core-cladding concentricity error

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• Concentricity error — In an optical fiber, the concentricity error is the distance between the center of the two concentric circles that specify the cladding diameter and the center of the two concentric circles that specify the core diameter. The concentricity error… …   Wikipedia

• Ovality — In telecommunications and fiber optics, ovality or noncircularity is the degree of deviation from perfect circularity of the cross section of the core or cladding of the fiber. The cross sections of the core and cladding are assumed to a first… …   Wikipedia