Method and system for measuring a parameter in a high...

Details Method and system for measuring a parameter in a high... Method and system for measuring a parameter in a high...

G - Physics

01

D

G01D 3/028 (2006.01) G01B 11/16 (2006.01) G01D 5/32 (2006.01) G01K 11/32 (2006.01) G01N 21/00 (2006.01)

Patent

CA 2740372

A dual parameter sensor for sensing temperature and mechanical or chemical or related information is disclosed. The sensor is formed of an optical waveguide suitable for use insitu in a high temperature environment having a Bragg grating written into a core region thereof with short-pulsed electromagnetic radiation. By noting the thermal Black Body radiation level above 650 °C, wavelength shifts due to temperature can be decoupled from wavelength shifts due to the other parameter being sensed. Advantageously the thermal radiation can be used as an optical source to probe the Bragg grating, considerably simplifying the interrogating apparatus, removing the need for an extrinsic optical source to probe the sensor.

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