Principle of Optical Cable Outer Sheath
The outer sheath is the outermost protective jacket of a cable, acting as the primary defense mechanism for the conductors and insulation it encases. Sheathing has three core values for use in fiber optic design: Protect the fiber. They have a central core surrounded by a concentric cladding with slightly lower (by ≈ 1%) refractive index. Optical fibers are typically made of silica with index-modifying dopants such as GeO 2.
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