{
  "annotation_id": "4726d32d-fd9e-4eba-9f15-344c5739a37a",
  "date_created": "2026-03-02T18:01:21.687000Z",
  "date_modified": "2026-03-02T18:01:21.687000Z",
  "file_hash": "ac84f43722f2465be89ad590aa9e6cf7008430f644e1fbf8a870c4f9acda0682",
  "private": false,
  "record": {
    "abstract": "We propose a method for in-situ measurement of the length of kilometer size\nFabry-Perot cavities in laser gravitational wave detectors. The method is based\non the vernier, which occurs naturally when the laser incident on the cavity\nhas a sideband. By changing the length of the cavity over several wavelengths\nwe obtain a set of carrier resonances alternating with sideband resonances.\n  From the measurement of the separation between the carrier and a sideband\nresonance we determine the length of the cavity. We apply the technique to the\nmeasurement of the length of a Fabry-Perot cavity in the Caltech 40m\nInterferometer and discuss the accuracy of the technique.",
    "arxiv_id": "physics/9809027",
    "authors": [
      "M. Rakhmanov",
      "M. Evans",
      "H. Yamamoto"
    ],
    "categories": [
      "physics.ins-det"
    ],
    "doi": "10.1088/0957-0233/10/3/013",
    "journal_ref": "Meas. Sci. Technol. 10 (1999) 190-194",
    "title": "Optical vernier technique for in-situ measurement of the length of long   Fabry-Perot cavities",
    "url": "https://arxiv.org/abs/physics/9809027"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "0dfe6f67-a7f6-4050-860f-cc4925bf7175",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}