Abstract
Recently, 3D printing is a very promising method for fiber Bragg grating (FBG) sensor packaging, the physical and chemical properties of the printing materials will directly affect the performance of the packaged FBGs. Thus, in this paper, we focus on the analysis of the influence of the characteristic of the packaging material, especially the temperature characteristic. Firstly, an FBG is packaged based on 3D printing online packaging technology, and the feasibility of this packaging scheme is experimentally verified. Subsequently, the influence of the packaging scheme and material on the sensing characteristics of the packaged FBG is investigated, especially the influence of the temperature characteristic of the packaging material. Finally, we experimentally investigate the stability of the 3D-printing packaged FBG. Experimental results demonstrate that the measurement error caused by central wavelength fluctuation is lower than 0.01425 mm and 0.3 °C for displacement and temperature measurement, respectively. Besides that, the 3D-printing packaging structure can not only effectively protect the FBG, and the packaged FBG with high stability can also be obtained.
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