Combined raman and IR fiber-based sensor for gas detection
US8759767B2 · kind B2 · utility
3Cited by
18References
20Claims
0Family size
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Key dates
| Filing date | Aug 21, 2009 |
| Grant date | Jun 24, 2014 |
| Priority date | — |
| Expiry date | Apr 18, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/8528
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A double-pass fiber-optic based spectroscopic gas sensor delivers Raman excitation light and infrared light to a hollow structure, such as a hollow fiber waveguide, that contains a gas sample of interest. A retro-reflector is placed at the end of this hollow structure to send the light back through the waveguide where the light is detected at the same end as the light source. This double pass retro reflector design increases the interaction path length of the light and the gas sample, and also reduces the form factor of the hollow structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.