Patent ID: 7489835
Filing Date: 2009-02-10
Classification: F23N,G01N,G02B

Abstract:
1. A fiber gas sensor, comprising: a fiber core having a longitudinal axis; a first refractive index periodic modulated grating structure having a first amplitude modulation profile positioned about the fiber core for sensing a localized gas concentration; a second refractive index periodic modulated grating structure having a second amplitude modulation profile positioned about the fiber core at a distance along the longitudinal axis with respect to the first refractive index periodic modulated grating structure for sensing a localized temperature; a fiber cladding positioned about the first and second refractive index periodic modulated grating structures; and a sensing layer positioned about the fiber cladding of the first refractive index periodic modulated grating structure, the sensing layer including a sensing material made of a Pd-based alloy, wherein the gas sensor is capable of providing a temperature-corrected determination of the localized gas concentration.