Temperature-insensitive chemical sensor based on a fiber Bragg grating
Temperature-insensitive chemical sensor based on a fiber Bragg grating
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DOI：
10.1016/j.snb.2006.03.046
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发表时间：
2007-01
影响因子：
8.4
通讯作者：
X. Sang;Chongxiu Yu;T. Mayteevarunyoo;Kuiru Wang;Qi Zhang;P. Chu
中科院分区：
文献类型：
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作者：
X. Sang;Chongxiu Yu;T. Mayteevarunyoo;Kuiru Wang;Qi Zhang;P. Chu
通过对半个光栅区域的包层刻蚀引起的峰值波长差的鉴别，实现了温度不敏感的光纤光栅传感器。对两种光纤光栅的热特性和化学灵敏度进行了实验研究。实验结果表明，蚀刻的一半和其余的光栅区域具有几乎相同的热响应，和周围的化学溶液的浓度变化可以通过测量峰值波长差来检测。这两种传感器已被用来测量丙二醇溶液和糖溶液的浓度，其中一个可以检测0.067%和0.027%的浓度变化的两种溶液与一个低成本的波长询问模块。
Temperature-insensitive fiber Bragg grating sensors have been demonstrated by discriminating the peak wavelength difference caused by etching the cladding of half of the grating region. Thermal characteristics and chemical sensitivity of two fiber Bragg gratings are experimentally investigated. Experimental results indicate that the etched half and the rest of the grating region have almost the same thermal response, and concentration changes of the surrounding chemical solutions can be detected by measuring the peak wavelength difference. The two sensors have been used to measure the concentrations of propylene glycol solutions and sugar solutions, and one of them could detect 0.067% and 0.027% concentration change for two kinds of solutions with a low-cost wavelength interrogation module.