16 September 2011 Cost effective method to measure strain independent of temperature using a half etched fiber Bragg grating
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Abstract
A novel approach for the measurement of strain independent of temperature is proposed. This approach is based on the fact that an applied strain on a half etched fiber Bragg grating (FBG) leads to a change in spectral area of FBG reflection. An FBG written in a fiber optic cable, which has two different clad diameters over its length, is considered for analysis. When such FBG is illuminated with a broadband source, strain applied on the same can be estimated by measuring the changes in optical power of the reflected radiation using a photodiode. Temperature changes leads to a shift in the entire reflection, keeping the spectral area unaltered, hence allowing one to measure strain independent of temperature.
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Mahesh Kondiparthi, Mahesh Kondiparthi, } "Cost effective method to measure strain independent of temperature using a half etched fiber Bragg grating", Proc. SPIE 8154, Infrared Remote Sensing and Instrumentation XIX, 81541C (16 September 2011); doi: 10.1117/12.904253; https://doi.org/10.1117/12.904253
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