SAMOP 2023 – scientific programme

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QI: Fachverband Quanteninformation

QI 12: Integrated Photonics I (joint session Q/QI)

QI 12.2: Talk

Tuesday, March 7, 2023, 11:30–11:45, E001

Duty cycle errors in periodically poled LiNbO₃ waveguides — •Sebastian Brauner, Christof Eigner, Harald Herrmann, Laura Padberg, and Christine Silberhorn — Paderborn University, Integrated Quantum Optics,Institute for Photonic Quantum Systems (PhoQS), Warburgerstr. 100, 33098 Paderborn, Germany

Photon pair generation and quantum frequency conversion are fundamental in quantum communication. Waveguides and specifically tailored quasi-phase matching have shown an amazing potential for future quantum communication technologies, which established material platforms as LiNbO₃ are about to explore. However, one often observes deviations from the expected performance, i.e. a low efficiency and distorted spectral phase-matching curves. We attribute these distortions to imperfections of the period poling. To gather a profound understanding, how such imperfections impact on the device performance, we conduct theoretical and experimental studies how duty cycle errors affect the conversion characteristic.