ATIS Telecom Glossary
Saturday, February 25, 2017
Using the ATIS Telecom Glossary
Annex A: Informative References
The wavelength interval over which the magnitude of all spectral components is equal to or greater than a specified fraction of the magnitude of the component having the maximum value.
In optical communications applications, the usual method of specifying spectral width is the full width at half maximum. This method may be difficult to apply when the spectrum has a complex shape. Another method of specifying spectral width is a special case of root-mean-square deviation where the independent variable is wavelength,
) is a suitable radiometric quantity.
relative spectral width
, is frequently used where
is obtained according to note 1, and
is the center wavelength.
These definitions were prepared by
ATIS Committee PRQC
For more information on the work related to these definitions,
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and the ATIS