Extruded single-mode high-index-core one-dimensional microstructured optical fiber with high index-contrast for highly nonlinear optical devices

We report the fabrication of a high-index-core one-dimensional microstructured optical fiber incorporating with high index-contrast layers, using extrusion technique for preform fabrication. Single mode guidance and a high effective nonlinearity of 260±30W−1km−1 were observed in the fiber at 1.55μm, highlighting the potential of such fibers for use in nonlinear optical devices.