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

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Abstract

We report on the dispersion of the third-order nonlinear susceptibility (χ(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 χ(3) and obtain a large nonlinear coefficient, 2×1013esu, at 1550nm. 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.

© 2009 Optical Society of America

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