21 June 2015 High-angle light scattering to determine the optical fiber core
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The aim of the paper is to discuss the possibility of non-invasive sizing of a step-index optical fiber with the use of a beam of light of low temporal coherence. For this purpose we examine the angular profile of light scattered from the fiber at a high angle. The scattered pattern comprises chiefly two coupled, twin rainbows and depends on the fiber physical characteristics, i.e. its dimensions, shape, and refractive index profile. In order to find a causal link between the scattering pattern and the fiber morphology, a spectral analysis (Fast Fourier Transform, FFT) is performed over the scattering intensity. From the spectral data, the core diameter of a step-index optical fiber is extracted inversely.
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Grzegorz Świrniak, Grzegorz Świrniak, } "High-angle light scattering to determine the optical fiber core", Proc. SPIE 9526, Modeling Aspects in Optical Metrology V, 95261D (21 June 2015); doi: 10.1117/12.2184482; https://doi.org/10.1117/12.2184482

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