{
  "annotation_id": "f07f8509-e130-4706-b18e-63a2e2ac9414",
  "date_created": "2026-03-02T18:02:20.584000Z",
  "date_modified": "2026-03-02T18:02:20.584000Z",
  "file_hash": "ca5c25ba600c7c644bd61506ff94a0d344bea84b1a8072f37f985cb15f14f9fa",
  "private": false,
  "record": {
    "abstract": "We demonstrate a new simple technique to measure IR frequencies near 30 THz\nusing a femtosecond (fs) laser optical comb and sum-frequency generation. The\noptical frequency is directly compared to the distance between two modes of the\nfs laser, and the resulting beat note is used to control this distance which\ndepends only on the repetition rate fr of the fs laser. The absolute frequency\nof a CO2 laser stabilized onto an SF6 two-photon line has been measured for the\nfirst time. This line is an attractive alternative to the usual saturated\nabsorption OsO4 resonances used for the stabilization of CO2 lasers. First\nresults demonstrate a fractional Allan deviation of 3.10-14 at 1 s.",
    "arxiv_id": "quant-ph/0509053",
    "authors": [
      "Anne Amy-Klein",
      "Andrei Goncharov",
      "Mickael Guinet",
      "Christophe Daussy",
      "Olivier Lopez",
      "Alexander Shelkovnikov",
      "Christian Chardonnet"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1364/OL.30.003320",
    "title": "Absolute frequency measurement of an SF6 two-photon line using a   femtosecond optical comb and sum-frequency generation",
    "url": "https://arxiv.org/abs/quant-ph/0509053"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "439982c5-2744-4f89-8dc1-f047a16d2ced",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}