Metal strips as heaters for dense integration in thin film lithium niobate integrated circuits

Platinum strips with varying width and length are used to induce optical phase shifts in lithium niobate-on-insulator waveguide structures. Our measurements show the potential of thermo-optic phase shifters as low footprint components. By comparing them directly to electro-optic phase shifters we are able to show better performance in terms of stability and for sub-MHz switching.

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