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Coating concentricity

 The coating concentricity defines the relative position of the coating with respect to the glass in an optical fiber offering a clear indication of how well centred is the fiber within the coating material. A better coating concentricity means that the mechanical protection the coating offers to the optical fiber is higher. Although the coating concentricity in a fiber is generally less important than the core-cladding concentricity, if the coating concentricity is so poor that fiber glass is too near to the surface of the coating, then corrosive agents and water may attack the glass with the result of a weaker fiber. Bad coating concentricity is also undesirable in applications where the fiber is coiled as it could introduce irregular levels of stress into the fiber, leading to higher losses, lower polarization extinction ratio PER performance and a shorter lifetime.

All Fibercore's fibers are exhaustively tested to ensure they pass specifications and comply with with the industry standards for coating concentricity.

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