{
  "abstract": "We demonstrate a fully fibre-integrated source of broadband polarisation-entangled photon pairs at telecom wavelengths based on a commercially available Zn-indiffused MgO:PPLN ridge waveguide incorporated within a Sagnac interferometer. Operating across the full degenerate SPDC spectrum using pump-suppression filtering only, the source exhibits a measured bandwidth of approximately 67 nm. Strong non-classical correlations are observed, with an average two-photon interference visibility of 96.9 +/- 0.2 %, a fidelity to the Phi + Bell state of 78.1 %, and a CHSH Bell parameter of S = 2.501 +/- 0.005. We further explore the effect of increasing source brightness on Bell-state performance, revealing the limitations of accidental-corrected metrics in high-flux operating regimes.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.23499",
  "author_total": 10,
  "authors": [
    {
      "name": "Peter Iveson"
    },
    {
      "name": "Paolo L. Mennea"
    },
    {
      "name": "Goronwy Tawy"
    },
    {
      "name": "Rex H. S. Bannerman"
    },
    {
      "name": "Noe Palomar-Davidson"
    },
    {
      "name": "Greg Blanchard-Emmerson"
    },
    {
      "name": "Patrick M. Ledingham"
    },
    {
      "name": "Peter G. R. Smith"
    },
    {
      "name": "James C. Gates"
    },
    {
      "name": "Corin B. E. Gawith"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/aa74t9c7pqznk.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.23499",
  "fulltext_url": null,
  "id": "aa74t9c7pqznk",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.23499",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "quant-ph"
    ],
    [
      "openalex",
      "1702|Quantum Information and Cryptography"
    ]
  ],
  "openalex": "W7222924394",
  "pdf_url": "https://arxiv.org/pdf/2610.23499",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-16",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/aa74t9c7pqznk.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:30:32Z",
      "native_id": "2610.23499",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.23499"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "A Fibre-Integrated SPDC Heralded Single-Photon Source Using Zn-Indiffused PPLN Ridge Waveguides at Telecom Wavelengths",
  "title_text": "A Fibre-Integrated SPDC Heralded Single-Photon Source Using Zn-Indiffused PPLN Ridge Waveguides at Telecom Wavelengths",
  "type": "preprint",
  "updated_at": "2026-11-04T15:20:50Z",
  "url": "https://research.draconitic.com/paper/aa74t9c7pqznk",
  "venue": "arXiv",
  "versions": []
}