Mainz 2017 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 2: Quantum Communication I

Q 2.8: Talk

Monday, March 6, 2017, 16:30–16:45, P 3

Conversion of single photons from a trapped ⁴⁰Ca⁺-ion to the telecom range — •Pascal Eich, Matthias Bock, Matthias Kreis, Stephan Kucera, Jan Arenskötter, Christoph Becher, and Jürgen Eschner — Universität des Saarlandes, Experimentalphysik, Campus E2.6, 66123 Saarbrücken

A key ingredient for quantum networks is the controlled generation and distribution of photons as carriers of quantum information, in order to establish the communication between atomic network nodes. For long-range communication, the need for quantum frequency conversion of such photons from atomic wavelengths into the low-fiber-loss telecom range arises.

We generate triggered, polarization-controlled single photons at 854 nm on the P_3/2 ↔ D_5/2 transition of a single trapped ⁴⁰Ca⁺-ion, and investigate their conversion to the telecom O-band at 1312 nm via difference-frequency generation in a nonlinear waveguide. We study the single-photon character as well as the polarization of the photons before and after the conversion process.