Abstract

Sources of non-classical light are central to many quantum optics and quantum information experiments. Ideally their stability, compactness, efficiency, and wavelength tunability would rival those of classical laser sources. Here we present a compact source of photon pairs and squeezed light based on efficient parametric down conversion in a triply resonant whispering-gallery resonator (WGR) made out of lithium niobate [1]. Prominent applications for this type of source are proposed quantum repeater schemes, which enhance long-distance quantum communication. Here non-degenerate photon pairs are required where one photon resides at a telecom wavelength to be sent over the communication link and its partner photon matches the resonance of the storage medium.

© 2015 IEEE