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Polymer waveguides with optimized overlap integral for modal dispersion phase-matching



Applied Physics Letters 70 (1997), No.25, pp.3347-9
ISSN: 0003-6951
ISSN: 1077-3118
Journal Article
Fraunhofer HHI ()
dielectric polarisation; glass transition; nonlinear optical susceptibility; nonlinear optics; optical harmonic generation; optical polymers; optical waveguides; polymer waveguides; optimized overlap integral; modal dispersion phase-matching; second harmonic generation; poled polymer waveguide geometries; nonlinear optical core; side-chain polymers; glass transition temperatures; nonlinear optical coefficient; overlap integral; conversion efficiencies

Modal dispersion phase-matched second harmonic generation is demonstrated in new poled polymer waveguide geometries with a nonlinear optical core consisting of two side-chain polymers with different glass transition temperatures. After poling above and between the respective glass transitions, the sign of the nonlinear optical coefficient is reversed in the two polymers, thereby improving the overlap integral. Conversion efficiencies up to 7%/W cm2 were achieved in the first experiments.