{
  "annotation_id": "dae16e7c-0f63-4f38-9585-b68bff3b7f04",
  "date_created": "2026-03-02T18:01:03.811000Z",
  "date_modified": "2026-03-02T18:01:03.811000Z",
  "file_hash": "8c692a8de8eb408c85027bdbf055a97effba5ebe6c74444df5972981921fa6fe",
  "private": false,
  "record": {
    "abstract": "We consider an index-guiding silica photonic crystal fiber with a triangular\nair-hole structure and a poled quadratic nonlinearity. By tuning the pitch and\nthe relative hole size, second-harmonic generation with zero group-velocity\nmismatch is found for any fundamental wavelength above 780 nm. The\nphase-velocity mismatch has a lower limit with coherence lengths in the micron\nrange. The dimensionless nonlinear parameter is inversely proportional to the\npitch and proportional to the relative hole size. Selected cases show\nbandwidths suitable for 20 fs pulse-conversion with conversion efficiencies as\nhigh as 25%/mW.",
    "arxiv_id": "physics/0511244",
    "authors": [
      "Morten Bache",
      "Hanne Nielsen",
      "Jesper L\u00e6gsgaard",
      "Ole Bang"
    ],
    "categories": [
      "physics.optics"
    ],
    "doi": "10.1364/OL.31.001612",
    "journal_ref": "Opt. Lett. 31, 1612-1614 (2006)",
    "title": "Tuning quadratic nonlinear photonic crystal fibers for zero   group-velocity mismatch",
    "url": "https://arxiv.org/abs/physics/0511244"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "6ac6da4c-150b-4378-8817-2895528ab978",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}