Alcatel-Lucent 1830 PSS-16 Maintenance And Trouble-Clearing User Manual page 720

Glossary
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W wave division multiplexing (WDM)
WDM merges optical traffic onto one common fiber, sending several signals through one fiber
with different wavelengths of light. WDM allows flexibility in expanding bandwidth. It reduces
costly mux/demux function, and it reuses existing optical signals.See dense wave division
multiplexing (DWDM).
wave key
A component of the Wavelength Tracker monitoring capability that is used to identify individual
wavelengths through the network.
A wave key is a number between 1 and 2048. Each WDM wavelength in a 1830 PSS-32 network
is uniquely identified by a pair of wave keys.
waveguide
A material medium that confines and guides a propagating electromagnetic wave.
waveguide coupler
A coupler that transfers light between planar waveguides.
wavelength
The distance between points of corresponding phase of two consecutive cycles of a wave,
typically measured in nanometers (nm). The wavelength is related to the propagation velocity and
the frequency. (Also called lambda.)
wavelength growth
A type of growth in which all eight wavelengths are added to a single line before more lines are
added.
Wavelength Tracker monitoring capability
Wavelength Tracker monitoring capability is a patented feature of 1830 PSS-36/PSS-32/PSS-
16/PSS-4 which allows for the tracking of wavelengths through the 1830 PSS-36/PSS-32/PSS-
16/PSS-4 network, and for the measuring of the wavelengths' optical power levels at certain
points along their paths.
WaveWrapper
WaveWrapper provides network management functions such as optical-layer performance
monitoring, error correction, and ring protection on a per-wavelength basis.
WDM
See "wave division multiplexing" (p. GL-32)
WDM demand
The termination points and signal type of a service that is to be carried by the WDM network.
WDM line
A contiguous series of spans terminated by a ROADM at each end. A WDM line can be a single
span or a series of spans joined by the in-line amplifiers (ILAs).
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GL-32
for definition.
8DG60888CAAA Release 3.6.0 and 3.6.1
1830 PSS-36/PSS–32/PSS-16/PSS-4
Issue 1 June 2011