{
  "$type": "site.standard.document",
  "description": "The gyroscope has an optical system that has a fiber optic coupler (52) and single mode optical fibers (51,53) connected from a light source (10) to an optical integrated circuit (14). A polarization maintaining optical fiber (54) is connected to the input-output end of the optical integrated…",
  "path": "/patents/1087368",
  "publishedAt": "2004-05-06T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C19/721",
    "JAPAN AVIATION ELECTRONICS IND LTD [JP]"
  ],
  "textContent": "The gyroscope has an optical system that has a fiber optic coupler (52) and single mode optical fibers (51,53) connected from a light source (10) to an optical integrated circuit (14). A polarization maintaining optical fiber (54) is connected to the input-output end of the optical integrated circuit to produce a difference in group delay time between two orthogonal polarization modes. The polarization maintaining optical fiber has a predetermined length (L), and connected nearer the light source in the optical system to the optical integrated circuit. The polarization maintaining optical fiber produces a difference in group delay time that exceeds the coherence length of light from the light source.",
  "title": "Fiber optic gyroscope"
}