High speed demodulation systems for fiber optic grating sensors
US6335524B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 1998 |
| Grant date | Jan 1, 2002 |
| Priority date | — |
| Expiry date | Oct 21, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/35383
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Fiber optic grating sensor demodulation systems are described that offer high speed and multiplexing options for both single and multiple parameter fiber optic grating sensors. To attain very high speeds for single parameter fiber grating sensors ratio techniques are used that allow a series of sensors to be placed in a single fiber while retaining high speed capability. These methods can be extended to multiparameter fiber grating sensors. Optimization of speeds can be obtained by minimizing the number of spectral peaks that must be processed and it is shown that two or three spectral peak measurements may in specific multiparameter applications offer comparable or better performance than processing four spectral peaks. Combining the ratio methods with minimization of peak measurements allows very high speed measurement of such important environmental effects as transverse strain and pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.