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SAMOP 2023 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 42: Poster III

Q 42.8: Poster

Wednesday, March 8, 2023, 16:30–19:00, Empore Lichthof

Fiber-coupled plug-and-play heralded single photon source based on Ti : LiNbO3 and polymer technology — •Christian Kießler1, Hauke Conradi2, Moritz Kleinert2, Viktor Quiring1, Harald Herrmann1, and Christine Silberhorn11Paderborn University, Integrated Quantum Optics, Institute of Photonic Quantum Systems (PhoQS), Warburger Str. 100, 33098 Paderborn — 2Fraunhofer HHI Berlin, Einsteinufer 37, 10587 Berlin

A reliable, but cost-effective generation of single-photon states is key for practical quantum communication systems. Requirements like affordability, stability, miniaturized design and fiber compatibility are essential for these sources.
Here, we present the first chip-size fully integrated fiber-coupled Heralded Single Photon Source (HSPS) module based on a hybrid integration of Lithium-Niobate into a polymer board. A spontaneous parametric down conversion (SPDC) process with a pump wavelength of 532  nm leads to signal and idler of 810  nm and 1550  nm. The module has a size of (2 × 1)  cm2 and is fully fibercoupled with one pump input fiber and two output fibers for separated signal and idler. We measure a heralded second-order correlation function of gh(2)=0.05 with a heralding efficiency of ηh=4.5  % at low pump powers.

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