Pressure Sensing Characteristic of Fiber Bragg Grating Based on Diaphragm-Cantilever Beam
Pressure Sensing Characteristic of Fiber Bragg Grating Based on Diaphragm-Cantilever Beam
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DOI：
10.4028/www.scientific.net/amm.556-562.4400
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发表时间：
2014-05
期刊：
影响因子：
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通讯作者：
Yu Gao;Chao Liu;H. Mu
中科院分区：
文献类型：
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作者：
Yu Gao;Chao Liu;H. Mu
在本文中，提出了基于圆形板膜片和相等强度的悬臂的复合压力传感结构（FBG）。基于材料原理和模式耦合理论的机制，已经实现了固定在悬臂表面上的均匀压力和中心波长偏移之间的线性表达。通过模拟方法研究了基本模式共振波长的压力转移。结果表明，谐振波长是线性随环境压力增加的。结论极大地有助于应用纤维bragg光栅。
In this paper, a compounding pressure sensing structure of Fiber Bragg Grating (FBG) based on circular plate diaphragm and equal strength cantilever is proposed. Based on mechanics of materials principle and mode coupling theory, a linear expression between uniform pressure and central wavelength shift of fiber grating fixed on the surface of the cantilever has been achieved. The pressure shift of fundamental modes resonance wavelength is investigated by means of simulation method. The results show that the resonance wavelengths are linearity increased with ambient pressure. The conclusion is of great aid to the application of the fiber Bragg grating.