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Researchers develop highly efficient ultrabroadband edge coupler

Thin-film lithium niobate (TFLN) is a versatile nanophotonic platform that has recently emerged. TFLN-based periodically poled lithium niobite (PPLN) devices outperform their legacy counterparts in both non-linear optical efficiency and device footprint due to their advantages of high optical confinement, enhanced light-matter interaction, and...