In-Situ Measurement of Beam Divergence in a High Efficiency SNSPD Platform
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Quantum Physics arXiv:2605.08425 (quant-ph) [Submitted on 8 May 2026] Title:In-Situ Measurement of Beam Divergence in a High Efficiency SNSPD Platform Authors:Daniel W. Sorensen, Martin J. Stevens, Lynden K. Shalm, Dileep V. Reddy View a PDF of the paper titled In-Situ Measurement of Beam Divergence in a High Efficiency SNSPD Platform, by Daniel W. Sorensen and 3 other authors View PDF HTML (experimental) Abstract:We implement a time-of-flight imaging technique utilizing a differential-readout SNSPD to spatially resolve detection events in a fiber-coupled detector platform. We measure the spatial detection profiles for ultra-high numerical aperture fiber, standard single-mode fiber, and thermally-expanded core fiber (mode-field diameters 4.1{\mu}m, 10.4{\mu}m, 30{\mu}m respectively) in an active area surrounded by an all-dielectric optical stack designed for near-unity detection efficiency. We see no beam divergence in all but the smallest fiber optic modes. This contradicts previously-held beliefs that beam divergence during the detection process necessitates activate areas much larger than coupled optical modes, opening new paths toward smaller and better-optimized detectors. Comments: Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2605.08425 [quant-ph] (or arXiv:2605.08425v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2605.08425 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Daniel Sorensen [view email] [v1] Fri, 8 May 2026 19:33:42 UTC (4,580 KB) Full-text links: Access Paper: View a PDF of the paper titled In-Situ Measurement of Beam Divergence in a High Efficiency SNSPD Platform, by Daniel W. Sorensen and 3 other authorsView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph new | recent | 2026-05 References & Citations INSPIRE HEP NASA ADSGoogle Scholar Semantic Scholar export BibTeX citation Loading... BibTeX formatted citation × loading... Data provided by: Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer (What is the Explorer?) Connected Papers Toggle Connected Papers (What is Connected Papers?) Litmaps Toggle Litmaps (What is Litmaps?) scite.ai Toggle scite Smart Citations (What are Smart Citations?) Code, Data, Media Code, Data and Media Associated with this Article alphaXiv Toggle alphaXiv (What is alphaXiv?) Links to Code Toggle CatalyzeX Code Finder for Papers (What is CatalyzeX?) DagsHub Toggle DagsHub (What is DagsHub?) GotitPub Toggle Gotit.pub (What is GotitPub?) Huggingface Toggle Hugging Face (What is Huggingface?) ScienceCast Toggle ScienceCast (What is ScienceCast?) Demos Demos Replicate Toggle Replicate (What is Replicate?) Spaces Toggle Hugging Face Spaces (What is Spaces?) Spaces Toggle TXYZ.AI (What is TXYZ.AI?) Related Papers Recommenders and Search Tools Link to Influence Flower Influence Flower (What are Influence Flowers?) Core recommender toggle CORE Recommender (What is CORE?) Author Venue Institution Topic About arXivLabs arXivLabs: experimental projects with community collaborators arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs. Which authors of this paper are endorsers? | Disable MathJax (What is MathJax?)