E. P. Kon`kova

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The paper deals with possibility of mode structure control for light scattering in a twisted strip fiber by variation its space geometry. Unlike the known diffraction profiling, an approach is proposed based on control of fiber optic discontinuities caused by fiber twist. On the example of spiral pilling of a twisted strip we show the possibility of distribution changing for light scattering intensity on its output by changing of pilling parameters: radius and winding step. Fiber geometry alteration leads to the alteration for a number of optical modes. The increase of a bending radius and winding step of a fiber leads to the growth of the modes number. Regular optical fields and speckles are registered within this work. Gradual intensity change is observed (both, decrease and increase) from the beam centre to its edges.

Keywords: optical fields, speckles, fiber geometry modeling, optical discontinuities

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