Prieto Blanco, XesúsMontero Orille, CarlosLiñares Beiras, JesúsGonzález Núñez, HéctorBalado Souto, Daniel2023-02-222023-02-222022X. Prieto-Blanco, C. Montero-Orille, J. Liñares, H. González-Núñez and D. Balado, "Quantum Projectors Implemented With Optical Directional Couplers in Ion-Exchanged Glasses," in Journal of Lightwave Technology, vol. 40, no. 23, pp. 7676-7684, 1 Dec.1, 2022, doi: 10.1109/JLT.2022.31892060733-8724http://hdl.handle.net/10347/30194Ion-exchanged glass as a platform for quantum photonics is proposed. Quantum projectors are implemented with integrated optical directional couplers fabricated by ion-exchange K+/Na+ in soda-lime glass. We consider devices composed of concatenated directional couplers which implement N-dimensional quantum projective measurements, and concomitantly the production of 1-qudit states. The fundamental units of these devices are 2 × 2 directional couplers that are experimentally studied in order to obtain, through an optical characterization, empiric relationships between fabrication and optical parameters of such couplers. Likewise, a two-dimensional quantum projector is demonstrated so that projective measurements are obtained for the states of bases X (diagonal) and Y (circular)engThis work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/Atribución 4.0 Internacionalhttp://creativecommons.org/licenses/by/4.0/Integrated quantum passive elementsIntegrated quantum projective metersIon-exchanged glass platformjournal article10.1109/JLT.2022.31892061558-2213open access