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1 Bulletin of the Polish Academy of Sciences. Technical Sciences

1 2011

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Evolution of the diffraction pattern during the transition from the near-field toward the far-field region

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Grabka M. , Pustelny S. , Wajnchold B. , Gawlik W. , Mergo P.

2011

tom Vol. 59, nr 4

389-393

In the paper we experimentally and theoretically analyze diffraction of light propagating through a microstructured optical fiber on the fiber end face. In the measurements the diffracting light is spatially inhomogeneous and the diffracting object is a solid-state core with a triangular shape. Application of optical system enables detailed experimental investigations of evolution diffraction pattern in the near-field region, in particular, rotation of the observed structure while departing from the fiber end. The experimental results are confirmed with theoretical simulations based on the theory of the Fresnel diffraction.