| Patent | Date |
|---|
Wavelength converter and fiber optic transmission system
Grant 11,387,912 - Nakagawa , et al. July 12, 2 | 2022-07-12 |
Wavelength Converter And Fiber Optic Transmission System
App 20220158741 - NAKAGAWA; Goji ; et al. | 2022-05-19 |
Wavelength conversion device and method of performing wavelength conversion
Grant 11,163,119 - Yamauchi , et al. November 2, 2 | 2021-11-02 |
Wavelength Converter, Optical Communication System, And Method For Adjusting Wavelength Converter
App 20210103200 - NAKAGAWA; GOJI ; et al. | 2021-04-08 |
Wavelength converter and transmission apparatus
Grant 10,955,727 - Nakagawa , et al. March 23, 2 | 2021-03-23 |
Wavelength converter apparatus and method of performing wavelength conversion
Grant 10,948,802 - Nakagawa , et al. March 16, 2 | 2021-03-16 |
Wavelength Conversion Device And Method Of Performing Wavelength Conversion
App 20200379180 - YAMAUCHI; Tomohiro ; et al. | 2020-12-03 |
Optical transmission apparatus, optical transmission system, and optical transmission method
Grant 10,797,799 - Nakagawa , et al. October 6, 2 | 2020-10-06 |
Transmission device, optical termination device, transmission system, and transmission method
Grant 10,763,986 - Sone , et al. Sep | 2020-09-01 |
Wavelength Converter And Transmission Apparatus
App 20200264492 - NAKAGAWA; GOJI ; et al. | 2020-08-20 |
Wavelength Converter And Method Of Performing Wavelength Conversion
App 20200241384 - NAKAGAWA; GOJI ; et al. | 2020-07-30 |
Optical terminal device, optical terminating device, and communication control method
Grant 10,567,082 - Sone , et al. Feb | 2020-02-18 |
Transmission Device, Optical Termination Device, Transmission System, And Transmission Method
App 20200052807 - Sone; Kyosuke ; et al. | 2020-02-13 |
Optical Transmission Apparatus, Optical Transmission System, And Optical Transmission Method
App 20190165865 - NAKAGAWA; GOJI ; et al. | 2019-05-30 |
Transmission apparatus, transmission system and data detection method
Grant 10,268,227 - Nakagawa , et al. | 2019-04-23 |
Optical transmitting apparatus and optical level control method
Grant 10,261,350 - Nakagawa , et al. | 2019-04-16 |
Optical communication system, transmission station, and method of optical communication
Grant 10,200,132 - Sone , et al. Fe | 2019-02-05 |
Optical transport apparatus and optical-wavelength defragmenting method
Grant 10,187,172 - Nakagawa , et al. Ja | 2019-01-22 |
Apparatus and method for estimating optical transmission performance
Grant 10,158,422 - Oda , et al. Dec | 2018-12-18 |
Optical Terminal Device, Optical Terminating Device, And Communication Control Method
App 20180359032 - SONE; Kyosuke ; et al. | 2018-12-13 |
Optical communication system, optical receiver and optical transmitter
Grant 10,069,567 - Nakagawa September 4, 2 | 2018-09-04 |
Optical Transmitting Apparatus And Optical Level Control Method
App 20180180909 - NAKAGAWA; Goji ; et al. | 2018-06-28 |
Transmission Apparatus, Transmission System And Data Detection Method
App 20180074539 - NAKAGAWA; GOJI ; et al. | 2018-03-15 |
Optical receiver and superimposed signal detecting method
Grant 9,838,148 - Nakagawa , et al. December 5, 2 | 2017-12-05 |
Apparatus And Method For Estimating Optical Transmission Performance
App 20170310391 - Oda; Shoichiro ; et al. | 2017-10-26 |
Optical Transport Apparatus And Optical-wavelength Defragmenting Method
App 20170279556 - NAKAGAWA; Goji ; et al. | 2017-09-28 |
Optical Communication System, Transmission Station, And Method Of Optical Communication
App 20170279538 - Sone; Kyosuke ; et al. | 2017-09-28 |
Communication device and wavelength adjustment method
Grant 9,705,604 - Sone , et al. July 11, 2 | 2017-07-11 |
Optical receiver that has function to detect signal superimposed on optical signal and method for receiving optical signal
Grant 9,698,929 - Yoshida , et al. July 4, 2 | 2017-07-04 |
Optical Transmission Device And Optical Transmission System
App 20170155981 - NAKAGAWA; GOJI ; et al. | 2017-06-01 |
Optical Transmission Apparatus, Network Control Apparatus, And Optical Transmission System
App 20170149497 - YAMAUCHI; Tomohiro ; et al. | 2017-05-25 |
Optical Communication System, Optical Receiver And Optical Transmitter
App 20170041075 - NAKAGAWA; GOJI | 2017-02-09 |
Optical Receiver And Superimposed Signal Detecting Method
App 20160337070 - NAKAGAWA; GOJI ; et al. | 2016-11-17 |
Device and method for monitoring optical signal quality, and optical transmission device
Grant 9,496,953 - Nakagawa , et al. November 15, 2 | 2016-11-15 |
Communication Device And Wavelength Adjustment Method
App 20160294479 - Sone; Kyosuke ; et al. | 2016-10-06 |
Optical Receiver That Has Function To Detect Signal Superimposed On Optical Signal And Method For Receiving Optical Signal
App 20160277139 - Yoshida; Setsuo ; et al. | 2016-09-22 |
Transmission device and optical transmission system
Grant 9,444,573 - Nakagawa , et al. September 13, 2 | 2016-09-13 |
Apparatus and method for monitoring wavelength tunable optical filter
Grant 9,350,479 - Sone , et al. May 24, 2 | 2016-05-24 |
Transmission Device And Optical Transmission System
App 20150280852 - NAKAGAWA; GOJI ; et al. | 2015-10-01 |
Optical signal demodulator, optical signal demodulating method, and optical add-drop multiplexer
Grant 9,143,242 - Nakagawa , et al. September 22, 2 | 2015-09-22 |
Device And Method For Monitoring Optical Signal Quality, And Optical Transmission Device
App 20150155934 - Nakagawa; Goji ; et al. | 2015-06-04 |
Optical amplification apparatus
Grant 9,019,593 - Yoshida , et al. April 28, 2 | 2015-04-28 |
Optical receiving device and communication system
Grant 8,942,567 - Nakagawa , et al. January 27, 2 | 2015-01-27 |
Optical amplifying device
Grant 8,896,914 - Nakagawa , et al. November 25, 2 | 2014-11-25 |
Wavelength-tunable light source and wavelength variation method
Grant 8,861,557 - Nakagawa , et al. October 14, 2 | 2014-10-14 |
Optical Signal Demodulator, Optical Signal Demodulating Method, And Optical Add-drop Multiplexer
App 20140270781 - NAKAGAWA; Goji ; et al. | 2014-09-18 |
Apparatus And Method For Monitoring Wavelength Tunable Optical Filter
App 20140205281 - SONE; Kyosuke ; et al. | 2014-07-24 |
Optical coupling structure and array optical amplification module
Grant 8,757,898 - Nakagawa June 24, 2 | 2014-06-24 |
Wavelength-tunable Light Source And Wavelength Variation Method
App 20140098828 - NAKAGAWA; GOJI ; et al. | 2014-04-10 |
Optical amplification module and optical switch device
Grant 8,654,440 - Nakagawa February 18, 2 | 2014-02-18 |
Optical Coupling Structure And Array Optical Amplification Module
App 20130236143 - NAKAGAWA; Goji | 2013-09-12 |
Optical module
Grant 8,437,589 - Nakagawa May 7, 2 | 2013-05-07 |
Optical Amplifying Device
App 20130038925 - Nakagawa; Goji ; et al. | 2013-02-14 |
Optical Amplification Apparatus
App 20120257272 - YOSHIDA; Setsuo ; et al. | 2012-10-11 |
Optical Receiving Device And Communication System
App 20120213528 - NAKAGAWA; Goji ; et al. | 2012-08-23 |
Optical Amplification Module And Optical Switch Device
App 20120019903 - NAKAGAWA; Goji | 2012-01-26 |
Optical gate array device
Grant 8,014,642 - Nakagawa September 6, 2 | 2011-09-06 |
Optical Module
App 20110081112 - NAKAGAWA; Goji | 2011-04-07 |
Optical network system and transmission apparatus
Grant 7,826,744 - Miyata , et al. November 2, 2 | 2010-11-02 |
SOA array optical module
Grant 7,702,197 - Nakagawa April 20, 2 | 2010-04-20 |
Optical add/drop multiplexer and optical network system
Grant 7,657,181 - Terai , et al. February 2, 2 | 2010-02-02 |
Optical amplification system and optical amplification method
App 20100007943 - Nakagawa; Goji ; et al. | 2010-01-14 |
Optical Gate Array Device
App 20090279830 - NAKAGAWA; Goji | 2009-11-12 |
Optical semiconductor apparatus
App 20090232173 - Nakagawa; Goji | 2009-09-17 |
Optical gate array device
Grant 7,548,669 - Nakagawa June 16, 2 | 2009-06-16 |
Ring type optical transmission system and optical apparatus connected to same
Grant 7,460,744 - Nakagawa December 2, 2 | 2008-12-02 |
Soa Array Optical Module
App 20080226229 - NAKAGAWA; Goji | 2008-09-18 |
Acousto-optic tunable filter control apparatus automatically adjusting frequency and power of radio frequency signal
Grant 7,405,858 - Noguchi , et al. July 29, 2 | 2008-07-29 |
Optical transmission device
Grant 7,406,262 - Nakagawa , et al. July 29, 2 | 2008-07-29 |
Optical gate array device
App 20080101747 - Nakagawa; Goji | 2008-05-01 |
Optical gate array device
App 20080050067 - Nakagawa; Goji | 2008-02-28 |
Acousto-optic tunable filter control apparatus automatically adjusting frequency and power of radio frequency signal
App 20070171505 - Noguchi; Masaji ; et al. | 2007-07-26 |
Optical add/drop multiplexer and optical network system
App 20070172240 - Terai; Noboru ; et al. | 2007-07-26 |
Optical network system and transmission apparatus
App 20060171715 - Miyata; Hideyuki ; et al. | 2006-08-03 |
Wavelength multiplexing processing apparatus
Grant 7,079,728 - Nakagawa , et al. July 18, 2 | 2006-07-18 |
Ring type optical transmission system and optical apparatus connected to same
App 20060115210 - Nakagawa; Goji | 2006-06-01 |
Optical add/drop multiplexer
App 20060023996 - Nakagawa; Goji ; et al. | 2006-02-02 |
Arrayed waveguide wavelength multiplexing apparatus and optical transmitter
Grant 6,985,657 - Nakagawa January 10, 2 | 2006-01-10 |
Signal transceiving method for use in optical ring network and optical node for the same
App 20050180752 - Nakagawa, Goji | 2005-08-18 |
Optical transmission device
App 20050169633 - Nakagawa, Goji ; et al. | 2005-08-04 |
Arrayed waveguide wavelength multiplexing apparatus and optical transmitter
App 20050141813 - Nakagawa, Goji | 2005-06-30 |
Planar optical waveguide device
Grant 6,847,772 - Inoue , et al. January 25, 2 | 2005-01-25 |
Waveguide optical device
Grant 6,807,354 - Nakagawa , et al. October 19, 2 | 2004-10-19 |
Wavelength multiplexing processing apparatus
App 20040165817 - Nakagawa, Goji ; et al. | 2004-08-26 |
Ferrule assembly and optical module
Grant 6,669,378 - Nobuhara , et al. December 30, 2 | 2003-12-30 |
Ferrule assembly and optical module
Grant 6,641,308 - Nobuhara , et al. November 4, 2 | 2003-11-04 |
Planar optical waveguide device
App 20030152353 - Inoue, Tadao ; et al. | 2003-08-14 |
Ferrule assembly and receptacle type optical transmission module
Grant 6,599,029 - Yamazaki , et al. July 29, 2 | 2003-07-29 |
Waveguide optical device
App 20030123831 - Nakagawa, Goji ; et al. | 2003-07-03 |
Ferrule assembly and optical module
App 20030048997 - Nobuhara, Hiroyuki ; et al. | 2003-03-13 |
Ferrule assembly and optical module
App 20020146217 - Nobuhara, Hiroyuki ; et al. | 2002-10-10 |
Ferrule assembly and optical module
App 20020102069 - Nobuhara, Hiroyuki ; et al. | 2002-08-01 |
Ferrule assembly and receptacle type optical transmission module
App 20020034362 - Yamazaki, Yousuke ; et al. | 2002-03-21 |
Ferrule assembly and optical module
App 20010010742 - Nakagawa, Goji ; et al. | 2001-08-02 |
Resin sealed optical module
Grant 6,269,209 - Terada , et al. July 31, 2 | 2001-07-31 |
Wavelength division multiplexing optical device and manufacturing method therefor
Grant 6,085,000 - Tanaka , et al. July 4, 2 | 2000-07-04 |
Photodetector module
Grant 6,049,638 - Norimatsu , et al. April 11, 2 | 2000-04-11 |
Optical module for connecting optical element and optical fiber
Grant 5,966,488 - Miura , et al. October 12, 1 | 1999-10-12 |
Optical transmission terminal device
Grant 5,960,141 - Sasaki , et al. September 28, 1 | 1999-09-28 |
Optical module including a photoreception device
Grant 5,883,988 - Yamamoto , et al. March 16, 1 | 1999-03-16 |
Optical module for connecting optical element and optical fiber
Grant 5,748,822 - Miura , et al. May 5, 1 | 1998-05-05 |
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