{
  "annotation_id": "840ab85c-a499-4a9b-94d3-f223b0bf35aa",
  "date_created": "2026-03-02T18:02:12.978000Z",
  "date_modified": "2026-03-02T18:02:12.978000Z",
  "file_hash": "f79eeba851da3d38a70ecea0efe36c52e3568615ef33aef674643117311376d2",
  "private": false,
  "record": {
    "abstract": "We describe a very stable type II optical parametric oscillator operated\nabove threshold which provides 9.7 $\\pm$ 0.5 dB (89%) of quantum noise\nreduction on the intensity difference of the signal and idler modes. We also\nreport the first experimental study by homodyne detection of the generated\nbright two-mode state in the case of frequency degenerate operation obtained by\nintroducing a birefringent plate inside the optical cavity.",
    "arxiv_id": "quant-ph/0412108",
    "authors": [
      "Julien Laurat",
      "Thomas Coudreau",
      "Laurent Longchambon",
      "Claude Fabre"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1364/OL.30.001177",
    "journal_ref": "Optics Letters 30 (2005) 1177",
    "title": "Experimental investigation of amplitude and phase quantum correlations   in a type II OPO above threshold: from the non-degenerate to the degenerate   operation",
    "url": "https://arxiv.org/abs/quant-ph/0412108"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "4af0e2a1-b6d0-4c58-99ef-9a84670b2a75",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}