Sensitivity-enhanced temperature sensor based on PDMS-coated long period fiber grating

被引：110
作者：
Wang, Qi [1 ,2 ]
Du, Chao [1 ]
Zhang, Jiaming [1 ]
Lv, Riqing [1 ]
Zhao, Yong [1 ,2 ]
机构：
[1] Northeastern Univ, Coll Informat Sci & Engn, Shenyang 110819, Peoples R China
[2] Northeastern Univ, State Key Lab Synthet Automat Proc Ind, Shenyang 110819, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2016年 / 377卷
基金：
中国国家自然科学基金; 美国国家科学基金会; 高等学校博士学科点专项科研基金;
关键词：
Long period fiber grating; Optical fiber sensors; Temperature measurement; Sensitivity-enhanced; REFRACTIVE-INDEX; INTERFEROMETER;
D O I：
10.1016/j.optcom.2016.05.039
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A sensitivity-enhanced temperature sensor based on a poly-dimethylsiloxane (PDMS)-coated long period fiber grating (LPFG) has been proposed and experimentally investigated. By embedding the LPFG in a temperature-sensitive elastomeric polymer, the temperature sensitivity of the proposed sensor could be effectively improved by 4 times higher than those of the conventional bare LPFG sensors due to the high thermo-optic coefficient (TOC) of PDMS. It can be found that the temperature sensitivities of higher order modes are higher than those of lower-order modes by analyzing transmission spectra characteristics of the sensor. Because of LPFG is sensitive to surrounding refractive index (RI), the PDMS-coated LPFG will have a high temperature sensitivities of 255.4 pm/C in the range of 20-80 degrees C. Due to the high measurement resolution of 0.078 degrees C, the sensor is promising to be applied to the fields that high-precision temperature measurement is required. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：89 / 93
页数：5
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