Integrated high-Q cascaded Fabry-Perot resonators based on lithium niobate Sagnac loop reflectors.

Summary: Imagine trying to trap light in a tiny, microscopic hall of mirrors. Scientists have built a better "light trap" using a special material called lithium niobate. By linking multiple loops that reflect light back and forth, they created a super-efficient system. This new design holds onto light much better than older versions, which is a big step forward for creating advanced optical chips, sensors, and lasers!