Method and apparatus for distributed sensing of volatiles using a long period fiber grating sensor with modulated plastic coating for environmental monitoring
US7651862B2 · kind B2 · utility
2Cited by
6References
11Claims
0Family size
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Key dates
| Filing date | Feb 26, 2002 |
| Grant date | Jan 26, 2010 |
| Priority date | — |
| Expiry date | Dec 25, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/03622
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Optical time domain reflectometry caused by absorption of a volatile or analyte into the fiber optic cladding is used an optical nose. The fiber optics (14) are covered with a gas permeable film (44) which is patterned to leave millimeter wide gas permeable notches (48a-48d). The notches contain a sensing polymer that responds to different gases by expanding or contracting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.