Rostock 2019 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 41: Poster: Quantum Optics and Photonics II

Q 41.26: Poster

Wednesday, March 13, 2019, 16:15–18:15, S Fobau Physik

All-fiber source for time-bin entangled photon pairs at 1550 nm — Maximilian Tippmann, Oleg Nikiforov, Erik Fitzke, and •Thomas Walther — TU Darmstadt, Institute for Applied Physics, 64289 Darmstadt

We are working on a system for quantum key distribution in commercial telecommunication networks. One of our goals is to develop a robust fiber-based photon pair source for entanglement-based protocols. We present our recent progress of the construction of an all-fiber, frequency-doubled EDFA system for the creation of photon pairs at 1550 nm. The system consists of a stabilized laser seeding a fourier-limited pulsed first amplifier, a second amplifier stage and a frequency conversion module. This system was developed to enhance the capabilities of our QKD system to meet the challenges of the planned field test in a metropolitan network.