Patent ID: 7423762
Filing Date: 2008-09-09
Classification: G01D,G01L

Abstract:
1. A device for sensing the pressure of an environment, comprising: a capillary having a proximal end and a distal end, and a bore extending therebetween; an optical fiber having a proximal end and a distal end, the distal end configured to partially reflect light, the distal end being disposed within and extending through the bore of the capillary to the distal end of the capillary; a tube having a proximal end and a distal end and a length; a plug having a proximal end and a distal end, the proximal end configured to reflect light; a tube having a proximal end configured for receiving the optical fiber and capillary such that the optical fiber and capillary extend into the tube for a selected distance, the tube extending for a length to a distal end, the distal end of the tube configured for receiving the plug such that a gap is formed within the tube between the distal end of the optical fiber and the proximal end of the plug; and at least one periodic refractive index perturbation disposed in the optical fiber at a location proximal to the distal end of the optical fiber for providing a measurement of a temperature effect upon the gap within the tube.