Simultaneous Measurement of Strain and Temperature With a Single Fiber Bragg Grating Written in a Tapered Optical Fiber
2010; IEEE Sensors Council; Volume: 10; Issue: 2 Linguagem: Inglês
10.1109/jsen.2009.2030261
ISSN1558-1748
AutoresHugo Lima, Paulo Antunes, João L. Pinto, Rogério N. Nogueira,
Tópico(s)Advanced Fiber Laser Technologies
ResumoA sensing head configuration and the necessary interrogation parameters to simultaneously measure strain and temperature using a single fiber Bragg grating (FBG) are presented and demonstrated. By writing the FBG in a linearly etched fiber, we were able to use the information encoded in the peak wavelength and in the spectral width of the FBG. The spectral width of the grating depends uniquely on the applied strain and is temperature independent. An uncertainty of ±15.26 ¿¿ and ±1.92°C was achieved in the experimental verification.
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