Tsutomu Tajima

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Chromatic dispersion compensation using sign operations and lookup...
- Patent number 8,718,474
- Issue date May 6, 2014
- NEC Laboratories America, Inc.
- Dayou Qian
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical signal division transmission system, optical transmitter, o...
- Patent number 8,391,706
- Issue date Mar 5, 2013
- NEC Corporation
- Keiichi Yamada
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Integrated equalizer and Michelson interferometer structure for int...
- Patent number 8,218,977
- Issue date Jul 10, 2012
- NEC Laboratories America, Inc.
- Philip Nan Ji
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Intra-channel equalizing optical interleaver
- Patent number 8,064,768
- Issue date Nov 22, 2011
- NEC Laboratories America, Inc.
- Philip Nan Ji
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Transponder, transmission system, transmission method and transmiss...
- Patent number 7,920,559
- Issue date Apr 5, 2011
- NEC Corporation
- Naoya Shiota
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Wavelength control circuit and wavelength control method of light e...
- Patent number 6,522,675
- Issue date Feb 18, 2003
- NEC Corporation
- Tsutomu Tajima
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
AUTOMATIC IDENTIFICATION LEVEL CONTROL CIRCUIT, IDENTIFICATION LEVE...
- Patent number 6,420,962
- Issue date Jul 16, 2002
- NEC Corporation
- Yoshihiro Matsumoto
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Transmitting apparatus and receiving apparatus for wavelength-divis...
- Patent number 6,081,359
- Issue date Jun 27, 2000
- NEC Corporation
- Tsukasa Takehana
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical amplifying apparatus and linear relay optical amplifier tra...
- Patent number 6,055,093
- Issue date Apr 25, 2000
- NEC Corporation
- Tadayuki Chikuma
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Wavelength-division-multiplexing optical amplifier device and wavel...
- Patent number 5,995,276
- Issue date Nov 30, 1999
- NEC Corporation
- Tsutomu Tajima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical fiber amp repeater of amplifying an optical signal and supe...
- Patent number 5,926,304
- Issue date Jul 20, 1999
- NEC Corporation
- Tsutomu Tajima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Wavelength multiplexing optical transmission device
- Patent number 5,768,000
- Issue date Jun 16, 1998
- NEC Corporation
- Tsutomu Tajima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
DC bias controller for optical modulator
- Patent number 5,726,794
- Issue date Mar 10, 1998
- NEC Corporation
- Tsutomu Tajima
- G02 - OPTICS
Information Patent Grant
Wavelength-stabilizing method and its associated circuitry for an o...
- Patent number 5,367,397
- Issue date Nov 22, 1994
- NEC Corporation
- Tsutomu Tajima
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Driver circuit for driving a light emitting element by superimposin...
- Patent number 4,864,649
- Issue date Sep 5, 1989
- NEC Corporation
- Tsutomu Tajima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
CHROMATIC DISPERSION COMPENSATION USING SIGN OPERATIONS AND LOOKUP...
- Publication number 20120301157
- Publication date Nov 29, 2012
- NEC Corporation
- Dayou Qian
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Transponder Aggregator Without Wavelength Selector for Colorless an...
- Publication number 20110286746
- Publication date Nov 24, 2011
- NEC Laboratories America, Inc.
- Philip Nan Ji
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Modified Michelson Interferometer Structure for Inter-Symbol Interf...
- Publication number 20100232789
- Publication date Sep 16, 2010
- NEC Laboratories America, Inc.
- Philip Nan Ji
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Integrated Equalizer and Michelson Interferometer Structure for Int...
- Publication number 20100232803
- Publication date Sep 16, 2010
- NEC Laboratories America, Inc.
- Philip Nan Ji
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL SIGNAL DIVISION TRANSMISSION SYSTEM, OPTICAL TRANSMITTER, O...
- Publication number 20090238556
- Publication date Sep 24, 2009
- Keiichi Yamada
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL TRANSMITTER, OPTICAL TRANSMISSION SYSTEM AND MODULATION SCH...
- Publication number 20090180785
- Publication date Jul 16, 2009
- TSUTOMU TAJIMA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Intra-Channel Equalizing Optical Interleaver
- Publication number 20090162066
- Publication date Jun 25, 2009
- NEC Laboratories America, Inc.
- Philip Nan Ji
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Inter-Symbol Interference-Suppressed Colorless DPSK Demodulation
- Publication number 20080240736
- Publication date Oct 2, 2008
- NEC Laboratories America, Inc.
- Philip Nan Ji
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
TRANSPONDER, TRANSMISSION SYSTEM, TRANSMISSION METHOD AND TRANSMISS...
- Publication number 20080225887
- Publication date Sep 18, 2008
- NAOYA SHIOTA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
COLORLESS OPTICAL DEMODULATOR FOR DIFFERENTIAL QUADRATURE PHASE SHI...
- Publication number 20080199189
- Publication date Aug 21, 2008
- NEC AMERICA INC.
- Lei XU
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
All Order Polarization Mode Dispersion Compensation with Spectral I...
- Publication number 20080002972
- Publication date Jan 3, 2008
- NEC Laboratories America, Inc.
- Arthur Dogariu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL EQUALIZATION FILTERING OF DWDM CHANNELS
- Publication number 20070206898
- Publication date Sep 6, 2007
- NEC LABORATORIES AMERICA
- Ting WANG
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Tsutomu Tajima

Person

Patents Grantslast 30 patents

Chromatic dispersion compensation using sign operations and lookup...

Optical signal division transmission system, optical transmitter, o...

Integrated equalizer and Michelson interferometer structure for int...

Intra-channel equalizing optical interleaver

Transponder, transmission system, transmission method and transmiss...

Wavelength control circuit and wavelength control method of light e...

AUTOMATIC IDENTIFICATION LEVEL CONTROL CIRCUIT, IDENTIFICATION LEVE...

Transmitting apparatus and receiving apparatus for wavelength-divis...

Optical amplifying apparatus and linear relay optical amplifier tra...

Wavelength-division-multiplexing optical amplifier device and wavel...

Optical fiber amp repeater of amplifying an optical signal and supe...

Wavelength multiplexing optical transmission device

DC bias controller for optical modulator

Wavelength-stabilizing method and its associated circuitry for an o...

Driver circuit for driving a light emitting element by superimposin...

Patents Applicationslast 30 patents

CHROMATIC DISPERSION COMPENSATION USING SIGN OPERATIONS AND LOOKUP...

Transponder Aggregator Without Wavelength Selector for Colorless an...

Modified Michelson Interferometer Structure for Inter-Symbol Interf...

Integrated Equalizer and Michelson Interferometer Structure for Int...

OPTICAL SIGNAL DIVISION TRANSMISSION SYSTEM, OPTICAL TRANSMITTER, O...

OPTICAL TRANSMITTER, OPTICAL TRANSMISSION SYSTEM AND MODULATION SCH...

Intra-Channel Equalizing Optical Interleaver

Inter-Symbol Interference-Suppressed Colorless DPSK Demodulation

TRANSPONDER, TRANSMISSION SYSTEM, TRANSMISSION METHOD AND TRANSMISS...

COLORLESS OPTICAL DEMODULATOR FOR DIFFERENTIAL QUADRATURE PHASE SHI...

All Order Polarization Mode Dispersion Compensation with Spectral I...

OPTICAL EQUALIZATION FILTERING OF DWDM CHANNELS