Abstract
A second-order nonlinear thermoplastic epoxy phenolic resin (NLOPF) was synthesized by phenol, p-Nitoaniline, epoxy chloropropane and formaldehyde. The nonlinear optical (NLO) film was fabricated by spin-coating. Then it was poled in the electric field at room temperature. The orientations of the chromophores were fixed by the thermal-cross-linked structures. The second-order nonlinearity of the films was measured by simple reflection technique. The values of electro-optic coefficient (r33) of the films with different chromophore content were 2.32, 4.53, 6.78, 8.65, 10.42pm/V, respectively. They were stabilized around 95% of their initial values after 100h at 80°C.
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