Influence of metal bonding layer on strain transfer performance of FBG

Hao Liu; Weimin Chen; Peng Zhang; Li Liu; Yuejie Shu; Jun Wu

doi:10.1117/12.2014788

31 January 2013 Influence of metal bonding layer on strain transfer performance of FBG

Hao Liu, Weimin Chen, Peng Zhang, Li Liu, Yuejie Shu, Jun Wu

Proceedings Volume 8759, Eighth International Symposium on Precision Engineering Measurement and Instrumentation; 87592R (2013) https://doi.org/10.1117/12.2014788
Event: International Symposium on Precision Engineering Measurement and Instrumentation 2012, 2012, Chengdu, China

Abstract

Metal bonding layer seriously affects the strain transfer performance of Fiber Bragg Grating (FBG). Based on the mode of FBG strain transfer, the influence of the length, the thickness, Poisson’s ratio, elasticity modulus of metal bonding layer on the strain transfer coefficient of FBG is analyzed by numerical simulation. FBG is packaged to steel wire using metal bonding technology of FBG. The tensile tests of different bonding lengths and elasticity modulus are carried out. The result shows the strain transfer coefficient of FBGs are 0.9848,0.962 and their average strain sensitivities are 1.076 pm/με,1.099 pm/με when the metal bonding layer is zinc, whose lengths are 15mm, 20mm, respectively. The strain transfer coefficient of FBG packaged by metal bonding layer raises 8.9 percent compared to epoxy glue package. The preliminary experimental results show that the strain transfer coefficient increases with the length of metal bonding layer, decreases with the thickness of metal bonding layer and the influence of Poisson’s ratio can be ignored. The experiment result is general agreement with the analysis and provides guidance for metal package of FBG.

Citation Download Citation

Hao Liu, Weimin Chen, Peng Zhang, Li Liu, Yuejie Shu, and Jun Wu "Influence of metal bonding layer on strain transfer performance of FBG", Proc. SPIE 8759, Eighth International Symposium on Precision Engineering Measurement and Instrumentation, 87592R (31 January 2013); https://doi.org/10.1117/12.2014788

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