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Proceedings Paper

Measurement And Analysis Of Secondary Coated Optical Fiber Concentricity
Author(s): Heikki K. Saari; Jyrki Laitinen
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Paper Abstract

The concentricity of a primary and secondary fiber coating can be measured using a laser light forward scattering method. This paper presents a ray-tracing method for calculation of fiber secondary coating eccentricity from the measured intensity patterns. Assuming, that the variation of coating diameters is ±3.0%, variation of the refractive indices is ±0.01, the measuring accuracy of intensity maxima is ±0.3 degrees and eccentricity of primary coating is less than 3.3μpm, then the eccentricity of secondary coating can be measured with an accuracy of ±0.7 μm, when the diameter of the fiber secondary coating is 250μm, the diameter of the primary coating is 205 μm and the diameter of the fiber cladding is 125 μm. The model, derived here, was tested by measuring forward scattered intensity patterns obtained using either HeNe-laser (λ=633 nm) or semiconductor laser diode (λ=780 nm) light. The measurements confirmed that the new model can be used to give the concentricity error of secondary fiber coating with the estimated accuracy.

Paper Details

Date Published: 21 September 1988
PDF: 7 pages
Proc. SPIE 0949, Fibre Optics '88, (21 September 1988); doi: 10.1117/12.947525
Show Author Affiliations
Heikki K. Saari, Technical Research Centre of Finland (Finland)
Jyrki Laitinen, Technical Research Centre of Finland (Finland)

Published in SPIE Proceedings Vol. 0949:
Fibre Optics '88
Lionel R. Baker, Editor(s)

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