The article proposes a new approach to highly efficient second-order nonlinear optical (NLO) materials, which involves the use of cross-linkable, hyperbranched chromophore-containing oligomers as a macromolecular dopant to formulate NLO materials suitable for device development. This unique approach is designed with the following consideration and unique feature. A hyperbranched oligomer should have better chain mobility in host polymers than a high molecular weightlinear polymer, which should facilitate the chromophore orientation during the poling process.