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Integrated frequency shifter in periodically poled lithium tantalate waveguide

Integrated frequency shifter in periodically poled lithium tantalate waveguide

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A frequency shifting device is fabricated and tested in a ferroelectric waveguide in a low-photorefractivity crystal. Periodic poling for quasi-phase-matching and channels for operation in the near-infrared C-band were obtained in congruent lithium tantalate, demonstrating for the first time both wave confinement and two-stage parametric conversion in such waveguides.

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