{
  "$type": "site.standard.document",
  "description": "An improved fiber-optic gyroscope (FOG) is proposed for enhancing the optical measurement sensitivity through the application of a heterodyne effect. The improved FOG is characterized by the use of a dual-injection polarization-maintaining 3×3 directional coupler which is configured to receive a…",
  "path": "/patents/1353924",
  "publishedAt": "2023-11-02T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C19/723",
    "Chi-Luen Wang"
  ],
  "textContent": "An improved fiber-optic gyroscope (FOG) is proposed for enhancing the optical measurement sensitivity through the application of a heterodyne effect. The improved FOG is characterized by the use of a dual-injection polarization-maintaining 3×3 directional coupler which is configured to receive a pair of source light beams that are injected thereinto in a bi-directional manner. The forward-injected light beam is used to be split into a pair of interrogating beams for use by a coiled optical fiber to implement the detection and measurement of the Sagnac effect due to a rotational movement. On the other hand, the backward-injected light beam is used to be mixed with the paired interrogating beams that have passed through and returned from the coiled optical fiber to thereby provide a heterodyne effect that can boost the differential optical power amplitude of the paired interrogating beams, thereby enhancing the optical measurement sensitivity of the FOG application.",
  "title": "FIBER-OPTIC GYROSCOPE WITH A DUAL-INJECTION POLARIZATION- MAINTAINING 3X3 DIRECTIONAL COUPLER FOR ENHANCED MEASUREMENT SENSITIVITY THROUGH HETERODYNE"
}