Musiał, AnnaŻołnacz, KingaSrocka, NicoleKravets, OlehGroße, JanOlszewski, JacekPoturaj, KrzysztofWójcik, GrzegorzMergo, PawełDybka, KamilDyrkacz, MariuszDłubek, MichałLauritsen, KristianBülter, AndreasSchneider, Philipp‐ImmanuelZschiedrich, LinBurger, SvenRodt, SvenUrbańczyk, WacławSęk, GrzegorzReitzenstein, Stephan2020-11-162020-11-162020-05-11https://depositonce.tu-berlin.de/handle/11303/11948http://dx.doi.org/10.14279/depositonce-10837A user‐friendly, fiber‐coupled, single‐photon source operating at telecom wavelengths is a key component of photonic quantum networks providing long‐haul, ultra‐secure data exchange. To take full advantage of quantum‐mechanical data protection and to maximize the transmission rate and distance, a true quantum source providing single photons on demand is highly desirable. This great challenge is tackled by developing a ready‐to‐use semiconductor quantum‐dot‐based device that launches single photons at a wavelength of 1.3 µm directly into a single‐mode optical fiber. In the proposed approach, the quantum dot is deterministically integrated into a nanophotonic structure to ensure efficient on‐chip coupling into a fiber. The whole arrangement is integrated into a 19ʺ compatible housing to enable stand‐alone operation by cooling via a compact Stirling cryocooler. The realized source delivers single photons with a multiphoton events probability as low as 0.15 and a single‐photon emission rate of up to 73 kHz into a standard telecom single‐mode fiber.en530 PhysikIII‐V semiconductor epitaxial quantum dotsfiber elements design and fabricationphoton statisticsquantum communicationquantum‐dot‐based devicesquantum opticssingle‐photon sourcesArticle2020-11-022511-9044