Inventor

AKIYAMA TOMOYUKI

JP62 patents

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

AKIYAMA TOMOYUKI

FUJITSU LTD

Optical fiber mounted photonic integrated circuit device

Modulated light source

Optical semiconductor device

Control method of optical element

Optical semiconductor device

Optical transmission system

Wavelength-division multiplex optical signal processor and a method of regenerating a wavelength-division multiplexed optical signal

Semiconductor optical amplifier suitable for coarse WDM communications and light amplification method

Optical demultiplexer, optical transport apparatus, and method of controlling optical demultiplexing

Optical transport apparatus, optical demultiplexer, and method of controlling optical demultiplexing

Optical semiconductor element, method of controlling the same and method of manufacturing the same

Optical semiconductor device and optical semiconductor device control method

Optical transmitter for transmitting multilevel optical signals

Optical semiconductor element, method of controlling the same and method of manufacturing the same

Modulated light source

Semiconductor device

Optical repeater

Optical semiconductor device and method for fabricating the same

Bias control of SOA via switches

Wavelength controllable optical device and light control method

Optical AD converter and optical receiver

Optical element

Optical device and optical apparatus

Semiconductor optical device with quantum dots having internal tensile or compressive strain

Optical reception device and optical transmission and reception device

Optical transceiver, optical transceiver device using the same, and method of controlling light source wavelengths

Optical transmitter that transmits multi-level optical signal

Optical communication element and optical neural network

Optical demultiplexer and communication device

Optical demultiplexing device and transmission device

Optical element and optical transmitter

Optical modulator, optical transmitter, and optical communication apparatus

Optical communication component, optical transmitter, and control method

Modulated light source

TOSOH CORP

High purity transparent silica glass

Process for production of pure transparent quartz

Method of producing oxynitride glass

Opaque silica glass article having transparent portion and process for producing same

Secondary battery

RISO KAGAKU CORP

Ink circulation type inkjet printer

Ink circulation type inkjet printer

Inkjet printer

Ink circulation type inkjet printer

Inkjet printer

AKIYAMA TOMOYUKI

Optical semiconductor device

Detachable structure for ink cartridge, and control method for attaching/detaching ink cartridge

Optical semiconductor element having ring modulators

Optical switch, optical demodulator, and optical demodulation method having feedback control of temperature regulator based on optical detector output

Detachable structure for ink cartridge

HEWLETT PACKARD CO

Apparatus for measuring time variant device impedance