公开(公告)号：US20170155463A1

公开(公告)日：2017-06-01

申请号：US15431533

申请日：2017-02-13

Applicant: Electronics and Telecommunications Research Institute

Inventor： Han-Hyub LEE ,  Jie-Hyun LEE ,  Eon-Sang KIM ,  Sang-Soo LEE

IPC: H04J14/02 ,  H04B10/079

CPC classification number: H04J14/0242 ,  H04B10/0795 ,  H04B10/2587 ,  H04J14/02 ,  H04J2014/0253

Abstract: A wavelength-division multiplexing optical communication system and a method for measuring optical performance of an output signal for the system. The optical communication system includes: a service-provider device; a local node; and a plurality of subscriber devices. The service-provider device includes: a plurality of first optical transceivers; a first optical multiplexer/demultiplexer (OD/OM) connected to the plurality of first optical transceivers; and a seed-light source providing seed light. Each subscriber device includes a second optical transceiver. The local node connects the service-provider device and the plurality of subscriber devices to each other using aDWDM link comprising: a second multiplexer/demultiplexer (OD/OM); and a single-mode optical fiber for transmission. Here, the optical intensity of an output signal of the second optical transceiver is determined by compensating for the value of the loss caused when the output signal passes through the second OD/OM of the local node.

公开(公告)号：US20210336715A1

公开(公告)日：2021-10-28

申请号：US17230143

申请日：2021-04-14

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Eon-Sang KIM ,  Joonyoung KIM ,  Minkyu SUNG ,  Jong Hyun LEE ,  Seung-Hyun CHO

IPC: H04J14/02 ,  H04B10/40

Abstract: Provided is an optical transmitting and receiving system. The optical transmitting and receiving system may include: a Main Hub Unit (MHU) configured to perform wavelength division multiplexing on a plurality of downlink signals using a plurality of wavelengths and transmit the multiplexed downlink signal through a first optical cable; a first Remote Optical Unit (ROU) configured to perform demultiplexing on the multiplexed downlink signal received from the MHU and output a part of the plurality of downlink signals; and a second ROU configured to perform demultiplexing on the multiplexed downlink signal and output other part of the plurality of downlink signals.