Hiroto KAWAKAMI

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 transmitter and method for controller optical transmitter
- Patent number 11,646,800
- Issue date May 9, 2023
- Nippon Telegraph and Telephone Corporation
- Shogo Yamanaka
- G02 - OPTICS
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
Optical modulator
- Patent number 11,194,219
- Issue date Dec 7, 2021
- Nippon Telegraph and Telephone Corporation
- Hiroto Kawakami
- G02 - OPTICS
Information Patent Grant
Optical transmitter
- Patent number 11,159,242
- Issue date Oct 26, 2021
- 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 transmission system, optical transmission apparatus, and op...
- Patent number 10,536,238
- Issue date Jan 14, 2020
- Nippon Telegraph and Telephone Corporation
- Kohki Shibahara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
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 modulator driver circuit and optical transmitter
- Patent number 10,243,664
- Issue date Mar 26, 2019
- Nippon Telegraph and Telephone Corporation
- Munehiko Nagatani
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Light modulation device and light modulation method
- Patent number 10,090,921
- Issue date Oct 2, 2018
- Nippon Telegraph and Telephone Corporation
- Mikio Yoneyama
- G02 - OPTICS
Information Patent Grant
Optical modulation device and bias voltage control method
- Patent number 9,116,368
- Issue date Aug 25, 2015
- Nippon Telegraph and Telephone Corporation
- Hiroto Kawakami
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical signal transmitter, and bias voltage control method
- Patent number 9,020,361
- Issue date Apr 28, 2015
- Nippon Telegraph and Telephone Corporation
- Hiroto Kawakami
- 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 fiber communication system using remote pumping
- Patent number 7,379,236
- Issue date May 27, 2008
- Nippon Telegraph and Telephone Corporation
- Hiroji Masuda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmission system with group velocity dispersion compensa...
- Patent number 6,263,139
- Issue date Jul 17, 2001
- Nippon Telegraph and Telephone Corporation
- Hiroto Kawakami
- G02 - OPTICS
Information Patent Grant
Sodium cooled fast reactor
- Patent number 5,265,136
- Issue date Nov 23, 1993
- Kabushiki Kaisha Toshiba
- Hiroshi Yamazaki
- G21 - NUCLEAR PHYSICS NUCLEAR ENGINEERING

Patents Applicationslast 30 patents

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
OPTICAL TRANSMITTER
- Publication number 20230261755
- Publication date Aug 17, 2023
- Nippon Telegraph and Telephone Corporation
- Hiroto KAWAKAMI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
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 Transmitter and Method for Controller Optical Transmitter
- Publication number 20220116116
- Publication date Apr 14, 2022
- Nippon Telegraph and Telephone Corporation
- Shogo Yamanaka
- 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
OPTICAL TRANSMITTER
- Publication number 20210194594
- Publication date Jun 24, 2021
- Nippon Telegraph and Telephone Corporation
- Hiroto KAWAKAMI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL MODULATOR
- Publication number 20210096440
- Publication date Apr 1, 2021
- Nippon Telegraph and Telephone Corporation
- Hiroto KAWAKAMI
- G02 - OPTICS
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 TRANSMISSION SYSTEM, OPTICAL TRANSMISSION APPARATUS, AND OP...
- Publication number 20180375607
- Publication date Dec 27, 2018
- Nippon Telegraph and Telephone Corporation
- Kohki SHIBAHARA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
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
LIGHT MODULATION DEVICE AND LIGHT MODULATION METHOD
- Publication number 20170117961
- Publication date Apr 27, 2017
- Nippon Telegraph and Telephone Corporation
- Mikio YONEYAMA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical Modulator Driver Circuit and Optical Transmitter
- Publication number 20160087727
- Publication date Mar 24, 2016
- Nippon Telegraph and Telephone Corporation
- Munehiko Nagatani
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL MODULATION DEVICE AND BIAS VOLTAGE CONTROL METHOD
- Publication number 20140153077
- Publication date Jun 5, 2014
- Nippon Telegraph and Telephone Corporation
- Hiroto Kawakami
- G02 - OPTICS
Information Patent Application
OPTICAL SIGNAL TRANSMITTER, AND BIAS VOLTAGE CONTROL METHOD
- Publication number 20120155865
- Publication date Jun 21, 2012
- NTT ELECTRONICS CORPORATION
- Hiroto Kawakami
- 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
Optical fiber communication system using remote pumping
- Publication number 20070003286
- Publication date Jan 4, 2007
- Nippon Telegraph and Telephone Corporation
- Hiroji Masuda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Hiroto KAWAKAMI

Person

Patents Grantslast 30 patents

Bias voltage adjustment apparatus and IQ optical modulation system

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

Optical transmitter and method for controller optical transmitter

Automatic bias control circuit

Optical modulator

Optical transmitter

Bias control circuit and bias control method

Optical transmission system, optical transmission apparatus, and op...

Optical transmitter and bias voltage control method

Optical modulator driver circuit and optical transmitter

Light modulation device and light modulation method

Optical modulation device and bias voltage control method

Optical signal transmitter, and bias voltage control method

Optical receiver using Mach-Zehnder interferometer

Optical fiber communication system using remote pumping

Optical transmission system with group velocity dispersion compensa...

Sodium cooled fast reactor

Patents Applicationslast 30 patents

Distributed Optical Amplifier, Distributed Optical Amplifier System...

EXCITATION DEVICE FOR OPTICAL AMPLIFIER

DEPOLARIZER AND OPTICAL AMPLIFIER EXCITATION APPARATUS

OPTICAL TRANSMITTER

BIAS VOLTAGE ADJUSTMENT APPARATUS AND IQ OPTICAL MODULATION SYSTEM

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

Optical Transmitter and Method for Controller Optical Transmitter

AUTOMATIC BIAS CONTROL CIRCUIT

OPTICAL TRANSMITTER

OPTICAL MODULATOR

BIAS CONTROL CIRCUIT AND BIAS CONTROL METHOD

OPTICAL TRANSMISSION SYSTEM, OPTICAL TRANSMISSION APPARATUS, AND OP...

OPTICAL TRANSMITTER AND BIAS VOLTAGE CONTROL METHOD

LIGHT MODULATION DEVICE AND LIGHT MODULATION METHOD

Optical Modulator Driver Circuit and Optical Transmitter

OPTICAL MODULATION DEVICE AND BIAS VOLTAGE CONTROL METHOD

OPTICAL SIGNAL TRANSMITTER, AND BIAS VOLTAGE CONTROL METHOD

OPTICAL RECEIVER USING MACH-ZEHNDER INTERFEROMETER

Optical fiber communication system using remote pumping