What do the terms 9/125, 50/125 and 62.5/125 refer to in regards fibre optic cables?
By
DAANET
These numbers refer to the ratio of the fibre optical core diameter to the cladding outer diameter in microns with the smaller number being the core value and the larger number being the cladding value.
Typical multimode cable types are 50/125µm and 62.5/125µm. Singlemode cables have a smaller core, with 9/125µm the most common.
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