High-Bandwidth Lithium Niobate Electro-Optic Modulator at Visible-Near-Infrared Wavelengths

Lithium niobate on insulator is presented as a platform for active integrated photonics at visible-near-infrared wavelengths. An electro-optic modulator operating at 780 nm featuring an electrical 3-dB bandwidth of 35 GHz and a halfwave voltage of 2.82 V is demonstrated, enabling transmission of a 40 Gbit/s on-off keying signal.