Detecting disturbance with cross polarized fiber optic sensing
US4918303A · kind A · utility
3Cited by
15References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 11, 1989 |
| Grant date | Apr 17, 1990 |
| Priority date | — |
| Expiry date | May 11, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01H9/004
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for determining physical parameters of a disturbance using a fiber optic coil and linearly polarized source light. The apparatus directs a linearly polarized source light through the fiber optic coil being effected by a disturbance, and then measures the effect by comparing optically the source light and the light affected by changes in fiber coil index to detect and develop digital data related to frequency and amplitude of the disturbance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.