparatus, and method

UNIV TOHOKU

Power and communications network convergence system, and control method therein

Network system and configuration method of network architecture

Network system and control method of network system

Power system