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DWDM basics Concepts Technology Free PDF ,PPT,Documentation,Review

1 July 2011 36,270 views No Comment

 

Originally refers to optical signals multiplexed within the 1550-nm band so as to leverage the capabilities (and cost) of erbium doped fiber amplifiers (EDFAs), which are effective for wavelengths between approximately 1525 nm -
1565 nm (C band), and/or 1570 nm – 1610 nm (L band).• EDFAs can amplify any optical signal in their operating range, regardless of the modulated bit rate. • EDFAs therefore allow a single-channel optical link to be
upgraded in bit rate by replacing only equipment at the ends of the link, while retaining the existing EDFA or series of EDFAs along a long haul route.

DWDM terminal demultiplexer
• The terminal demultiplexer breaks the multi-wavelength signal back into individual signals and outputs them on separate fibres for client-layer systems (such as SONET/SDH) to detect.

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