Chen, Ruiqi, Charlton, Martin and Lagoudakis, Pavlos
Chi 3 dispersion in planar tantalum pentoxide waveguides in the telecommunications window
Optics Letters, 34, (7), . (doi:10.1364/OL.34.001135).
We report on the dispersion of the third-order nonlinear susceptibility ("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, 2×10^-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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