Low-loss and polarization-insensitive double-tip edge coupler with etched facet on a lithium niobate on insulator platform.

In this Letter, we propose and demonstrate a low-loss and polarization-insensitive edge coupler based on an etched facet double-tip inverse taper structure in lithium niobate on insulator (LNOI) across the C- and L-bands. Using a simple dry etching p…

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