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Opt Lett. 2009 Apr 1;34(7):1135-7.

Chi 3 dispersion in planar tantalum pentoxide waveguides in the telecommunications window.

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  • 1School of Electronics and Computer Science, University of Southampton, Southampton, UK. rickeychen@gmail.com


We report on the dispersion of the third-order nonlinear susceptibility (chi(3) or "Chi 3") in planar Ta2O5 waveguides in the telecommunications spectral window. We utilize the observation of third-harmonic generation under ultrashort pulsed excitation as a reference-free characterization method of chi(3) and obtain a large nonlinear coefficient, 2x10(-13) esu, at 1550 nm. Our observation of efficient third-harmonic generation in Ta2O5 waveguides in the telecoms window reveals the potential of this material system in high-speed integrated nonlinear optical switches.

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