Fiber-coupled plug-and-play heralded single photon source based on Ti:LiNbO 3 and polymer technology

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...

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Bibliographic Details
Published inOptics express Vol. 31; no. 14; p. 22685
Main Authors Kießler, Christian, Conradi, Hauke, Kleinert, Moritz, Quiring, Viktor, Herrmann, Harald, Silberhorn, Christine
Format Journal Article
LanguageEnglish
Published United States 03.07.2023
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Summary: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 LiNbO waveguide. The pairs are split in the polymer board and routed to separate output ports. The module has a size of (2 × 1) cm and is fully fiber-coupled with one pump input fiber and two output fibers. We measure a heralded second-order correlation function of (2)=0.05 with a heralding efficiency of =3.5 at low pump powers.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.487581