Hollow core negative curvature fibre with layers of photoaligned optically anisotropic material

Abstract

A microstructured hollow core negative curvature fibre containing photoaligned layers of SD1 azo dye has been proposed and fabricated. The presence of SD1 azo dye in the fibre structure leads to a spectral shift of photonic bandgaps to longer wavelengths in accordance with the numerical results. After irradiation by external UV light the fibre exhibits a dependence of spectral shift of photonic bandgaps and amplitude change on guided light polarisation.

Low Loss Transmission in Negative Curvature Optical Fibers With Elliptical Capillary Tubes

“…These features make the negative curvature fiber highly advantageous with tremendous potential applications at wavelengths spanning from UV to mid IR [27][28][29][30][31]. This opens up numerous possibilities for potential applications such as data [14,17] and chalcogenide negative curvature fibers [32] with low optical loss in near and mid infrared respectively have already been demonstrated, which can come down further by replacing the circular capillaries with elliptical ones.…”