Nanostructured optical fiber by the sol-gel process in the SiO2–ZrO2 system

A SiO2–ZrO2 nanostructured optical fiber developed using the chemical sol-gel method is fabricated and its waveguiding properties are studied. The refractive index difference between the core and the cladding is 0.021 for a (30%ZrO2–70%SiO2) molar core composition. Illumination of the fiber with a supercontinuum source (350–1750nm) shows that the light is guided over this entire range. The measured attenuation losses are 0.7dB∕m at a 1064nm wavelength and the calculated cutoff wavelength is 714nm.