Bandwidth-voltage trade-off paradigm in low-loss LNOI electro-optic modulators, using equalizer configuration.

The ever-increasing demand for high-speed data communication has fueled the development of ultra-fast electro-optic modulators. Our proposed equalizer configuration in lithium niobate on insulator electro-optic (LNOI-EO) modulators offers a novel approach to the bandwidth-voltage trade-off. Using 3D simulations, we achieved an ultra-high bandwidth of 300 GHz, delivering more than three times enhancement compared to the conventional modulators with the same base modulator length and half-wave voltage of 4.4 V. The device design incorporates a crossing segment to ensure distortion-free modulated signals and a dual-layered electrode design to minimize interference. These modulators have excellent potential for future photonic integrated circuits, marking a new era of superior bandwidth-voltage trade-offs.