article published Christian Kießler author 44252 Hauke Conradi author Moritz Kleinert author Viktor Quiring author Harald Herrmann author 216 Christine Silberhorn author 26263 A reliable, but cost-effective generation of single-photon states is key for practical quantum communication systems. For real-world deployment, waveguide sources offer optimum compatibility with fiber networks and can be embedded in hybrid integrated modules. Here, we present what we believe to be the first chip-size fully integrated fiber-coupled heralded single photon source (HSPS) module based on a hybrid integration of a nonlinear lithium niobate waveguide into a polymer board. Photon pairs at 810 nm (signal) and 1550 nm (idler) are generated via parametric down-conversion pumped at 532 nm in the LiNbO3 waveguide. The pairs are split in the polymer board and routed to separate output ports. The module has a size of (2 × 1) cm^2 and is fully fiber-coupled with one pump input fiber and two output fibers. We measure a heralded second-order correlation function of g_h(2)=0.05 with a heralding efficiency of η_h=3.5% at low pump powers Optica Publishing Group2023 eng Atomic and Molecular Physicsand Optics 1094-408710.1364/oe.487581 3114 Kießler C, Conradi H, Kleinert M, Quiring V, Herrmann H, Silberhorn C. Fiber-coupled plug-and-play heralded single photon source based on Ti:LiNbO3 and polymer technology. <i>Optics Express</i>. 2023;31(14). doi:<a href="https://doi.org/10.1364/oe.487581">10.1364/oe.487581</a> @article{Kießler_Conradi_Kleinert_Quiring_Herrmann_Silberhorn_2023, title={Fiber-coupled plug-and-play heralded single photon source based on Ti:LiNbO3 and polymer technology}, volume={31}, DOI={<a href="https://doi.org/10.1364/oe.487581">10.1364/oe.487581</a>}, number={1422685}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Kießler, Christian and Conradi, Hauke and Kleinert, Moritz and Quiring, Viktor and Herrmann, Harald and Silberhorn, Christine}, year={2023} } Kießler, Christian, et al. “Fiber-Coupled Plug-and-Play Heralded Single Photon Source Based on Ti:LiNbO3 and Polymer Technology.” <i>Optics Express</i>, vol. 31, no. 14, 22685, Optica Publishing Group, 2023, doi:<a href="https://doi.org/10.1364/oe.487581">10.1364/oe.487581</a>. C. Kießler, H. Conradi, M. Kleinert, V. Quiring, H. Herrmann, C. Silberhorn, Optics Express 31 (2023). Kießler, Christian, Hauke Conradi, Moritz Kleinert, Viktor Quiring, Harald Herrmann, and Christine Silberhorn. “Fiber-Coupled Plug-and-Play Heralded Single Photon Source Based on Ti:LiNbO3 and Polymer Technology.” <i>Optics Express</i> 31, no. 14 (2023). <a href="https://doi.org/10.1364/oe.487581">https://doi.org/10.1364/oe.487581</a>. Kießler, C., Conradi, H., Kleinert, M., Quiring, V., Herrmann, H., &#38; Silberhorn, C. (2023). Fiber-coupled plug-and-play heralded single photon source based on Ti:LiNbO3 and polymer technology. <i>Optics Express</i>, <i>31</i>(14), Article 22685. <a href="https://doi.org/10.1364/oe.487581">https://doi.org/10.1364/oe.487581</a> C. Kießler, H. Conradi, M. Kleinert, V. Quiring, H. Herrmann, and C. Silberhorn, “Fiber-coupled plug-and-play heralded single photon source based on Ti:LiNbO3 and polymer technology,” <i>Optics Express</i>, vol. 31, no. 14, Art. no. 22685, 2023, doi: <a href="https://doi.org/10.1364/oe.487581">10.1364/oe.487581</a>. 466442023-08-23T07:20:06Z2023-08-23T07:25:37Z