Multi-spectral features sensing techniques and sensors comprising plural gratings with plural chirp slopes
US11137271B2 · kind B2 · utility
1Cited by
2References
10Claims
0Family size
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Key dates
| Filing date | Feb 24, 2020 |
| Grant date | Oct 5, 2021 |
| Priority date | — |
| Expiry date | Mar 23, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M11/3172
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Various embodiments of sensors are described that exhibit several spectral features that together offer coverage of a wavelength range corresponding to the desired strain dynamic range (or temperature range) of a system. The spectral features arise from a Fabry-Perot interferometer formed by two overlapping chirped FBGs, the free-spectral range (FSR) of which varies with wavelength. The spectral features may be differentiated due to a combination of spacing and slope of the overlapped, chirped gratings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.