Guided-wave photonics for narrowband polarization entanglement

Details Guided-wave photonics for narrowband polarization entanglement Guided-wave photonics for narrowband polarization entanglement

2011-11-24

arxiv.org/abs/1111.5683v1

Physics

Quantum Physics

5 figures

Scientific paper

We report on a general entangling scheme, based on a birefringent delay line, capable of creating any pure polarization entangled state. We apply this scheme to a two-photon source built around a high efficiency type-0 non-linear integrated waveguide producing telecom photon pairs. The use of a phase-shifted fiber Bragg grating filter having a bandwidth as narrow as 540 MHz, and additional standard telecommunications components permits achieving a near-perfect entanglement quality associated with a very high brightness, comparable to that of time-bin sources. Such a scheme and source could be used in quantum information applications requiring narrowband photons, especially those involving the manipulation of entanglement via quantum memories and repeaters.

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