Geiß, ReinhardReinhardGeißYounesi, MohammadrezaMohammadrezaYounesiMühlenstädt, JohannesJohannesMühlenstädtKäsebier, ThomasThomasKäsebierSetzpfandt, FrankFrankSetzpfandtSiefke, ThomasThomasSiefkePertsch, ThomasThomasPertschEilenberger, FalkFalkEilenberger2025-02-182025-02-182024https://publica.fraunhofer.de/handle/publica/4840472-s2.0-85216181067Lithium niobate is a popular material in integrated photonics due to its optical and electro-optic properties. It is used in low-loss waveguides for high-speed and high integration density photonic devices. This technology enables integration of various devices on a single chip for quantum technology and telecom applications. Here, we present waveguide devices such as modulators, micro-ring resonators and frequency converters having losses below 0.05 dB/cm. The challenges of wafer-scale fabrication will be discussed.enfalseconference paper