Effect of Phase Noise on Electro-optic Frequency Combs Using Integrated Lithium Niobate Modulators

Electro-optic (EO) frequency combs have played a critical role in high-capacity optical communications, microwave photonics, and spectroscopy. These applications require EO frequency combs featuring good flatness and strong coherence, however, high phase noise severely degrades the performance of EO frequency combs. Here, we demonstrated an on-chip EO frequency comb generator based on thin-film lithium niobate modulators, and we analyzed the effect of phase noise on integrated EO frequency combs.