LPFG和FBG级联结构双参数光纤传感器研究
发布时间：2019-01-28 06:58
【摘要】：提出了一种长周期光纤光栅(LPFG)级联布拉格光纤光栅(FBG)的温度/应变双参数光纤传感器。利用飞秒激光直写制作LPFG并级连FBG,且FBG波谷位置为1 551.9 nm,LPFG波谷位置为1 559.1 nm,最高对比度为-12.7 d B。在30~70℃温度变化范围内对传感器温度特性进行测试,并在25℃超净环境下对0~500με应变变化范围内对传感器应变特性进行测试。实验结果表明,升温过程FBG中心波长发生红移,灵敏度15.00 pm/℃,线性度0.981 3;LPFG中心波长发生蓝移,灵敏度-11.75 pm/℃,线性度0.945 3。降温过程FBG中心波长发生蓝移,灵敏度18.25 pm/℃,线性度0.953 8;LPFG中心波长发生红移,灵敏度-15.42 pm/℃,线性度0.980 2。加载过程FBG中心波长发生红移,灵敏度0.93 pm/με,线性度0.991 5;LPFG中心波长发生蓝移,灵敏度-1.51 pm/με,线性度0.986 3。卸载过程FBG中心波长发生蓝移,灵敏度0.92 pm/με,线性度0.990 9;LPFG中心波长发生红移,灵敏度-1.51 pm/με,线性度0.972 8。结果表明,该光纤传感器灵敏度高,线性度好,可以同时动态实现应变和温度的测量。
[Abstract]:A temperature / strain two-parameter fiber sensor based on long-period fiber Bragg grating (LPFG) cascaded fiber Bragg grating (FBG) is proposed. The femtosecond laser direct writing is used to fabricate LPFG contiguous FBG, with the FBG trough position of 1 551.9 nm,LPFG and the highest contrast of -12.7 dB at 1 559.1 nm,. The temperature characteristics of the sensor were measured in the range of 30 鈩，
本文编号：2416814
[Abstract]:A temperature / strain two-parameter fiber sensor based on long-period fiber Bragg grating (LPFG) cascaded fiber Bragg grating (FBG) is proposed. The femtosecond laser direct writing is used to fabricate LPFG contiguous FBG, with the FBG trough position of 1 551.9 nm,LPFG and the highest contrast of -12.7 dB at 1 559.1 nm,. The temperature characteristics of the sensor were measured in the range of 30 鈩，
本文编号：2416814
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