Hamburg 2009 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 56: Poster IV
Q 56.51: Poster
Donnerstag, 5. März 2009, 16:30–19:00, VMP 9 Poster
Single photon downconversion into the telecom band — •Helge Rütz1, Sebastian Zaske1, Georgina A. Olivares-Renteria2,3, Giovanna Morigi3, and Christoph Becher1 — 1Fachrichtung 7.3 (Technische Physik), Universität des Saarlandes, Campus E2.6, 66123 Saarbrücken — 2Center for Quantum Optics and Quantum Information, Departamento de Física, Universidad de Concepción, Casilla 160-C, Concepción, Chile — 3Grup d’Optica, Departament de Fisica, Universitat Autonoma de Barcelona, 08193 Bellaterra, Spain
Efficient single photon transmission in future quantum networks requires wavelengths in the low loss band of optical fibers around 1550 nm. However, the vast majority of single photon sources realized to date have emission wavelengths in the red or near-infrared spectral region (∼ 600-1000 nm). We here propose an experimental scheme for nonlinear downconversion of single photons emitted from an SiV center in diamond (738 nm) into the telecom band around 1550 nm. This is accomplished by difference frequency mixing with a strong cw signal wave at 1410 nm in a Ti-indiffused PPLN waveguide crystal. Theoretical considerations show that this process should allow for efficient and, in principle, noise free conversion between the pump and idler fields [1]. We study the conversion efficiency of the process and its quantum noise properties. To this end we include quantum noise sources using Heisenberg-Langevin equations. Finally we analyze the feasibility of the proposed scheme for realistic experimental parameters.
[1] Z. Y. Ou, Phys. Rev. A 78, 023819 (2008)