Hirotomo Izumi

Person

Kawasaki, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Mach-zehnder optical modulator
- Patent number 10,890,822
- Issue date Jan 12, 2021
- Fujitsu Limited
- Shigeki Kawaai
- G02 - OPTICS
Information Patent Grant
Chromatic dispersion compensation device and method
- Patent number 7,357,521
- Issue date Apr 15, 2008
- Fujitsu Limited
- Hirotomo Izumi
- G02 - OPTICS
Information Patent Grant
Spectroscopic apparatus
- Patent number 7,304,798
- Issue date Dec 4, 2007
- Fujitsu Limited
- Hirotomo Izumi
- G01 - MEASURING TESTING
Information Patent Grant
Optical apparatus provided with demultiplexing function
- Patent number 7,171,084
- Issue date Jan 30, 2007
- Fujitsu Limited
- Hirotomo Izumi
- G02 - OPTICS
Information Patent Grant
Transmission wavelength characteristics variable optical element, a...
- Patent number 7,016,096
- Issue date Mar 21, 2006
- Fujitsu Limited
- Hirotomo Izumi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Optical apparatus and device
- Patent number 6,900,940
- Issue date May 31, 2005
- Fujitsu Limited
- Nobuaki Mitamura
- G02 - OPTICS
Information Patent Grant
TRANSMISSION WAVELENGTH CHARACTERISTICS VARIABLE OPTICAL ELEMENT, A...
- Patent number 6,862,126
- Issue date Mar 1, 2005
- Fujitsu Limited
- Takashi Ishiwada
- G02 - OPTICS
Information Patent Grant
Wavelength dispersion compensation system for compensating even for...
- Patent number 6,836,580
- Issue date Dec 28, 2004
- Fujitsu Limited
- Hirotomo Izumi
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
WAVELENGTH TUNABLE LASER DEVICE
- Publication number 20230238774
- Publication date Jul 27, 2023
- FUJITSU OPTICAL COMPONENTS LIMITED
- Hirotomo IZUMI
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
WAVELENGTH FILTER AND LASER APPARATUS
- Publication number 20230035193
- Publication date Feb 2, 2023
- FUJITSU OPTICAL COMPONENTS LIMITED
- Yukie Iga
- G02 - OPTICS
Information Patent Application
RECEIVING DEVICE AND RECEIVING METHOD
- Publication number 20210257982
- Publication date Aug 19, 2021
- Fujitsu Limited
- DAISUKE USUI
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
OPTICAL MODULATOR AND OPTICAL MODULE
- Publication number 20200218097
- Publication date Jul 9, 2020
- Fujitsu Limited
- Hirotomo Izumi
- G02 - OPTICS
Information Patent Application
MACH-ZEHNDER OPTICAL MODULATOR
- Publication number 20200089075
- Publication date Mar 19, 2020
- Fujitsu Limited
- Shigeki Kawaai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL MODULATOR
- Publication number 20190326996
- Publication date Oct 24, 2019
- Fujitsu Limited
- Hirotomo Izumi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
LASER DIODE CONTROL CIRCUIT AND OPTICAL COMMUNICATION APPARATUS
- Publication number 20190115721
- Publication date Apr 18, 2019
- Fujitsu Limited
- Hirotomo Izumi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
OPTICAL ISOLATOR AND OPTICAL MODULE
- Publication number 20180267245
- Publication date Sep 20, 2018
- Fujitsu Limited
- Hirotomo Izumi
- G02 - OPTICS
Information Patent Application
COMPUTING METHOD AND COMPUTING DEVICE
- Publication number 20160223598
- Publication date Aug 4, 2016
- Fujitsu Limited
- Kai Nojima
- G01 - MEASURING TESTING
Information Patent Application
ELECTROMAGNETIC FIELD SIMULATION METHOD AND ELECTROMAGNETIC FIELD S...
- Publication number 20150324498
- Publication date Nov 12, 2015
- Fujitsu Limited
- Hirotomo IZUMI
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Chirp measuring device and chirp measurement method
- Publication number 20110158640
- Publication date Jun 30, 2011
- FUJITSU OPTICAL COMPONENTS LIMITED
- Hirotomo Izumi
- G01 - MEASURING TESTING
Information Patent Application
Optical module and dispersion compensator
- Publication number 20090317085
- Publication date Dec 24, 2009
- FUJITSU LIMITED
- Hirotomo Izumi
- G02 - OPTICS
Information Patent Application
Chromatic dispersion compensation device and method
- Publication number 20080304157
- Publication date Dec 11, 2008
- FUJITSU LIMITED
- Hirotomo Izumi
- G02 - OPTICS
Information Patent Application
Optical transmitter/receiver module
- Publication number 20080240717
- Publication date Oct 2, 2008
- FUJITSU LIMITED
- Hirotomo Izumi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Spectral apparatus and wavelength dispersion control apparatus
- Publication number 20070285783
- Publication date Dec 13, 2007
- FUJITSU LIMITED
- Hirotomo Izumi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Computer program, apparatus, and method for analyzing electromagnet...
- Publication number 20070233405
- Publication date Oct 4, 2007
- FUJITSU LIMITED
- Hirotomo Izumi
- G01 - MEASURING TESTING
Information Patent Application
Variable dispersion compensator
- Publication number 20060285849
- Publication date Dec 21, 2006
- FUJITSU LIMITED
- Hirotomo Izumi
- G02 - OPTICS
Information Patent Application
Optical apparatus provided with demultiplexing function
- Publication number 20050194514
- Publication date Sep 8, 2005
- FUJITSU LIMITED
- Hirotomo Izumi
- G02 - OPTICS
Information Patent Application
Wavelength characteristic variable filter, optical amplifier, and o...
- Publication number 20050094272
- Publication date May 5, 2005
- FUJITSU LIMITED
- Norihisa Naganuma
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Spectroscopic apparatus
- Publication number 20050046837
- Publication date Mar 3, 2005
- FUJITSU LIMITED
- Hirotomo Izumi
- G02 - OPTICS
Information Patent Application
Chromatic dispersion compensation device and method
- Publication number 20040184724
- Publication date Sep 23, 2004
- FUJITSU LIMITED
- Hirotomo Izumi
- G02 - OPTICS
Information Patent Application
Transmission wavelength characteristics variable optical element, a...
- Publication number 20030218796
- Publication date Nov 27, 2003
- FUJITSU LIMITED
- Hirotomo Izumi
- G02 - OPTICS
Information Patent Application
Transmission wavelength characteristics variable optical element, a...
- Publication number 20030174381
- Publication date Sep 18, 2003
- FUJITSU LIMITED
- Takashi Ishiwada
- G02 - OPTICS
Information Patent Application
Optical device
- Publication number 20030128431
- Publication date Jul 10, 2003
- Nobuaki Mitamura
- G02 - OPTICS
Information Patent Application
Wavelength dispersion compensation system for compensating even for...
- Publication number 20030053737
- Publication date Mar 20, 2003
- FUJITSU LIMITED
- Hirotomo Izumi
- G02 - OPTICS

Hirotomo Izumi

Person

Patents Grantslast 30 patents

Mach-zehnder optical modulator

Chromatic dispersion compensation device and method

Spectroscopic apparatus

Optical apparatus provided with demultiplexing function

Transmission wavelength characteristics variable optical element, a...

Optical apparatus and device

TRANSMISSION WAVELENGTH CHARACTERISTICS VARIABLE OPTICAL ELEMENT, A...

Wavelength dispersion compensation system for compensating even for...

Patents Applicationslast 30 patents

WAVELENGTH TUNABLE LASER DEVICE

WAVELENGTH FILTER AND LASER APPARATUS

RECEIVING DEVICE AND RECEIVING METHOD

OPTICAL MODULATOR AND OPTICAL MODULE

MACH-ZEHNDER OPTICAL MODULATOR

OPTICAL MODULATOR

LASER DIODE CONTROL CIRCUIT AND OPTICAL COMMUNICATION APPARATUS

OPTICAL ISOLATOR AND OPTICAL MODULE

COMPUTING METHOD AND COMPUTING DEVICE

ELECTROMAGNETIC FIELD SIMULATION METHOD AND ELECTROMAGNETIC FIELD S...

Chirp measuring device and chirp measurement method

Optical module and dispersion compensator

Chromatic dispersion compensation device and method

Optical transmitter/receiver module

Spectral apparatus and wavelength dispersion control apparatus

Computer program, apparatus, and method for analyzing electromagnet...

Variable dispersion compensator

Optical apparatus provided with demultiplexing function

Wavelength characteristic variable filter, optical amplifier, and o...

Spectroscopic apparatus

Chromatic dispersion compensation device and method

Transmission wavelength characteristics variable optical element, a...

Transmission wavelength characteristics variable optical element, a...

Optical device

Wavelength dispersion compensation system for compensating even for...