FRESNEL FIBRE AND LENS

摘要

A fresenel zoned microstructured optical fibre is described. The fibre is constructed of concentric zones, each zone being defined by discontinuities in the refractive index. The refractive index within each zone may either be constant or may vary, for example each zone being a section of a parabola or hyperbola. The fibre may be used as a lens, for example for coupling light between fibres with different core sizes. <IMAGE> <IMAGE>