Graded Index Chalcogenide Fibers with Nanostructured Core

Fabrication of graded index (GRIN) fibers is for a long time limited to ion-exchange, modified chemical vapour deposition (MCVD) or other techniques. Recently, the nanostructuring an all-solid core in has proven be versatile and low cost alternative production gradient optical fibers. Herein, high purity chalcogenide glasses Ge-As-Se glass system, synthesized in-house, are used stacking drawing nanostructured GRIN designed using Maxwell-Garnett effective medium theory, simulated annealing genetic algorithms. The successful generation supercontinuum spanning mid-infrared from 3 6 μm, pumping at central wavelength 4 μm Optical Parametric Oscillator with femtoseconds pulses, also reported.