title: Post-selection free, integrated optical source of non-degenerate, polarization entangled photon pairs.
abstract: We present an integrated source of polarization entangled photon pairs in the telecom regime, which is based on type II-phasematched parametric down-conversion (PDC) in a Ti-indiffused waveguide in periodically poled lithium niobate. The domain grating - consisting of an interlaced bi-periodic structure - is engineered to provide simultaneous phase-matching of two PDC processes, and enables the direct generation of non-degenerate, polarization entangled photon pairs with a brightness of B = 7 × 10(3) pairs/(s×mW×GHz). The spatial separation of the photon pairs is accomplished by a fiber-optical multiplexer facilitating a high compactness of the overall source. Visibilities exceeding 95 % and a violation of the Bell inequality with S = 2.57±0.06 could be demonstrated.
authors: Harald
authors: H
authors: Herrmann
authors: Xu
authors: X
authors: Yang
authors: Abu
authors: A
authors: Thomas
authors: Andreas
authors: A
authors: Poppe
authors: Wolfgang
authors: W
authors: Sohler
authors: Christine
authors: C
authors: Silberhorn