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Low loss waveguides and waveguide elements in chi(3)-polymers

: Bräuer, A.; Pertsch, T.; Gabler, T.; Hörhold, H.

Righini, G.C.; Najafi, S.I.; Jalali, B. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Integrated optics devices II : 28-30 January 1998, San Jose, California
Bellingham, Wash.: SPIE, 1998 (SPIE Proceedings Series 3278)
ISBN: 0-8194-2717-9
Conference "Integrated Optic Devices" <1998, San Jose/Calif.>
Conference Paper
Fraunhofer IOF ()
opto-optical switching; polymer; strip waveguide; waveguide device

Low loss optical waveguides (< 1 dB/cm) with extreme stability against pulsed optical intensity (up to 16 GW/cm) allowing for a nonlinear induced phase shift of >3 pi have been fabricated in a class of conjugated polymers, substituted poly(phenylene-vinylene) (PPV), which are promising candidates for demonstration of nonlinear switching in waveguide elements. The wavelength dependence of the nonlinear optical properties (nonlinear refractive index parameter n2 and the two-photon absorption coefficient alpha2) were measured with interferometer and spectral pulse broadening techniques. The nonresonant n2 values are several times 10(exp -14) cm2/W for the two PPV derivatives measured. Ultrafast nonlinear switching is demonstrated exploring purely electronics effects by using a semi-integrated nonlinear Mach-Zehnder interferometer and directional couplers.