The Performance Research Of The Alkoxy Phthalocyanine Pb/Polymer Composite Materials For Optical Limiting

Three derivatives of alkoxy phthalocyanine Pb were synthesized as optical limiting materials. The structures of products were characterized by means of IR,HNMR spectra and elementary analysis. And then , the phthalocyanine Pb / polymethy methacrylate(PMMA) were prepared. The absorption spectrum of these composite materials between 200-800nm were measured to determine their Q-bands ,and they were found having good third nonlinear optical properties perhaps .Then the nonlinear reverse saturable absorption measurements of composite materials were performed with a frequency-doubled Q switched Nd:YAG laser with 8ns laser pulse at 532nm. The factors that affect the performance of reverse saturable absorption and optical limiting of the materials were discussed. A phenomenological model is used to describe optical limiting phenomena.