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Efficient Second Harmonic Generation (SHG) has been a continuing goal for not only frequency conversion but also for cascading effects such all-optical switching, spatial solitary waves, etc. To date high efficiencies have been demonstrated only in ferroelectric crystals However, some poled polymers have even higher nonlinear coefficients and offer ease of processing and low cost fabrication. Nevertheless, the efficiencies reported for poled polymers have never achieved expectations. We demonstrate phase-matched SHG in a channel waveguide made of 4-dimethylamino-4′-nitrostilbene (DANS) side-chain polymer. Our SHG figure of merit η=P2ω/(PωL)2 = 10%/W-cm2 is the highest non-resonant value reported for polymers and is comparable to those of inorganic crystals.
© 1996 IEEE
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