Patent ID: 9677949
Date: 2017-06-13
CPC Classifications: G01J,G01K

Claim:
1. An in-line fiber-optic temperature sensor comprising: an optically transmissive fiber; a reflector having optical reflective characteristics; a microstructured fiber defining at least one fluid channel therein for receiving fluid, the microstructured fiber retained between the optically transmissive fiber and the reflector; a Fabry-Perot cavity defined by a material and configured to receive a gas having an index of refraction that changes with temperature and pressure changes in fluid communication with the at least one fluid channel of the microstructured fiber; 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; and a sensor for determining an optical interferometric reflection spectrum associated with the Fabry-Perot cavity, wherein the pressure in the Fabry-Perot cavity can be selectively adjusted via the vacuum/pressure source to facilitate a plurality of measurements of the reflection spectrum at a plurality of pressures to facilitate determination of a temperature associated with the Fabry-Perot cavity.