Fiber loop ring-down optical fiber grating gas pressure sensor
Fiber loop ring-down optical fiber grating gas pressure sensor
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DOI：
10.1016/j.optlaseng.2010.06.005
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发表时间：
2010-12-01
影响因子：
4.6
通讯作者：
Jiang, Shiquan
中科院分区：
文献类型：
--
作者：
Tang, Daqing;Yang, Dexing;Jiang, Shiquan
提出了一种基于光纤环衰荡的裸光纤布拉格光栅（FBG）气压传感器。通过讨论衰荡时间与气体压力的关系，从理论上分析了该传感器的压力灵敏度。通过检测不同气压下的衰荡时间，在时域内研究了裸光纤光栅的气压特性。实验结果表明，施加在裸光纤光栅上的压力与衰荡时间呈线性关系。灵敏度可达-0.384 μ s/MPa（相当于-240 μ m/MPa），是所研制的光谱分析仪的79倍。这种压力传感器可用于气体或液体的压力测量。(C)2010爱思唯尔有限公司版权所有。
A kind of bare fiber Bragg grating (FBG) gas pressure sensor based on fiber loop ring-down is presented, in which there are no sensitizing means or assistant structure on the bare FBG. The pressure sensitivity is analyzed theoretically via discussing the relationship between the ring-down time and the gas pressure. By detecting the ring-down time at different gas pressure levels, the gas pressure characteristics of the bare FBG are investigated in the time domain. The experimental results demonstrate that there exists a linear dependence of the pressure applied to the bare FBG on the ringdown time. A high sensitivity of -0.384 mu s/MPa (being equivalent to -240 pm/MPa) could be achieved, which is 79 times larger than that of the optical spectral analyzer interrogated. This kind of pressure sensor could be used for gas or liquid pressure measurement. (C) 2010 Elsevier Ltd. All rights reserved.