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In a polyconjugated main chain polymer strip waveguide the nonlinear, nonresonant refractive index n(2) was measured by monitoring the signal spectrum broadening due to self-phase modulation, The two photon absorption coefficient alpha(2) was obtained by calibrating the inverse transmission measurement. The nonlinear coefficients were determined to be n(2)=0.85 x 10(-14) cm(-2)/W and alpha(2)=0.08 cm/GW at a wavelength lambda=885.6 nm. The used polymer was poly[1,4-phenylene-1,2-di(phenoxyphenyl)vinylene]. The result is in good agreement with interferometer measurements. The material is suitable for all-optical switching. (C) 1997 American Institute of Physics

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Both, thermal and electronic optical nonlinearities are studied in semiconductor-doped glass (SDG) waveguides which are fabricated in commerciolly available sharp-cut filters by Csf-K+ ion exchange. The relaxation time in photodarkened substrates is measured to be 30ps. By means of a prism coupling set-up the saturation value of the nonlinear index change is dettrmined. Furthermore, a high stability dual-beam interferometer is presented for the measurement of both, thermal and electronic nodinear refractive index n, in planar waveguides. Conclusions about the application of SDG t o opto-optical switching are given.Thermische und elektronische optische Nichtlinearitaten in Wellenleitern, hergestellt durch Cs+-Kf-Ionenaustausch in halbleiterdotiertem Glas (kommerziell verfiigbar als Stcilkantenfilter) worden unt.ersucht. Die Relaxationszeit in durch Laserbestrahlung gealterten Proben betragt 30 ps. Nittels eines Prismenkopplers wird der Sattigungswert der lichtinduzierten Brechzahliinderung bestimmt. Weiterhin wird ein hochstabiles 2-Strahl-Interferometer zur Messung thermischer und elektronischer nichtlinearer Brechzahlanderungen in ebenm Wellenleitem vorgcstellt. SchluBfolgerungen bezuglich einer Anwendung halbleiterdotierter G l a m in opto-optischen Scheltern werden gezogen.

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