The optical properties of corona poled NDA and a newly synthesized CNDA doped PMMA films were investigated with in situ second-harmonic generation (SHG) measurement and absorption measurement. Optimum corona poling temperatures of these polymeric films were found lower than glass transition temperatures of the materials and the second-order nonlinear susceptibility χ(2) of CNDA/PMMA is improved compared with that of NDA/PMMA. The molecular hyperpolarizability β of the CNDA was estimated to be about 146×10-30 esu from the measured absorbance and χ(2). The relaxation of SHG intensity of CNDA/PMMA was slower than that of NDA/PMMA.