{
  "annotation_id": "6bab1749-da1f-45e5-a909-71278c8330f4",
  "date_created": "2026-03-02T18:01:00.581000Z",
  "date_modified": "2026-03-02T18:01:00.581000Z",
  "file_hash": "cd819a0df80a75882364c6bcb86f9c314efcf07dc833c5ba7a36cfa56aeb1888",
  "private": false,
  "record": {
    "abstract": "A new method for characterization of periodically poled crystals is developed\nbased on spontaneous parametric down-conversion. The method is demonstrated on\ncrystals of Y:LiNbO3, Mg:Y:LiNbO3 with non-uniform periodically poled\nstructures, obtained directly under Czochralski growth procedure and designed\nfor application of OPO in the mid infrared range. Infrared dispersion of\nrefractive index, effective working periods and wavelengths of OPO were\ndetermined by special treatment of frequency-angular spectra of spontaneous\nparametric down-conversion in the visible range. Two-dimensional mapping via\nspontaneous parametric down-conversion is proposed for characterizing spatial\ndistribution of bulk quasi-phase matching efficiency across the input window of\na periodically poled sample.",
    "arxiv_id": "physics/0505215",
    "authors": [
      "G. Kh. Kitaeva",
      "V. V. Tishkova",
      "I. I. Naumova",
      "A. N. Penin",
      "C. H. Kang",
      "S. H. Tang"
    ],
    "categories": [
      "physics.optics",
      "physics.ins-det"
    ],
    "doi": "10.1007/s00340-005-1923-1",
    "journal_ref": "Applied Physics B: Lasers and Optics. Volume 81, Number 5, pages:\n  645 - 650. Date: September 2005",
    "title": "Mapping of periodically poled crystals via spontaneous parametric   down-conversion",
    "url": "https://arxiv.org/abs/physics/0505215"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "0e1bdf42-0f5f-457f-b24d-20e2a1d79141",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}