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Q: Fachverband Quantenoptik und Photonik

Q 31: Poster: Quantum Optics and Photonics I

Q 31.86: Poster

Dienstag, 7. März 2017, 17:00–19:00, P OG1+2

Towards a PDC source at NIR wavelengths in a single-mode Rb:PPKTP waveguide — •Christof Eigner, Laura Padberg, Matteo Santandrea, Raimund Ricken, Helge Rütz, and Christine Silberhorn — Universität Paderborn, Integrierte Quantenoptik, Warburger Str. 100, D-33098 Paderborn

Parametric down conversion (PDC) is a well-established process for the generation of non-classical states and single photons. Especially PDC sources that emit in the visible and near-infrared (NIR) are highly attractive for quantum cryptography due to the possibility of low cost Silicon avalanche detection as well as possible coupling to ion traps. Realizing such a source in periodically poled potassium titanyl phosphate (PPKTP) waveguides permits to deploy high pump intensities because of the high damage resistance of the material and at the time allows to harness the potential of integrated optical circuitry.

Producing the rubidium exchanged PPKTP waveguides ourselves allows us to tailor the waveguide properties and apply specifically designed poling patterns. Here, we discuss our approach to manufacture single-mode waveguides in KTP in the NIR at 800 nm. Moreover, we present the current status of our PDC source for the generation of photon pairs in this wavelength regime.