Wavelength-division multiplexing optical communication system and method for measuring optical performance of an output signal for the system

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.

1 . A wavelength division multiplexing passive optical network (WDM-PON) system, comprising:
 a head-end equipment; and   a plurality of tail-end equipment,   wherein the head-end equipment includes a plurality of first optical transceivers, a first optical demultiplexer/optical multiplexer (OD/OM) connected to the plurality of first optical transceivers to demultiplex/multiplex light received/transmitted from/to the plurality of first optical transceivers, and a seed source configured to provide seed signal,   wherein each of the plurality of tail-end equipment includes a second optical transceiver,   wherein the head-end equipment and each of the plurality of tail-end equipment are connected by using a second OD/OM.