Abstract
The linear optical and second-order nonlinear optical (NLO) properties of an interpenetrating polymer network (IPN) have been investigated. For the poled and cured IPN samples, large second-order NLO coefficients, d33, were measured at 1.064 μm and 1.542 μm. The linear electro-optic coefficients, r33, were determined at various wavelengths. The opled and cured IPN samples showed no measurable decay of the second-order optical nonlinearity after being treated at 110°C for more than 1000 hours. This excellent long-term stability of the NLO property is ascribed to the novel interpenetrating crosslinked molecular structure of the IPN system.
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