Inventor

OGUMA MANABU

JP20 patents

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

OGUMA MANABU

NIPPON TELEGRAPH & TELEPHONE

Optical multi/demultiplexing circuit equipped with phase generating device

Optical multi/demultiplexer

Optical filter

Optical coupling/splitting device, two-way optical propagation device, and optical-transmit-receive system

Interferometer optical switch and variable optical attenuator

Optical multiplexer and optical demultiplexer

Optical 90 degree hybrid circuit

Waveguide-type optical signal processing circuit

Polarization-independent waveguide-type optical interference circuit

Optical multi/demultiplexing circuit

Planar optical waveguide circuit

Optical multiplexer/demultiplexer

Wavelength monitoring device and controlling method thereof

Interposer circuit

Wavelength monitoring circuit

Polarization multiplexed optical transmitter circuit and polarization multi/demultiplexed optical transceiver circuit

KITOH TSUTOMU

Optical wavelength multiplexing/demultiplexing circuit, optical module using optical wavelength multiplexing/demultiplexing circuit, and communication system

Optical wavelength multi/demultiplexer

NASU YUSUKE

Waveguide-type optical interferometer

NTT ELECTRONICS CORP

Optical device manufacturing method and manufacturing apparatus using local etching