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Attenuation constant
In telecommunication, the term attenuation constant has the following meanings:
1. The real part of the propagation constant in any electromagnetic propagation medium.
Note 1: The attenuation constant is usually expressed as a numerical value per unit length.
Note 2: The attenuation constant may be calculated or experimentally determined for each medium.
2. For a particular propagation mode in an optical fiber, the real part of the axial propagation constant[?].
Source: from Federal Standard 1037C
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