Microresonator-based electro-optic dual frequency comb

Abstract Microresonator based dual frequency combs offer an integrated photonic solution to a wide range of technological challenges, including spectroscopy, finding, material characterization and hyperspectral imaging. These applications require high level mutual coherence between combs, but achieving such stability can be demanding. Here we experimentally demonstrate that comb generation exploiting the rich structure nonlinear electro-optic tensor in lithium niobate generate ultra-stable with two naturally having orthogonal polarizations. We theoretically explore application our technique from far infrared (IR) ultraviolet (UV). Our have relative linewidths as low ~400 μHz, no stabilization or post-processing methods.