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Tele-Communication (Telecom) Terms Glossary and Dictionary
Overfill
Overfill refers to the condition in telecommunications that prevails when the numerical aperture or the beam diameter of an optical source, such as a laser, light-emitting diode, or optical fiber, exceeds that of the driven element, e.g., an optical fiber core. In optical communications testing, overfill in both numerical aperture and mean diameter is usually required.
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