Patent ID: 9571187
Date: 2017-02-14
CPC Classifications: H04B,H04J

Claim:
1. A wavelength division multiplexing passive optical network (WDM-PON) system including a service provider unit, a remote node, and a plurality of subscriber units, wherein the service provider unit includes a plurality of first optical transceivers, a first optical multiplexer/demultiplexer (OD/OM) connected to the plurality of first optical transceivers to multiplex/demultiplex light transmitted/received to/from the plurality of first optical transceivers, and a seed light source configured to provide seed light, each of the plurality of subscriber units includes a second optical transceiver, the remote node connects the service provider unit and the plurality of subscriber units to each other through a second OD/OM and a dense wavelength division multiplexing (DWDM) link including a single-mode transmitting optical fiber, and a light intensity of an output signal from the second optical transceiver is determined by compensating for a loss value caused when the output signal passes through the second OD/OM of the remote node, wherein the loss value is an insertion loss caused by an insertion of the DWDM link with a value greater than or equal to 3 dB, wherein the insertion loss is a loss of an amplified spontaneous emission (ASE) within the output signal caused by insertion of the DWDM link that allows the light intensity of the output signal without the ASE to be determined, and wherein the DWDM link removes the ASE when the light intensity of the output signal is measured.