Thin-Film Lithium Niobate Modulator for a Flat Frequency-Response over 110 GHz Bandwidth with Integrated Electro-Optic Frequency-Domain Equalizer

We demonstrated an optical modulator with an ultra-flat frequency-response over 110 GHz by using a thin-film lithium niobate platform and the integration of an electro-optic frequency-domain equalizer. The half-wave voltage was 2.4 V, and we measured an extinction ratio exceeding 40 dB.