A method for making a cross-linked polymer network is disclosed herein. A mixture is formed of i) an electro-optic chromophore, ii) any of a cross-linkable monomer or a cross-linkable oligomer, and iii) an initiator in a solvent. Poling of the electro-optic chromophore is initiated by exposing the mixture to an electric field. While the mixture is being exposed to the electric field, the mixture is subjected to ultraviolet light or heat to initiate cross-linking of the any of the cross-linkable monomer or the cross-linkable oligomer to form a matrix of the cross-linked polymer network.