{"date_created":"2025-12-15T07:20:36Z","type":"journal_article","volume":33,"oa":"1","author":[{"first_name":"Silia","id":"63231","last_name":"Babel","full_name":"Babel, Silia","orcid":"https://orcid.org/0000-0002-1568-2580"},{"id":"61375","first_name":"Laura","last_name":"Bollmers","full_name":"Bollmers, Laura"},{"full_name":"Roeder, Franz","last_name":"Roeder","id":"88149","first_name":"Franz"},{"id":"63574","first_name":"Werner","full_name":"Ridder, Werner","last_name":"Ridder"},{"last_name":"Golla","full_name":"Golla, Christian","first_name":"Christian","id":"40420"},{"last_name":"Köthemann","full_name":"Köthemann, Ronja","first_name":"Ronja"},{"last_name":"Reineke","full_name":"Reineke, Bernhard","id":"29821","first_name":"Bernhard"},{"id":"216","first_name":"Harald","last_name":"Herrmann","full_name":"Herrmann, Harald"},{"full_name":"Brecht, Benjamin","orcid":"0000-0003-4140-0556 ","last_name":"Brecht","id":"27150","first_name":"Benjamin"},{"id":"13244","first_name":"Christof","last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083","full_name":"Eigner, Christof"},{"full_name":"Padberg, Laura","last_name":"Padberg","first_name":"Laura","id":"40300"},{"full_name":"Silberhorn, Christine","last_name":"Silberhorn","id":"26263","first_name":"Christine"}],"status":"public","department":[{"_id":"288"},{"_id":"623"}],"doi":"10.1364/oe.571605","language":[{"iso":"eng"}],"issue":"25","main_file_link":[{"url":"https://opg.optica.org/oe/fulltext.cfm?uri=oe-33-25-52729","open_access":"1"}],"publication":"Optics Express","citation":{"bibtex":"@article{Babel_Bollmers_Roeder_Ridder_Golla_Köthemann_Reineke_Herrmann_Brecht_Eigner_et al._2025, title={Ultrabright, two-color photon pair source based on thin-film lithium niobate for bridging visible and telecom wavelengths}, volume={33}, DOI={<a href=\"https://doi.org/10.1364/oe.571605\">10.1364/oe.571605</a>}, number={2552729}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Babel, Silia and Bollmers, Laura and Roeder, Franz and Ridder, Werner and Golla, Christian and Köthemann, Ronja and Reineke, Bernhard and Herrmann, Harald and Brecht, Benjamin and Eigner, Christof and et al.}, year={2025} }","mla":"Babel, Silia, et al. “Ultrabright, Two-Color Photon Pair Source Based on Thin-Film Lithium Niobate for Bridging Visible and Telecom Wavelengths.” <i>Optics Express</i>, vol. 33, no. 25, 52729, Optica Publishing Group, 2025, doi:<a href=\"https://doi.org/10.1364/oe.571605\">10.1364/oe.571605</a>.","ieee":"S. Babel <i>et al.</i>, “Ultrabright, two-color photon pair source based on thin-film lithium niobate for bridging visible and telecom wavelengths,” <i>Optics Express</i>, vol. 33, no. 25, Art. no. 52729, 2025, doi: <a href=\"https://doi.org/10.1364/oe.571605\">10.1364/oe.571605</a>.","apa":"Babel, S., Bollmers, L., Roeder, F., Ridder, W., Golla, C., Köthemann, R., Reineke, B., Herrmann, H., Brecht, B., Eigner, C., Padberg, L., &#38; Silberhorn, C. (2025). Ultrabright, two-color photon pair source based on thin-film lithium niobate for bridging visible and telecom wavelengths. <i>Optics Express</i>, <i>33</i>(25), Article 52729. <a href=\"https://doi.org/10.1364/oe.571605\">https://doi.org/10.1364/oe.571605</a>","chicago":"Babel, Silia, Laura Bollmers, Franz Roeder, Werner Ridder, Christian Golla, Ronja Köthemann, Bernhard Reineke, et al. “Ultrabright, Two-Color Photon Pair Source Based on Thin-Film Lithium Niobate for Bridging Visible and Telecom Wavelengths.” <i>Optics Express</i> 33, no. 25 (2025). <a href=\"https://doi.org/10.1364/oe.571605\">https://doi.org/10.1364/oe.571605</a>.","short":"S. Babel, L. Bollmers, F. Roeder, W. Ridder, C. Golla, R. Köthemann, B. Reineke, H. Herrmann, B. Brecht, C. Eigner, L. Padberg, C. Silberhorn, Optics Express 33 (2025).","ama":"Babel S, Bollmers L, Roeder F, et al. Ultrabright, two-color photon pair source based on thin-film lithium niobate for bridging visible and telecom wavelengths. <i>Optics Express</i>. 2025;33(25). doi:<a href=\"https://doi.org/10.1364/oe.571605\">10.1364/oe.571605</a>"},"_id":"63091","year":"2025","date_updated":"2026-01-07T11:28:35Z","intvolume":"        33","publication_identifier":{"issn":["1094-4087"]},"article_type":"original","publication_status":"published","abstract":[{"lang":"eng","text":"We present the design and characterization of a guided-wave, bright, and highly frequency non-degenerate parametric down-conversion (PDC) source in thin-film lithium niobate. The source generates photon pairs with wavelengths of 815 nm and 1550 nm, linking the visible wavelength regime with telecommunication wavelengths. We confirm the high quality of the generated single photons by determining a value for the heralded second-order correlation function as low as g_h^(2)=(6.7+/-1.1)*10^8-3). Furthermore, we achieve a high spectral brightness of 0.44·10pairs/(smWGHz) which is two orders of magnitude higher than sources based on weakly guiding waveguides. The shape of the PDC spectrum and the strong agreement between the effective and nominal bandwidth highlight our high fabrication quality of periodically poled waveguides. The good agreement between the measured and simulated spectral characteristics of our source demonstrates our excellent understanding of the PDC process. Our result is a valuable step towards practical and scalable quantum communication networks as well as photonic quantum computing."}],"article_number":"52729","user_id":"63231","publisher":"Optica Publishing Group","title":"Ultrabright, two-color photon pair source based on thin-film lithium niobate for bridging visible and telecom wavelengths"}