Inventor

AKIBA SHIGEYUKI

JP83 patents

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

AKIBA SHIGEYUKI

KOKUSAI DENSHIN DENWA CO LTD

Optical transmission device, WDM optical transmission apparatus, and optical transmission system using return-to-zero optical pulses

WDM optical communication method with pre-emphasis technique and an apparatus therefor

Optical communication system and optical transmitting device

Integrated semiconductor light emitting element with oscillation wavelength and phase modulated light output

Optical add-drop multiplexer

Soliton optical communication system and optical transmitter and optical receiver therefor

Wavelength division multiplexed optical fiber transmission equipment

Wavelength division multiplexed optical fiber transmission equiptment

Method for manufacturing diffraction grating

Optical power measuring system terminal station and repeater therefor

Wavelength-division multiplexing optical transmission system

Optical switch with reduced polarization dependency and no waveform deformation and frequency shift

Optical transmitting terminal

Laser light generator

Apparatus for measuring optical transmission characteristic

Optical transmitter with the signal light of reduced degree of polarization and optical depolarizing circuit

Method for the manufacture of optical semiconductor device

Variable-waveguide optical branching filter

Multi-layered semi-conductor photodetector

Distributed feedback semiconductor laser with monitor

Semiconductor laser

Wavelength division multiplexed optical processing device and optical communication transmission path

Gain equalizing apparatus

Optical add-drop multiplexer

Method and device for optical add/drop multiplexing using high speed polarization scrambler

Optical transmission line

Optical pulse generator

Optical modulator, optical short pulse generating device, optical waveform shaping device, and optical demultiplexer device

Gain-controllable optical amplifier and optical gain-control method

Optical transmission system

Optical amplifying-repeating transmission system

Optical amplifying transmitting system

Distributed feedback semiconductor laser device and current injection

Method for manufacturing semiconductor optical integrated device with optical waveguide regions

Semiconductor integrated light emitting device

Semiconductor device with distributed bragg reflector

Optical transmission system and optical repeater

Optically amplifying transmission system

Optical receiver device for dark soliton lightwave

Quantum well structure and semiconductor device using the same

Optical external modulation semiconductor element

Avalanche photo diode with quantum well layer

Distributed feedback semiconductor laser

Semiconductor laser with buffer layer

Gain equalizer and optical amplifying transmission line

KDD CORP

Control signal superimposer

Optical repeater monitoring system and a method thereof

Optical amplifying transmission system and optical amplifying repeater

KUKUSAI DENSHIN DENWA KABUSHIK

Line monitoring method and line monitoring apparatus

KUKUSAI DENSHIN DENWA KK

Light emitting device