HIROHITO YAMADA

Person

Miyagi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Composite optical waveguide, variable-wavelength laser, and method...
- Patent number 8,494,023
- Issue date Jul 23, 2013
- NEC Corporation
- Hiroyuki Yamazaki
- G02 - OPTICS
Information Patent Grant
Optical waveguide
- Patent number 8,374,469
- Issue date Feb 12, 2013
- NEC Corporation
- Hirohito Yamada
- G02 - OPTICS
Information Patent Grant
Photonic crystal optical circuit and method for controlling the same
- Patent number 7,715,665
- Issue date May 11, 2010
- NEC Corporation
- Jun Ushida
- G02 - OPTICS
Information Patent Grant
Waveguide structure and method of manufacturing the same
- Patent number 7,376,317
- Issue date May 20, 2008
- NEC Corporation
- Hirohito Yamada
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Photonic crystal optical circuit and method for controlling the same
- Patent number 7,359,606
- Issue date Apr 15, 2008
- NEC Corporation
- Jun Ushida
- G02 - OPTICS
Information Patent Grant
White light pulse generating method using nonlinear optical device
- Patent number 7,286,738
- Issue date Oct 23, 2007
- NEC Corporation
- Hirohito Yamada
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Photonic crystal waveguide and directional coupler using the same
- Patent number 6,631,236
- Issue date Oct 7, 2003
- NEC Corporation
- Hirohito Yamada
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Optical measurement of target-light waveform
- Patent number 6,541,951
- Issue date Apr 1, 2003
- NEC Corporation
- Masayuki Shirane
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Photonic crystal multilayer substrate and manufacturing method thereof
- Patent number 6,416,575
- Issue date Jul 9, 2002
- NEC Corporation
- Hirohito Yamada
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Semiconductor laser array
- Patent number 5,887,012
- Issue date Mar 23, 1999
- NEC Corporation
- Hirohito Yamada
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Optical fiber remote sensing system with electromagnetic wave measu...
- Patent number 5,828,058
- Issue date Oct 27, 1998
- NEC Corporation
- Hirohito Yamada
- G01 - MEASURING TESTING
Information Patent Grant
Laser diode having narrowed radiation angle characteristic
- Patent number 5,693,965
- Issue date Dec 2, 1997
- NEC Corporation
- Hirohito Yamada
- B82 - NANO-TECHNOLOGY
Information Patent Grant
SCM type of optical signal transmission system without clipping dis...
- Patent number 5,661,580
- Issue date Aug 26, 1997
- NEC Corporation
- Hirohito Yamada
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Laser diode element with excellent intermodulation distortion chara...
- Patent number 5,568,505
- Issue date Oct 22, 1996
- NEC Corporation
- Tetsuro Okuda
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor multiquantum well structure and semiconductor laser t...
- Patent number 5,553,090
- Issue date Sep 3, 1996
- NEC Corporation
- Hirohito Yamada
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Semiconductor laser element with excellent high-temperature charact...
- Patent number 5,511,089
- Issue date Apr 23, 1996
- NEC Corporation
- Hirohito Yamada
- G02 - OPTICS
Information Patent Grant
Laser diode element with excellent intermodulation distortion chara...
- Patent number 5,469,459
- Issue date Nov 21, 1995
- NEC Corporation
- Tetsuro Okuda
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Distributed-feedback laser with improved analog modulation distorti...
- Patent number 5,394,429
- Issue date Feb 28, 1995
- NEC Corporation
- Hirohito Yamada
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
NETWORK SYSTEM AND CONFIGURATION METHOD OF NETWORK ARCHITECTURE
- Publication number 20230344269
- Publication date Oct 26, 2023
- TOHOKU UNIVERSITY
- Taiichi OTSUJI
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
NETWORK SYSTEM AND CONTROL METHOD OF NETWORK SYSTEM
- Publication number 20230327431
- Publication date Oct 12, 2023
- TOHOKU UNIVERSITY
- Taiichi OTSUJI
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
POWER SYSTEM
- Publication number 20230327436
- Publication date Oct 12, 2023
- TOHOKU UNIVERSITY
- Taiichi OTSUJI
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
COMPOSITE OPTICAL WAVEGUIDE, VARIABLE-WAVELENGTH LASER, AND METHOD...
- Publication number 20110194572
- Publication date Aug 11, 2011
- HIROYUKI YAMAZAKI
- G02 - OPTICS
Information Patent Application
OPTICAL WAVEGUIDE
- Publication number 20100232742
- Publication date Sep 16, 2010
- NEC Corporation
- Hirohito Yamada
- G02 - OPTICS
Information Patent Application
OPTICAL WAVEGUIDE, OPTICAL DEVICE, AND OPTICAL COMMUNICATION DEVICE
- Publication number 20090285522
- Publication date Nov 19, 2009
- NEC Corporation
- Akiko Gomiyou
- G02 - OPTICS
Information Patent Application
PHOTONIC CRYSTAL OPTICAL CIRCUIT AND METHOD FOR CONTROLLING THE SAME
- Publication number 20080316749
- Publication date Dec 25, 2008
- NEC Corporation
- Jun USHIDA
- G02 - OPTICS
Information Patent Application
White light pulse generating method using nonlinear optical device
- Publication number 20050213905
- Publication date Sep 29, 2005
- NEC CORPORATION
- Hirohito Yamada
- G02 - OPTICS
Information Patent Application
Waveguide structure and method of manufacturing the same
- Publication number 20050089291
- Publication date Apr 28, 2005
- NEC Corporation
- Hirohito Yamada
- G02 - OPTICS
Information Patent Application
Optical measurement of target-light waveform
- Publication number 20020024689
- Publication date Feb 28, 2002
- Masayuki Shirane
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Photonic crystal multilayer substrate and manufacturing method thereof
- Publication number 20020004307
- Publication date Jan 10, 2002
- NEC Corporation
- Hirohito Yamada
- B82 - NANO-TECHNOLOGY
Information Patent Application
Photonic crystal waveguide and directional coupler using the same
- Publication number 20010026668
- Publication date Oct 4, 2001
- NEC Corporation
- Hirohito Yamada
- B82 - NANO-TECHNOLOGY

HIROHITO YAMADA

Person

Patents Grantslast 30 patents

Composite optical waveguide, variable-wavelength laser, and method...

Optical waveguide

Photonic crystal optical circuit and method for controlling the same

Waveguide structure and method of manufacturing the same

Photonic crystal optical circuit and method for controlling the same

White light pulse generating method using nonlinear optical device

Photonic crystal waveguide and directional coupler using the same

Optical measurement of target-light waveform

Photonic crystal multilayer substrate and manufacturing method thereof

Semiconductor laser array

Optical fiber remote sensing system with electromagnetic wave measu...

Laser diode having narrowed radiation angle characteristic

SCM type of optical signal transmission system without clipping dis...

Laser diode element with excellent intermodulation distortion chara...

Semiconductor multiquantum well structure and semiconductor laser t...

Semiconductor laser element with excellent high-temperature charact...

Laser diode element with excellent intermodulation distortion chara...

Distributed-feedback laser with improved analog modulation distorti...

Patents Applicationslast 30 patents

NETWORK SYSTEM AND CONFIGURATION METHOD OF NETWORK ARCHITECTURE

NETWORK SYSTEM AND CONTROL METHOD OF NETWORK SYSTEM

POWER SYSTEM

COMPOSITE OPTICAL WAVEGUIDE, VARIABLE-WAVELENGTH LASER, AND METHOD...

OPTICAL WAVEGUIDE

OPTICAL WAVEGUIDE, OPTICAL DEVICE, AND OPTICAL COMMUNICATION DEVICE

PHOTONIC CRYSTAL OPTICAL CIRCUIT AND METHOD FOR CONTROLLING THE SAME

White light pulse generating method using nonlinear optical device

Waveguide structure and method of manufacturing the same

Optical measurement of target-light waveform

Photonic crystal multilayer substrate and manufacturing method thereof

Photonic crystal waveguide and directional coupler using the same