| 基于光纤Bragg光栅反射波带宽展宽的压力传感研究 |
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| 引用本文： | 郭团,乔学光,贾振安,孙安,陈长勇.基于光纤Bragg光栅反射波带宽展宽的压力传感研究[J].光子学报,2004,33(3):288-290. |
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| 作者姓名： | 郭团 乔学光 贾振安 孙安 陈长勇 |
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| 作者单位： | 西安石油大学理学院,光纤传感重点实验室,西安,710065 |
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| 基金项目： | 国家自然科学基金项目 (698770 2 5)，国家“863”发展计划项目 (2 0 0 2AA3 13 150 )，国家教育部科学技术重点项目 (0 2 190 )，陕西省自然科学基金项目 (2 0 0 0C3 4 )资助 |
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| 摘 要： | 报道了一种新颖的光纤Bragg光栅压力传感装置,提出并实现了利用光纤Bragg光栅反射波带宽展宽实现压力传感的新方法.利用压力作用下双孔悬臂梁非均匀应变带动光栅使Bragg反射波漂移的同时带宽展宽,实现压力传感.在0~23.5 N的测量范围内,基于光谱分析仪0.05 nm的光谱分辨率,压力分辨率为0.54 N,带宽最大展宽量2.14 nm,压力响应曲线具有良好的线性.多次测量表明：展宽波型稳定,重复性好.
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| 关 键 词： | 光纤光栅 带宽展宽 压力传感 |
| 收稿时间： | 2003-10-16 |
| 修稿时间： | 2003年10月16 |
Investigation of Fiber Bragg Grating for Pressure Sensing Based on Reflected Wave's Broadened Bandwidth |
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| Institution: | (Key Lab of Optical Fiber Sensing,School of Science, Xi’an Shiyou University, Xi’an 710065,China) |
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| Abstract: | A new approach for pressure sensing using a fiber Bragg grating based on reflected wave’s broadened bandwidth is proposed and demonstrated. FBG is affixed on the non-uniformity strain area of double-hole cantilever beam by special polymer. Bragg central reflected wave is shifted and reflected wave’s bandwidth is broadened caused by pressure change. Pressure sensing is achieved through measuring the change of broaden-bandwidth. In the pressure range of 0~23.5 N, due to the spectral resolution of 0.05 nm for spectral analyzer, the resolutions of pressure measure is 0.54 N and the change of reflected bandwidth is up to 2.14 nm. Response curve of pressure has a good linearity. Reflection spectrum has a steady figure through repeated measurement. |
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| Keywords: | Fiber Bragg grating Broadened bandwidth Pressure s ensing |
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