Fiber-optic sensor for strain-insensitive temperature measurements
US9677949B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 28, 2014 |
| Grant date | Jun 13, 2017 |
| Priority date | — |
| Expiry date | Dec 8, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2005/583
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An in-line fiber-optic temperature sensor is disclosed. In an implementation, the in-line fiber-optic temperature sensor includes an optically transmissive fiber, a reflector, a microstructured fiber defining a channel therein for receiving a fluid, and a Fabry-Perot cavity in fluid communication with the microstructured fiber. The microstructured fiber can be retained between the optically transmissive fiber and the reflector. The Fabry-Perot cavity defined by a material and configured to receive a gas having an index of refraction that changes in a known way with temperature and pressure changes in fluid communication with the channel of the microstructured fiber. The in-line fiber-optic temperature sensor also includes a chamber defined between the optically transmissive fiber and the microstructured fiber for connecting in fluid communication with a vacuum/pressure source for changing pressure. The in-line fiber-optic temperature sensor also includes a sensor for determining an optical interferometric reflection spectrum associated with the Fabry-Perot cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.