Tomoaki Takeyama

Person

Yokohama, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Fiber-optic communication apparatus, fiber-optic communication syst...
- Patent number 11,870,553
- Issue date Jan 9, 2024
- Fujitsu Limited
- Makoto Hasegawa
- G02 - OPTICS
Information Patent Grant
Controller and control method for Raman amplifier
- Patent number 11,509,394
- Issue date Nov 22, 2022
- Fujitsu Limited
- Norifumi Shukunami
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Transmission device and transmission system
- Patent number 11,294,258
- Issue date Apr 5, 2022
- Fujitsu Limited
- Tomoaki Takeyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Transmitting apparatus and transmitting method
- Patent number 11,153,014
- Issue date Oct 19, 2021
- Fujitsu Limited
- Masamichi Sugamoto
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmission system, optical transmission apparatus and tra...
- Patent number 11,063,684
- Issue date Jul 13, 2021
- Fujitsu Limited
- Ryo Karube
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Network system, management device, and management method
- Patent number 11,018,763
- Issue date May 25, 2021
- Fujitsu Limited
- Tatsuya Tsuzuki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Transmission apparatus and transmission method
- Patent number 10,972,188
- Issue date Apr 6, 2021
- Fujitsu Limited
- Tomoyuki Kato
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Wavelength conversion apparatus, optical parametric amplifier, tran...
- Patent number 10,782,589
- Issue date Sep 22, 2020
- Fujitsu Limited
- Tomoaki Takeyama
- G02 - OPTICS
Information Patent Grant
Wavelength conversion device, transmission device, and transmission...
- Patent number 10,754,224
- Issue date Aug 25, 2020
- Fujitsu Limited
- Tomoaki Takeyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transfer system, control device, optical transfer method, a...
- Patent number 10,644,823
- Issue date May 5, 2020
- Fujitsu Limited
- Masahiro Yuki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Wavelength converter, wavelength conversion method, and transmissio...
- Patent number 10,634,974
- Issue date Apr 28, 2020
- Fujitsu Limited
- Norifumi Shukunami
- G02 - OPTICS
Information Patent Grant
Optical transmission control device and optical signal wavelength d...
- Patent number 9,991,985
- Issue date Jun 5, 2018
- Fujitsu Limited
- Tatsuya Tsuzuki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical amplifier, optical transmission apparatus, and optical repe...
- Patent number 9,887,778
- Issue date Feb 6, 2018
- Fujitsu Limited
- Yoshito Kachita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical amplifier with loss adjustment unit based on gain
- Patent number 9,520,694
- Issue date Dec 13, 2016
- Fujitsu Limited
- Yoshito Kachita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmission system and optical transmission device
- Patent number 9,509,370
- Issue date Nov 29, 2016
- Fujitsu Limited
- Tomoaki Takeyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Raman fiber amplifier and its control via path switching
- Patent number 9,042,005
- Issue date May 26, 2015
- Fujitsu Limited
- Shinichirou Muro
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Control circuit, control method, and transmission system
- Patent number 9,001,413
- Issue date Apr 7, 2015
- Fujitsu Limited
- Tomoaki Takeyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical amplifying device and optical transmission system
- Patent number 8,922,876
- Issue date Dec 30, 2014
- Fujitsu Limited
- Tomoaki Takeyama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Raman amplifier
- Patent number 8,879,145
- Issue date Nov 4, 2014
- Fujitsu Limited
- Tomoaki Takeyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical amplifier and transmission system
- Patent number 8,854,727
- Issue date Oct 7, 2014
- Fujitsu Limited
- Tomoaki Takeyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical amplifying device, gain control method, optical transmissio...
- Patent number 8,553,318
- Issue date Oct 8, 2013
- Fujitsu Limited
- Tomoaki Takeyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical amplifier
- Patent number 8,498,045
- Issue date Jul 30, 2013
- Fujitsu Limited
- Tomoaki Takeyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical amplifier and optical amplification method
- Patent number 8,390,923
- Issue date Mar 5, 2013
- Fujitsu Limited
- Tomoaki Takeyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical amplifier
- Patent number 8,379,299
- Issue date Feb 19, 2013
- Fujitsu Limited
- Tomoaki Takeyama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Optical amplifier and method for suppressing polarization dependent...
- Patent number 8,363,309
- Issue date Jan 29, 2013
- Fujitsu Limited
- Tomoaki Takeyama
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Optical amplifier
- Patent number 8,351,112
- Issue date Jan 8, 2013
- Fujitsu Limited
- Tomoaki Takeyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical amplifier using delayed phase matching fiber
- Patent number 8,194,309
- Issue date Jun 5, 2012
- Fujitsu Limited
- Takashi Shimizu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmission apparatus and optical attenuation amount contr...
- Patent number 8,116,626
- Issue date Feb 14, 2012
- Fujitsu Limited
- Tomoaki Takeyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical amplifier
- Patent number 8,077,383
- Issue date Dec 13, 2011
- Fujitsu Limited
- Tomoaki Takeyama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Photo-detecting apparatus and photo-detecting method
- Patent number 8,026,538
- Issue date Sep 27, 2011
- Fujitsu Limited
- Tomoaki Takeyama
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
WAVELENGTH CONVERSION DEVICE AND OPTICAL TRANSMISSION SYSTEM
- Publication number 20240106560
- Publication date Mar 28, 2024
- Fujitsu Limited
- Hidenobu MURANAKA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL WAVELENGTH MULTIPLEXING TRANSMISSION DEVICE AND OPTICAL WAV...
- Publication number 20230239050
- Publication date Jul 27, 2023
- Fujitsu Limited
- Shigeru ISHII
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
WAVELENGTH CONVERTER, OPTICAL COMMUNICATION APPARATUS, AND OPTICAL...
- Publication number 20220385373
- Publication date Dec 1, 2022
- Fujitsu Limited
- Hidenobu MURANAKA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
FIBER-OPTIC COMMUNICATION APPARATUS, FIBER-OPTIC COMMUNICATION SYST...
- Publication number 20220368447
- Publication date Nov 17, 2022
- Fujitsu Limited
- Makoto HASEGAWA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CONTROLLER AND CONTROL METHOD FOR RAMAN AMPLIFIER
- Publication number 20220045755
- Publication date Feb 10, 2022
- Fujitsu Limited
- Norifumi Shukunami
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
NETWORK SYSTEM, MANAGEMENT DEVICE, AND MANAGEMENT METHOD
- Publication number 20210067245
- Publication date Mar 4, 2021
- Fujitsu Limited
- Tatsuya Tsuzuki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
TRANSMITTING APPARATUS AND TRANSMITTING METHOD
- Publication number 20200403707
- Publication date Dec 24, 2020
- Fujitsu Limited
- Masamichi Sugamoto
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
TRANSMISSION DEVICE AND TRANSMISSION SYSTEM
- Publication number 20200371292
- Publication date Nov 26, 2020
- Fujitsu Limited
- Tomoaki TAKEYAMA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
TRANSMISSION DEVICE AND TRANSMISSION METHOD
- Publication number 20200059313
- Publication date Feb 20, 2020
- Fujitsu Limited
- Tomoyuki Kato
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL TRANSFER SYSTEM, CONTROL DEVICE, OPTICAL TRANSFER METHOD, A...
- Publication number 20190386767
- Publication date Dec 19, 2019
- Fujitsu Limited
- Masahiro YUKI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
WAVELENGTH CONVERSION DEVICE, TRANSMISSION DEVICE, AND TRANSMISSION...
- Publication number 20190353978
- Publication date Nov 21, 2019
- Fujitsu Limited
- Tomoaki TAKEYAMA
- G02 - OPTICS
Information Patent Application
WAVELENGTH CONVERTER, WAVELENGTH CONVERSION METHOD, AND TRANSMISSIO...
- Publication number 20190353980
- Publication date Nov 21, 2019
- Fujitsu Limited
- Norifumi Shukunami
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
WAVELENGTH CONVERSION APPARATUS, OPTICAL PARAMETRIC AMPLIFIER, TRAN...
- Publication number 20190346738
- Publication date Nov 14, 2019
- Fujitsu Limited
- Tomoaki TAKEYAMA
- G02 - OPTICS
Information Patent Application
TRANSMISSION APPARATUS AND TRANSMISSION METHOD
- Publication number 20190305852
- Publication date Oct 3, 2019
- Fujitsu Limited
- Tomoyuki Kato
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL TRANSMISSION SYSTEM, OPTICAL TRANSMISSION APPARATUS AND TRA...
- Publication number 20190222345
- Publication date Jul 18, 2019
- Fujitsu Limited
- Ryo KARUBE
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL TRANSMISSION CONTROL DEVICE AND OPTICAL SIGNAL WAVELENGTH D...
- Publication number 20170338905
- Publication date Nov 23, 2017
- Fujitsu Limited
- Tatsuya Tsuzuki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL AMPLIFIER, OPTICAL TRANSMISSION APPARATUS, AND OPTICAL REPE...
- Publication number 20160315708
- Publication date Oct 27, 2016
- Fujitsu Limited
- Yoshito Kachita
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
OPTICAL AMPLIFIER
- Publication number 20150280391
- Publication date Oct 1, 2015
- Fujitsu Limited
- Yoshito KACHITA
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
OPTICAL TRANSMISSION SYSTEM AND OPTICAL TRANSMISSION DEVICE
- Publication number 20150125145
- Publication date May 7, 2015
- Fujitsu Limited
- Tomoaki TAKEYAMA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
RAMAN AMPLIFIER
- Publication number 20140146385
- Publication date May 29, 2014
- FUJITSU TELECOM NETWORKS LIMITED
- Tomoaki TAKEYAMA
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
OPTICAL AMPLIFIER AND TRANSMISSION SYSTEM
- Publication number 20140139906
- Publication date May 22, 2014
- Fujitsu Limited
- Tomoaki Takeyama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
AMPLIFYING APPARATUS AND CONTROL METHOD
- Publication number 20130329278
- Publication date Dec 12, 2013
- Fujitsu Limited
- Shinichirou MURO
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
CONTROL CIRCUIT, CONTROL METHOD, AND TRANSMISSION SYSTEM
- Publication number 20130314768
- Publication date Nov 28, 2013
- Fujitsu Limited
- Tomoaki TAKEYAMA
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
OPTICAL AMPLIFYING DEVICE AND OPTICAL TRANSMISSION SYSTEM
- Publication number 20130121689
- Publication date May 16, 2013
- Fujitsu Limited
- Tomoaki TAKEYAMA
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
OPTICAL AMPLIFICATION DEVICE, COMMUNICATION SYSTEM, AND AMPLIFICATI...
- Publication number 20120045212
- Publication date Feb 23, 2012
- FUJITSU LIMITED
- Tomoaki TAKEYAMA
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
OPTICAL AMPLIFYING DEVICE, GAIN CONTROL METHOD, OPTICAL TRANSMISSIO...
- Publication number 20110228381
- Publication date Sep 22, 2011
- Fujitsu Limited
- Tomoaki TAKEYAMA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL AMPLIFIER
- Publication number 20110199672
- Publication date Aug 18, 2011
- Fujitsu Limited
- Tomoaki TAKEYAMA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL AMPLIFIER AND OPTICAL AMPLIFICATION METHOD
- Publication number 20110063721
- Publication date Mar 17, 2011
- FUJITSU LIMITED
- Tomoaki TAKEYAMA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL AMPLIFIER
- Publication number 20110058251
- Publication date Mar 10, 2011
- Fujitsu Limited
- Tomoaki TAKEYAMA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL AMPLIFIER AND METHOD FOR SUPPRESSING POLARIZATION DEPENDENT...
- Publication number 20100315701
- Publication date Dec 16, 2010
- FUJITSU LIMITED
- Tomoaki TAKEYAMA
- G02 - OPTICS

Tomoaki Takeyama

Person

Patents Grantslast 30 patents

Fiber-optic communication apparatus, fiber-optic communication syst...

Controller and control method for Raman amplifier

Transmission device and transmission system

Transmitting apparatus and transmitting method

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

Network system, management device, and management method

Transmission apparatus and transmission method

Wavelength conversion apparatus, optical parametric amplifier, tran...

Wavelength conversion device, transmission device, and transmission...

Optical transfer system, control device, optical transfer method, a...

Wavelength converter, wavelength conversion method, and transmissio...

Optical transmission control device and optical signal wavelength d...

Optical amplifier, optical transmission apparatus, and optical repe...

Optical amplifier with loss adjustment unit based on gain

Optical transmission system and optical transmission device

Raman fiber amplifier and its control via path switching

Control circuit, control method, and transmission system

Optical amplifying device and optical transmission system

Raman amplifier

Optical amplifier and transmission system

Optical amplifying device, gain control method, optical transmissio...

Optical amplifier

Optical amplifier and optical amplification method

Optical amplifier

Optical amplifier and method for suppressing polarization dependent...

Optical amplifier

Optical amplifier using delayed phase matching fiber

Optical transmission apparatus and optical attenuation amount contr...

Optical amplifier

Photo-detecting apparatus and photo-detecting method

Patents Applicationslast 30 patents

WAVELENGTH CONVERSION DEVICE AND OPTICAL TRANSMISSION SYSTEM

OPTICAL WAVELENGTH MULTIPLEXING TRANSMISSION DEVICE AND OPTICAL WAV...

WAVELENGTH CONVERTER, OPTICAL COMMUNICATION APPARATUS, AND OPTICAL...

FIBER-OPTIC COMMUNICATION APPARATUS, FIBER-OPTIC COMMUNICATION SYST...

CONTROLLER AND CONTROL METHOD FOR RAMAN AMPLIFIER

NETWORK SYSTEM, MANAGEMENT DEVICE, AND MANAGEMENT METHOD

TRANSMITTING APPARATUS AND TRANSMITTING METHOD

TRANSMISSION DEVICE AND TRANSMISSION SYSTEM

TRANSMISSION DEVICE AND TRANSMISSION METHOD

OPTICAL TRANSFER SYSTEM, CONTROL DEVICE, OPTICAL TRANSFER METHOD, A...

WAVELENGTH CONVERSION DEVICE, TRANSMISSION DEVICE, AND TRANSMISSION...

WAVELENGTH CONVERTER, WAVELENGTH CONVERSION METHOD, AND TRANSMISSIO...

WAVELENGTH CONVERSION APPARATUS, OPTICAL PARAMETRIC AMPLIFIER, TRAN...

TRANSMISSION APPARATUS AND TRANSMISSION METHOD

OPTICAL TRANSMISSION SYSTEM, OPTICAL TRANSMISSION APPARATUS AND TRA...

OPTICAL TRANSMISSION CONTROL DEVICE AND OPTICAL SIGNAL WAVELENGTH D...

OPTICAL AMPLIFIER, OPTICAL TRANSMISSION APPARATUS, AND OPTICAL REPE...

OPTICAL AMPLIFIER

OPTICAL TRANSMISSION SYSTEM AND OPTICAL TRANSMISSION DEVICE

RAMAN AMPLIFIER

OPTICAL AMPLIFIER AND TRANSMISSION SYSTEM

AMPLIFYING APPARATUS AND CONTROL METHOD

CONTROL CIRCUIT, CONTROL METHOD, AND TRANSMISSION SYSTEM

OPTICAL AMPLIFYING DEVICE AND OPTICAL TRANSMISSION SYSTEM

OPTICAL AMPLIFICATION DEVICE, COMMUNICATION SYSTEM, AND AMPLIFICATI...

OPTICAL AMPLIFYING DEVICE, GAIN CONTROL METHOD, OPTICAL TRANSMISSIO...

OPTICAL AMPLIFIER

OPTICAL AMPLIFIER AND OPTICAL AMPLIFICATION METHOD

OPTICAL AMPLIFIER

OPTICAL AMPLIFIER AND METHOD FOR SUPPRESSING POLARIZATION DEPENDENT...