{
  "annotation_id": "64ebec63-ae1f-4d3a-84ab-f16919f02f00",
  "date_created": "2026-03-02T18:01:56.466000Z",
  "date_modified": "2026-03-02T18:01:56.466000Z",
  "file_hash": "abd6fdb3763c3452af99b0468a1ad9958093e23a742992152719ad158d5d2734",
  "private": false,
  "record": {
    "abstract": "We report the realization of a light source specifically designed for the\ngeneration of bright continuous-variable entangled beams and for\nHeisenberg-limited inteferometry. The source is a nondegenerate, single-mode,\ncontinuous-wave optical parametric oscillator in Na:KTP, operated at frequency\ndegeneracy and just above threshold, which is also of interest for the study of\ncritical fluctuations at the transition point. The residual\nfrequency-difference jitter is $\\pm$ 150 kHz for a 3 MHz cold cavity half-width\nat half maximum. We observe 4 dB of photon-number-difference squeezing at 200\nkHz. The Na:KTP crystal is noncritically phase-matched for a 532 nm pump and\npolarization crosstalk is therefore practically nonexistent.",
    "arxiv_id": "quant-ph/0212113",
    "authors": [
      "Sheng Feng",
      "Olivier Pfister"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/1464-4266/5/3/310",
    "journal_ref": "J. Opt. B, Quantum Semiclass. Opt., 5, 262 (2003)",
    "title": "Stable nondegenerate optical parametric oscillation at degenerate   frequencies in Na:KTP",
    "url": "https://arxiv.org/abs/quant-ph/0212113"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "e95b4e5d-5311-4dfd-8386-fe267c021308",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}