Inventor

NAKASHIMA HISAO

JP105 patents

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

NAKASHIMA HISAO

FUJITSU LTD

Differential quadrature phase-shift modulator and method for setting driving voltage thereof

Transmission apparatus, transmission system, and transmission control method

Polarization state detector, optical transmitter, and optical receiver

Distortion compensator, optical receiver, distortion compensator and optical receiver controlling methods, and optical transmission system

Repeater and repeating method

Multi-level modulation receiving device

Analog-to-digital conversion controller, optical receiving device, optical receiving method, and waveform-distortion compensating device

Wavelength division multiplexing optical transmission system and transmission wavelength control method therefor

Optical apparatus with loss compensation capability and optical amplifier for loss compensation

Network designing device and computer-readable medium

Receiving device and phase-error compensation method

Optical transmitter and control method of optical transmitter

Optical transmitter, optical receiver, method of compensating non-linear distortion, and communication apparatus

Optical transmitter and waveform distortion correction method

Optical transmission system and optical transmission method

Optical transmission system, optical transmission apparatus, signal conditioning program, and signal conditioning method

Optical transmission system, method of adjusting optical transmission device, and non-transitory computer-readable medium

Light receiving device and light receiving method

Optical transmission system and optical transmission method

Imbalance compensation device, transmission device, and imbalance compensation method

Network controller and signal quality estimating method

Transmission apparatus, reception apparatus and modulation method

Estimating device and method for estimating

NAKASHIMA HISAO

Signal processing circuit, optical receiver, detector and method for compensating for waveform distortion

Optical transmitter and optical transmitter unit

Optical communication system and optical receiver

Optical receiver and optical receiving method

Digital coherent optical receiver

Optical receiver

Digital coherent receiver and receiving method

HITACHI LTD

Phase-locked semiconductor laser device

Light emitting device with disordered region

Semiconductor laser

Phase-locked semiconductor laser device

ODA SHOICHIRO

Optical receiver and method for optical reception

Optical receiver for controlling wavelength of local oscillation light and local oscillation light control method

Method for electric power supply of optical receiver, digital signal processing circuit, and optical receiver

TANIMURA TAKAHITO

Polarization multiplexing and transmitting apparatus

Distortion compensator, optical receiver, distortion compensator and optical receiver controlling methods, and optical transmission system

Distortion compensating apparatus, optical receiving apparatus, and optical transmitting and receiving system

KOIZUMI NOBUKAZU

Digital coherent receiving apparatus

Adaptive equalizer, optical receiver, and tap coefficient correcting method

TANAKA TOSHIKI

Optical transmitter

Optical transmitter, optical transmission method, and wavelength-selective variable delayer

NISHIHARA MASATO

Delay processing apparatus, signal amplification apparatus, opto-electric conversion apparatus, analog-digital conversion apparatus, receiving apparatus, and receiving method

LI LEI

Optical coherent receiver, frequency offset estimating apparatus and method for optical coherent receiver

ZHANG HUIJIAN

Apparatus and method for frequency offset monitoring used in digital coherent optical receiver

TAKEUCHI OSAMU

Optical transmission apparatus and method

KIBUN KK

Method of producing fibrous fish paste

KOMAKI KOSUKE

Digital coherent receiver and phase control method