Patents by Inventor Ryuji Aida
Ryuji Aida has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11914191Abstract: To provide an optical branch coupler which facilitates communizing the design of an optical transmission path, the optical branch coupler comprising: a first add drop unit for outputting a third optical signal to a first line in which a first optical signal received from the first line and a second optical signal inserted into the first line are multiplexed and outputting the first optical signal; and a second add drop unit for receiving the first optical signal, receiving a sixth optical signal from a second line different from the first line in which a fourth optical signal and a fifth optical signal dropped from the second line are wavelength multiplexed, demultiplexing the fourth and fifth optical signals, and outputting a seventh optical signal to the second line in which the fourth optical signal and the first optical signal transmitted by the first add drop unit are multiplexed.Type: GrantFiled: February 3, 2020Date of Patent: February 27, 2024Assignee: NEC CORPORATIONInventor: Ryuji Aida
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Patent number: 11888583Abstract: Aspects of the present disclosure describe systems, methods. and structures directed to an integrated 3-way branching unit switch module suitable for undersea application.Type: GrantFiled: December 6, 2021Date of Patent: January 30, 2024Assignee: NEC CorporationInventors: Fatih Yaman, Shinsuke Fujisawa, Hussam Batshon, Takigawa Yoshinari, Ryuji Aida, Takanori Inoue, Eduardo Rodriguez, Yoshihisa Inada
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Publication number: 20230344521Abstract: In order to avoid the phenomenon of communication being impeded and signals transmitted by the plurality of slave devices overlapping, a communication system according to the present invention has the first master device transmits a first pulsed light to the first transmission path and receives a return light of the first pulsed light from the second transmission path; each of the slave devices modulates the first pulsed light, and outputs the modulated first pulsed light as the return light of the first pulsed light; and the width of the first pulsed light is narrower than double the shortest distance from among the transmission distance between the slave device outputting the return light and the transmission distance between the first master device and the slave device outputting the return light.Type: ApplicationFiled: September 27, 2021Publication date: October 26, 2023Applicant: NEC CorporationInventors: Yutaka YANO, Yoshihisa Inada, Takehiro Nakano, Ryuji Aida
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Patent number: 11705971Abstract: An optical transmission apparatus outputs a main signal. An optical transmission apparatus superimposes a monitoring signal on an optical signal and outputs it. A submarine branching apparatus includes a return unit configured to return the monitoring signal received from the optical transmission apparatus and is configured to switch an output destination of the main signal received from the optical transmission apparatus to an optical transmission apparatus or the optical transmission apparatus. The optical transmission apparatus is configured to detect the monitoring signal returned from the return unit and notifies the optical transmission apparatus of a result of the detection. The optical transmission apparatus instructs the submarine branching apparatus to switch the output destination of the main signal in accordance with the notification.Type: GrantFiled: August 15, 2018Date of Patent: July 18, 2023Assignee: NEC CORPORATIONInventors: Ryuji Aida, Eduardo Mateo Rodriguez
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Patent number: 11700067Abstract: Aspects of the present disclosure describe a three-way branching unit switch module having a small footprint suitable for application in an undersea application.Type: GrantFiled: September 7, 2021Date of Patent: July 11, 2023Assignee: NEC CorporationInventors: Fatih Yaman, Shinsuke Fujisawa, Hussam Batshon, Yoshinari Takigawa, Ryu Kurahashi, Ryuji Aida, Kohei Nakamura, Takanori Inoue, Eduardo Rodriguez, Yoshihisa Inada
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Patent number: 11658750Abstract: An optical transmission apparatus outputs a main signal. An optical transmission apparatus superimposes a monitoring signal on an optical signal and outputs it. A submarine branching apparatus includes a return unit configured to return the monitoring signal received from the optical transmission apparatus and is configured to switch an output destination of the main signal received from the optical transmission apparatus to an optical transmission apparatus or the optical transmission apparatus. The optical transmission apparatus is configured to detect the monitoring signal returned from the return unit and notifies the optical transmission apparatus of a result of the detection. The optical transmission apparatus instructs the submarine branching apparatus to switch the output destination of the main signal in accordance with the notification.Type: GrantFiled: August 15, 2018Date of Patent: May 23, 2023Assignee: NEC CORPORATIONInventors: Ryuji Aida, Eduardo Mateo Rodriguez
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Patent number: 11438087Abstract: An optical branching/coupling device includes: a first optical branching unit that splits first light with a first and a second wavelength, and outputs second light and third light; a wavelength selector that receives the second light, receives fourth light with a third wavelength, output fifth and sixth light, one of the fifth light and the sixth light including an optical signal of the first wavelength of the second light and including the fourth light, and the other including an optical signal of the second wavelength; a first light switch that receives the fifth light and the sixth light, output one of the fifth light and the sixth light as seventh light, and output the other as eighth light; and a second light switch that receives the third light, receives the eighth light, and outputs the third or the eighth light that have been input as ninth light.Type: GrantFiled: July 6, 2021Date of Patent: September 6, 2022Assignee: NEC CORPORATIONInventor: Ryuji Aida
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Publication number: 20220182170Abstract: Aspects of the present disclosure describe systems, methods. and structures directed to an integrated 3-way branching unit switch module suitable for undersea application.Type: ApplicationFiled: December 6, 2021Publication date: June 9, 2022Applicant: NEC LABORATORIES AMERICA, INCInventors: Fatih YAMAN, Shinsuke FUJISAWA, Hussam BATSHON, Takigawa YOSHINARI, Ryuji AIDA, Takanori INOUE, Eduardo Rodriguez, Yoshihisa INADA
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Publication number: 20220113471Abstract: To provide an optical branch coupler which facilitates communizing the design of an optical transmission path, the optical branch coupler comprising: a first add drop unit for outputting a third optical signal to a first line in which a first optical signal received from the first line and a second optical signal inserted into the first line are multiplexed and outputting the first optical signal; and a second add drop unit for receiving the first optical signal, receiving a sixth optical signal from a second line different from the first line in which a fourth optical signal and a fifth optical signal dropped from the second line are wavelength multiplexed, demultiplexing the fourth and fifth optical signals, and outputting a seventh optical signal to the second line in which the fourth optical signal and the first optical signal transmitted by the first add drop unit are multiplexed.Type: ApplicationFiled: February 3, 2020Publication date: April 14, 2022Applicant: NEC CorporationInventor: Ryuji AIDA
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Publication number: 20220085896Abstract: Aspects of the present disclosure describe a three-way branching unit switch module having a small footprint suitable for application in an undersea application.Type: ApplicationFiled: September 7, 2021Publication date: March 17, 2022Applicants: NEC Laboratories America, Inc., NEC CorporationInventors: Fatih YAMAN, Shinsuke FUJISAWA, Hussam BATSHON, Yoshinari Takigawa, Ryu Kurahashi, Ryuji Aida, Kohei NAKAMURA, Takanori INOUE, Eduardo RODRIGUEZ, Yoshihisa INADA
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Publication number: 20210336714Abstract: An optical branching/coupling device includes: a first optical branching unit that splits first light with a first and a second wavelength, and outputs second light and third light; a wavelength selector that receives the second light, receives fourth light with a third wavelength, output fifth and sixth light, one of the fifth light and the sixth light including an optical signal of the first wavelength of the second light and including the fourth light, and the other including an optical signal of the second wavelength; a first light switch that receives the fifth light and the sixth light, output one of the fifth light and the sixth light as seventh light, and output the other as eighth light; and a second light switch that receives the third light, receives the eighth light, and outputs the third or the eighth light that have been input as ninth light.Type: ApplicationFiled: July 6, 2021Publication date: October 28, 2021Applicant: NEC CorporationInventor: Ryuji AIDA
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Patent number: 11159264Abstract: In order to provide an optical transmission device capable of implementing the spectral control of WDM signals while taking into account optical component characteristics, an optical transmission device is provided with: a WSS; a wavelength monitor that outputs a signal expressing a first spectrum, which is the spectrum of the WSS optical output; an optical processing unit that subjects the WSS optical output to prescribed processing; a temperature monitor that outputs a signal indicating the temperature of an optical processing means; and a control unit that receives the input of the signal expressing the first spectrum and the signal indicating the temperature, and controls the transmission characteristics of the WSS on the basis of the first spectrum and the temperature.Type: GrantFiled: March 11, 2019Date of Patent: October 26, 2021Assignee: NEC CORPORATIONInventor: Ryuji Aida
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Patent number: 11082145Abstract: An optical branching/coupling device includes: a first optical branching unit that splits first light with a first and a second wavelength, and outputs second light and third light; a wavelength selector that receives the second light, receives fourth light with a third wavelength, output fifth and sixth light, one of the fifth light and the sixth light including an optical signal of the first wavelength of the second light and including the fourth light, and the other including an optical signal of the second wavelength; a first light switch that receives the fifth light and the sixth light, output one of the fifth light and the sixth light as seventh light, and output the other as eighth light; and a second light switch that receives the third light, receives the eighth light, and outputs the third or the eighth light that have been input as ninth light.Type: GrantFiled: June 16, 2020Date of Patent: August 3, 2021Assignee: NEC CORPORATIONInventor: Ryuji Aida
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Publication number: 20210194597Abstract: An optical transmission apparatus outputs a main signal. An optical transmission apparatus superimposes a monitoring signal on an optical signal and outputs it. A submarine branching apparatus includes a return unit configured to return the monitoring signal received from the optical transmission apparatus and is configured to switch an output destination of the main signal received from the optical transmission apparatus to an optical transmission apparatus or the optical transmission apparatus. The optical transmission apparatus is configured to detect the monitoring signal returned from the return unit and notifies the optical transmission apparatus of a result of the detection. The optical transmission apparatus instructs the submarine branching apparatus to switch the output destination of the main signal in accordance with the notification.Type: ApplicationFiled: August 15, 2018Publication date: June 24, 2021Applicant: NEC CorporationInventors: Ryuji AIDA, Eduardo MATEO RODRIGUEZ
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Publication number: 20200412476Abstract: In order to provide an optical transmission device capable of implementing the spectral control of WDM signals while taking into account optical component characteristics, an optical transmission device is provided with: a WSS; a wavelength monitor that outputs a signal expressing a first spectrum, which is the spectrum of the WSS optical output; an optical processing unit that subjects the WSS optical output to prescribed processing; a temperature monitor that outputs a signal indicating the temperature of an optical processing means; and a control unit that receives the input of the signal expressing the first spectrum and the signal indicating the temperature, and controls the transmission characteristics of the WSS on the basis of the first spectrum and the temperature.Type: ApplicationFiled: March 11, 2019Publication date: December 31, 2020Applicant: NEC CorporationInventor: Ryuji AIDA
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Patent number: 10855392Abstract: Aspects of the present disclosure describe systems, methods and structures including high-density submarine/undersea reconfigurable optical add/drop multiplexers (ROADM) having remote wavelength selective switch (WSS) redundancy.Type: GrantFiled: November 12, 2019Date of Patent: December 1, 2020Inventors: Eduardo Mateo Rodriguez, Ryuji Aida, Takehiro Nakano
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Publication number: 20200313789Abstract: An optical branching/coupling device includes: a first optical branching unit that splits first light with a first and a second wavelength, and outputs second light and third light; a wavelength selector that receives the second light, receives fourth light with a third wavelength, output fifth and sixth light, one of the fifth light and the sixth light including an optical signal of the first wavelength of the second light and including the fourth light, and the other including an optical signal of the second wavelength; a first light switch that receives the fifth light and the sixth light, output one of the fifth light and the sixth light as seventh light, and output the other as eighth light; and a second light switch that receives the third light, receives the eighth light, and outputs the third or the eighth light that have been input as ninth light.Type: ApplicationFiled: June 16, 2020Publication date: October 1, 2020Applicant: NEC CorporationInventor: Ryuji AIDA
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Publication number: 20200252700Abstract: In order to efficiently assign a communication resource of an optical transmission system, a resource allocation device includes a resource calculation unit that derives, based on a communication resource required in a communication between terminal stations opposing via a path, a communication resource required for the path, and calculates, based on a communication resource assignable to the path and the derived communication resource required for the path, a communication resource to be assigned to the path, and an interface that transmits, to a communication device that sets a communication resource to the path, a communication resource to be assigned to the path.Type: ApplicationFiled: September 19, 2018Publication date: August 6, 2020Applicant: NEC CorporationInventor: Ryuji AIDA
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Patent number: 10715270Abstract: An optical branching/coupling device includes: a first optical branching unit that splits first light with a first and a second wavelength, and outputs second light and third light; a wavelength selector that receives the second light, receives fourth light with a third wavelength, output fifth and sixth light, one of the fifth light and the sixth light including an optical signal of the first wavelength of the second light and including the fourth light, and the other including an optical signal of the second wavelength; a first light switch that receives the fifth light and the sixth light, output one of the fifth light and the sixth light as seventh light, and output the other as eighth light; and a second light switch that receives the third light, receives the eighth light, and outputs the third or the eighth light that have been input as ninth light.Type: GrantFiled: October 20, 2017Date of Patent: July 14, 2020Assignee: NEC CORPORATIONInventor: Ryuji Aida
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Publication number: 20200153531Abstract: Aspects of the present disclosure describe systems, methods and structures including high-density submarine/undersea reconfigurable optical add/drop multiplexers (ROADM) having remote wavelength selective switch (WSS) redundancy.Type: ApplicationFiled: November 4, 2019Publication date: May 14, 2020Applicant: NEC LABORATORIES AMERICA, INCInventors: Eduardo Mateo RODRIGUEZ, RYUJI AIDA, Takehiro NAKANO