Unanswered Question
Tom Randstrom Mon, 03/29/2010 - 06:20

When we refer to channels on a xWDM system, whether Coarse or Dense WDM, we are talking about the number of signals (wavelengths) that can be transmitted on a fiber.  A WDM system separates a single fiber into multiple lanes of light.  I.e., for an 8 channel CWDM system, 8 signal paths are available between site A  and Site B, typically using 2 optical fibers (one transmit and one receive).  The device that separates the fiber into multiple light paths and provides the user access (via optical connectors) is the optical multiplexer/demultiplexer. A different frequency specific optical signal is required for each of the wavelength paths.  A signal is inserted into the Multiplexer at one end and removed from the fiber at the far end using a Demultiplers.  These wavelength signals can be generated by transponders or a WDM compliant transceivers (such as SFP/GBIC/XENPACK/ETCs).

WDM systems typically operate over singlemode fiber.

Let me know if this helps and if you have additional questions.


Tom Randstrom Tue, 03/30/2010 - 17:49

I am not sure if this is what you were asking for, but I have attached a diagram outlining your example (MS Powerpoint).

Let me know if this helps or if you have additional questions.



This Discussion