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FM: Fall Meeting

FM 86: Poster: Secure Communication & Computation

FM 86.6: Poster

Donnerstag, 26. September 2019, 16:30–18:30, Tents

Spectral Characterization of Photon Pairs for Quantum Key Distribution — •Erik Fitzke, Daniel Hofmann, Till Dolejsky, Oleg Nikiforov, and Thomas Walther — TU Darmstadt, Institute of Applied Physics, 64289 Darmstadt

We are developing a QKD system with energy-time entangled photon pairs around 1550 nm. The system will later be integrated in a standard telecommunication network. Our system requires characterization of the spectra of the emitted photon pairs and of the influence of transmission through several kilometers of telecommunication fiber. Thus, we compare different methods of analysis such as a grating spectrograph, the arrival time shift due to chromatic dispersion or autocorrelation function measurement. Results of the different approaches with photon pairs from SPDC will be presented.