Cost effective method to measure strain independent of temperature using a half etched fiber Bragg grating

Mahesh Kondiparthi

doi:10.1117/12.904253

16 September 2011 Cost effective method to measure strain independent of temperature using a half etched fiber Bragg grating

Mahesh Kondiparthi

Author Affiliations +

Proceedings Volume 8154, Infrared Remote Sensing and Instrumentation XIX; 81541C (2011) https://doi.org/10.1117/12.904253
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

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 "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); https://doi.org/10.1117/12.904253

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