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Technology Stocks : George Gilder - Forbes ASAP
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To: Asterisk who wrote (739)10/23/1998 12:46:00 PM
From: George Gilder  Read Replies (2) of 5853
 
WDM is wavelength division multiplexing--sending many bitstreams on different colors of light (actually infrared), down a single strand of fiber. This hugely increases the possible capacity of the fiber. It also hugely increases flexibility, by allowing cheap add-drop functions. You can take a bitstream off a backbone by passive optical filtering of wavelengths (called lambdas) rather than by megadollar processing of all the contents of the pipe (in order to tap one desired bitstream, as SONET requires).

DWDM is a ridiculous acronym that noone should use. It means "dense" WDM and is normally invoked by companies that have less dense systems than the state of the art, which is at least 16 lambdas, heading for 120 at Ciena. It is a stupid marketing term.
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