Multifunctional Structure for Temperature Measurement in Different Environmental Conditions

This article presented the development of a multifunctional structure for temperature monitoring in different environments. This multifunctional structure was manufactured using a commercial resin used in 3D printing and an optical fiber inscribed with a Bragg grating (FBG). Then, the structure was subjected to different tests to investigate the influence of the effects of humidity and temperature on the Bragg grating wavelength <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">(λB)</tex> . In the first test, it was submerged in a reservoir with water, while in the second the structure was positioned inside a climate chamber. It was observed in the results that the moisture absorbed by the resin has less influence on the variation of λ <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">B</tex> than temperature. Furthermore, the multifunctional structure showed a temperature sensitivity of 33.02 pm/°C in the temperature range of 25°C to 40°C.