{
  "annotation_id": "04dc0ec8-ea7b-4200-ace0-bff6cfe8f6e8",
  "date_created": "2026-03-02T18:02:38.183000Z",
  "date_modified": "2026-03-02T18:02:38.183000Z",
  "file_hash": "9771dcf85f7cb33e1fb7458c7aa80a042351b95adedf81850f831114e5121d83",
  "private": false,
  "record": {
    "abstract": "We present a bright, narrowband, portable, quasi-phase-matched two-crystal\nsource generating polarization-entangled photon pairs at 809 nm and 1555 nm at\na maximum rate of 1.2 10^6 s-1 THz-1 mW-1 after coupling to single-mode fiber.\nThe quantum channel at 1555 nm and the synchronization signal gating the single\nphoton detector are multiplexed in the same optical fiber of length 27 km by\nmeans of wavelength division multiplexers (WDM) having 100 GHz (0.8 nm) spacing\nbetween channels. This implementation makes quantum communication applications\ncompatible with current high-speed optical networks.",
    "arxiv_id": "quant-ph/0703253",
    "authors": [
      "S. Sauge",
      "M. Swillo",
      "S. Albert-Seifried",
      "G. B. Xavier",
      "J. Waldeback",
      "M. Tengner",
      "D. Ljunggren",
      "A. Karlsson"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1364/OE.15.006926",
    "journal_ref": "Opt. Express 15, 6926-6933 (2007)",
    "title": "Narrowband polarization-entangled photon pairs distributed over a WDM   link for qubit networks",
    "url": "https://arxiv.org/abs/quant-ph/0703253"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "a68d480b-c780-4f3b-8925-4eb9ae59a41e",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}