公开(公告)号：US11082145B2

公开(公告)日：2021-08-03

申请号：US16902654

申请日：2020-06-16

Applicant: NEC Corporation

Inventor： Ryuji Aida

IPC: H04J14/02 ,  H04B10/03 ,  H04B10/032

Abstract: 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.

公开(公告)号：US09912407B2

公开(公告)日：2018-03-06

申请号：US15128374

申请日：2015-02-27

Applicant: NEC Corporation

Inventor： Ryuji Aida

IPC: H04B10/299 ,  H04B10/079 ,  H04B10/296 ,  H04J14/02

CPC classification number: H04B10/299 ,  H04B10/0777 ,  H04B10/0793 ,  H04B10/0797 ,  H04B10/296 ,  H04J14/0221 ,  H04J14/0227

Abstract: An optical relay device is provided which is capable of outputting control signal light without equipping a light source for the control signal light and capable of flexibly managing and changing a wavelength of the control signal light in accordance with a state of a network. The optical relay device includes an optical receiving unit that receives a wavelength multiplexed optical signal, a control unit that specifies a first wavelength and outputting notification information, and a processing unit that selects an optical signal having the first wavelength from the received wavelength multiplexed optical signal, applying intensity-modulation in accordance with the notification information to the selected optical signal, adding the intensity-modulated optical signal back to the wavelength multiplexed optical signal, and outputting the wavelength multiplexed optical signal.