Waveguide-based OPO source of entangled photon pairs
Waveguide-based OPO source of entangled photon pairs
In this paper, we present a compact source of narrow-band energyā€“time-entangled photon pairs in the telecom regime based on a Ti-indiffused periodically poled lithium niobate (PPLN) waveguide resonator, i.e. a waveguide with end-face dielectric multi-layer mirrors. This is a monolithic doubly resonant optical parametric oscillator (OPO) far below threshold, which ā€¦