{
  "annotation_id": "9250a6a2-aab0-41f8-bf5b-75b9717ff25e",
  "date_created": "2026-03-02T18:02:10.012000Z",
  "date_modified": "2026-03-02T18:02:10.012000Z",
  "file_hash": "15e6e6a21a0375531d40ce006315004522b29ba6db8e4360f0e710864c5829aa",
  "private": false,
  "record": {
    "abstract": "We investigate the coupling efficiency of parametric downconversion light\n(PDC) into single and multi-mode optical fibers as a function of the pump beam\ndiameter, crystal length and walk-off. We outline two different theoretical\nmodels for the preparation and collection of either single-mode or multi-mode\nPDC light (defined by, for instance, multi-mode fibers or apertures,\ncorresponding to bucket detection). Moreover, we define the mode-matching\ncollection efficiency, important for realizing a single-photon source based on\nPDC output into a well-defined single spatial mode. We also define a multimode\ncollection efficiency that is useful for single-photon detector calibration\napplications.",
    "arxiv_id": "quant-ph/0408015",
    "authors": [
      "Stefania Castelletto",
      "Ivo Pietro Degiovanni",
      "Alan Migdall",
      "Valentina Schettini",
      "Michael Ware"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1117/12.561831",
    "title": "Measurement of Coupling PDC photon sources with single-mode and   multimode optical fibers",
    "url": "https://arxiv.org/abs/quant-ph/0408015"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "edca061e-3ac6-4984-b51b-8400a52acf19",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}