2013/09/10 by T. Guerreiro, Thiago Guerreiro, A. Martin +9 · 4 citations
Computer Science · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Coupling (piping) #Degenerate energy levels #Materials science #Mechanical and Optical Resonators #Optics #Optoelectronics #Photon #Physics #Quantum #Quantum Information and Cryptography #Quantum computer #Quantum entanglement #Quantum key distribution #Quantum mechanics #Quantum network #Quantum optics #Spontaneous parametric down-conversion #quant-ph
paper · pdf · doi:10.1364/oe.21.027641
published as Optics express 21 (23), 27641-27651 (2013)
arxiv created 2013/09/10 · openalex publication_date 2013/11/04 · arxiv updated 2014/09/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Multi-photon and quantum communication experiments such as loophole-free Bell tests and device independent quantum key distribution require entangled photon sources which display high coupling efficiency. In this paper we put forward a simple quantum theoretical model which allows the experimenter to design a source with high pair coupling efficiency. In particular we apply this approach to a situation where high coupling has not been previously obtained: we demonstrate a symmetric coupling efficiency of more than 80% in a highly frequency non-degenerate configuration. Furthermore, we demonstrate this technique in a broad range of configurations, i.e. in continuous wave and pulsed pump regimes, and for different nonlinear crystals.