Shoichiro Kuwahara

Person

Yokosuka-shi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Bias voltage adjustment apparatus and IQ optical modulation system
- Patent number 11,822,161
- Issue date Nov 21, 2023
- Nippon Telegraph and Telephone Corporation
- Hiroto Kawakami
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Synchronous detection apparatus, synchronous detection method, and...
- Patent number 11,711,198
- Issue date Jul 25, 2023
- Nippon Telegraph and Telephone Corporation
- Hiroto Kawakami
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmission system and compensation method
- Patent number 11,711,151
- Issue date Jul 25, 2023
- Nippon Telegraph and Telephone Corporation
- Asuka Matsushita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Automatic bias control circuit
- Patent number 11,397,363
- Issue date Jul 26, 2022
- Nippon Telegraph and Telephone Corporation
- Hiroto Kawakami
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Bias control circuit and bias control method
- Patent number 10,823,989
- Issue date Nov 3, 2020
- Nippon Telegraph and Telephone Corporation
- Hiroto Kawakami
- G02 - OPTICS
Information Patent Grant
Optical transmitter and bias voltage control method
- Patent number 10,313,015
- Issue date Jun 4, 2019
- Nippon Telegraph and Telephone Corporation
- Hiroto Kawakami
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmission system, optical transmitter for optical transm...
- Patent number 8,005,374
- Issue date Aug 23, 2011
- Nippon Telegraph and Telephone Corporation
- Kazushige Yonenaga
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical receiver using Mach-Zehnder interferometer
- Patent number 7,995,930
- Issue date Aug 9, 2011
- NTT Electronics Corporation
- Mikio Yoneyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmission system, optical transmitter for optical transm...
- Patent number 7,734,194
- Issue date Jun 8, 2010
- Nippon Telegraph and Telephone Corporation
- Kazushige Yonenaga
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
High precision chromatic dispersion measuring method and automatic...
- Patent number 7,536,108
- Issue date May 19, 2009
- Nippon Telegraph and Telephone Corporation
- Akira Hirano
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmitter and optical transmission system
- Patent number 7,116,917
- Issue date Oct 3, 2006
- Nippon Telegraph and Telephone Coproration
- Yutaka Miyamoto
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
CONTROL CIRCUIT AND OPTICAL CIRCUIT CONTROL METHOD
- Publication number 20250028217
- Publication date Jan 23, 2025
- Nippon Telegraph and Telephone Corporation
- Hiroto KAWAKAMI
- G02 - OPTICS
Information Patent Application
Distributed Optical Amplifier, Distributed Optical Amplifier System...
- Publication number 20240258760
- Publication date Aug 1, 2024
- Nippon Telegraph and Telephone Corporation
- Hiroto KAWAKAMI
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
EXCITATION DEVICE FOR OPTICAL AMPLIFIER
- Publication number 20240039233
- Publication date Feb 1, 2024
- Nippon Telegraph and Telephone Corporation
- Hiroto KAWAKAMI
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
DEPOLARIZER AND OPTICAL AMPLIFIER EXCITATION APPARATUS
- Publication number 20240004132
- Publication date Jan 4, 2024
- Nippon Telegraph and Telephone Corporation
- Hiroto KAWAKAMI
- G02 - OPTICS
Information Patent Application
BIAS VOLTAGE ADJUSTMENT APPARATUS AND IQ OPTICAL MODULATION SYSTEM
- Publication number 20230004027
- Publication date Jan 5, 2023
- Nippon Telegraph and Telephone Corporation
- Hiroto KAWAKAMI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
SYNCHRONOUS DETECTION APPARATUS, SYNCHRONOUS DETECTION METHOD, AND...
- Publication number 20220263645
- Publication date Aug 18, 2022
- Nippon Telegraph and Telephone Corporation
- Hiroto KAWAKAMI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL TRANSMISSION SYSTEM AND COMPENSATION METHOD
- Publication number 20220216923
- Publication date Jul 7, 2022
- Nippon Telegraph and Telephone Corporation
- Asuka MATSUSHITA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
AUTOMATIC BIAS CONTROL CIRCUIT
- Publication number 20220043320
- Publication date Feb 10, 2022
- Nippon Telegraph and Telephone Corporation
- Hiroto KAWAKAMI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
BIAS CONTROL CIRCUIT AND BIAS CONTROL METHOD
- Publication number 20200133035
- Publication date Apr 30, 2020
- Nippon Telegraph and Telephone Corporation
- Hiroto KAWAKAMI
- G02 - OPTICS
Information Patent Application
OPTICAL TRANSMITTER AND BIAS VOLTAGE CONTROL METHOD
- Publication number 20180323878
- Publication date Nov 8, 2018
- Nippon Telegraph and Telephone Corporation
- Hiroto KAWAKAMI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical Transmission System, Optical Transmitter for Optical Transm...
- Publication number 20100172653
- Publication date Jul 8, 2010
- Nippon Telegraph and Telephone Corporation
- Kazushige Yonenaga
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL RECEIVER USING MACH-ZEHNDER INTERFEROMETER
- Publication number 20090097867
- Publication date Apr 16, 2009
- Mikio Yoneyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Polarization mode dispersion compensation method and polarization m...
- Publication number 20040131363
- Publication date Jul 8, 2004
- Yoshiaki Kisaka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical transmitter and optical transmission system
- Publication number 20030002121
- Publication date Jan 2, 2003
- Nippon Telegraph and Telephone Corporation
- Yutaka Miyamoto
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
High precision chromatic dispersion measuring method and automatic...
- Publication number 20030002112
- Publication date Jan 2, 2003
- Nippon Telegraph and Telephone Corporation
- Akira Hirano
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Shoichiro Kuwahara

Person

Patents Grantslast 30 patents

Bias voltage adjustment apparatus and IQ optical modulation system

Synchronous detection apparatus, synchronous detection method, and...

Optical transmission system and compensation method

Automatic bias control circuit

Bias control circuit and bias control method

Optical transmitter and bias voltage control method

Optical transmission system, optical transmitter for optical transm...

Optical receiver using Mach-Zehnder interferometer

Optical transmission system, optical transmitter for optical transm...

High precision chromatic dispersion measuring method and automatic...

Optical transmitter and optical transmission system

Patents Applicationslast 30 patents

CONTROL CIRCUIT AND OPTICAL CIRCUIT CONTROL METHOD

Distributed Optical Amplifier, Distributed Optical Amplifier System...

EXCITATION DEVICE FOR OPTICAL AMPLIFIER

DEPOLARIZER AND OPTICAL AMPLIFIER EXCITATION APPARATUS

BIAS VOLTAGE ADJUSTMENT APPARATUS AND IQ OPTICAL MODULATION SYSTEM

SYNCHRONOUS DETECTION APPARATUS, SYNCHRONOUS DETECTION METHOD, AND...

OPTICAL TRANSMISSION SYSTEM AND COMPENSATION METHOD

AUTOMATIC BIAS CONTROL CIRCUIT

BIAS CONTROL CIRCUIT AND BIAS CONTROL METHOD

OPTICAL TRANSMITTER AND BIAS VOLTAGE CONTROL METHOD

Optical Transmission System, Optical Transmitter for Optical Transm...

OPTICAL RECEIVER USING MACH-ZEHNDER INTERFEROMETER

Polarization mode dispersion compensation method and polarization m...

Optical transmitter and optical transmission system

High precision chromatic dispersion measuring method and automatic...