Fluorine and sodium depletion followed by refractive index modification imprinted on fluorophosphate glass surface by thermal poling

Thermal poling using microstructured electrodes on oxyfluoride glasses have been investigated and the impact optical properties was evaluated. A micrometer refractive index modification based sodium fluorine migration has evidenced, through creation of a layer with different chemical composition as compared to original glass. Topological modifications after treatment are discussed. For first time, we described negative ion in direction cathode from glass network. Na F led richer oxides strong contrast + 0.06 imprinted structures.