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Q: Fachverband Quantenoptik und Photonik
Q 5: Quantum Technologies I
Q 5.4: Vortrag
Montag, 14. März 2022, 14:45–15:00, Q-H13
Fiber-coupled plug-and-play heralded single-photon source based on Ti:LiNbO3 and polymer technology — •Christian Kießler1, Harald Herrmann1, Hauke Conradi2, Moritz Kleinert2, and Christine Silberhorn1 — 1Paderborn University, Integrated QuantumOptics, Institute of Photonic Quantum Systems (PhoQS), Warburger Str. 100, 33098 Paderborn — 2Fraunhofer HHI, Einsteinufer 37, 10587 Berlin
The large amount of research in quantum technology has led to much progress in this field. Nevertheless, many of the experimental setups in the laboratories are very large, expensive and not robust. In order for quantum technology to take the next step and follow a success story like microelectronics, it is necessary to convert these complex meter-sized systems into millimeter-sized chips. This transition reduces size and cost, improves robustness and reproducibility and opens up the possibilty for future commercialization.
Here, we present the first chip-size plug-and-play heralded single photon source (HSPS) module based on Ti:LiNbO3 and Polymer technology. A SPDC process in a periodicly-poled Ti:LiNbO3 waveguide with a pump wavelength of 532 nm leads to signal and idler of 810 nm and 1550 nm. The chip has a size of 2 × 1 cm2 and is fully fibercoupled with one pump input fiber and two output fibers for seperated signal and idler. Additional components like optical filters and heaters are integrated within the module.
For 1 µ W pump power we can achieve a heralded second-order correlation function of gh(2)(0)<0.07 with a heralding efficiency of ηh=4 %.