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Yes i think its true that optical power measurements used as a test source to measure the power...

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Posted by HamidAliKhan

optical power measurements used as a test source to measure the power...

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Posted by waqqas1

The above detail is correct for more detail information please visit following links:

->http://www.eetimes.com/story/OEG20040129S0029

->http://www.itu.int/ITU-T/newslog/Standard+Extends+DWDM+Distance.aspx

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Posted by sagitraz

If DWDM wavelengths are to be deployed in the fiber, then optical power measurements or use the DWDM source itself as a test source. This is because optical fiber loss varies with wavelength. Also optical power measurement should be made in the same direction as the transmission system. Measurements in both directions will result in slightly different readings. Also, all fiber connections need to be clean, including the connections on the test equipment.

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Posted by casey