A High Precision Fiber Optic Fabry-Perot Pressure Sensor Based on AB Epoxy Adhesive Film

被引：12
作者：
Zhang, Yanan [1 ,2 ]
Zhang, Shubin [1 ,2 ]
Gao, Haitao [1 ,2 ]
Xu, Danping [1 ,2 ]
Gao, Zhuozhen [1 ,2 ]
Hou, Zheyu [1 ,2 ]
Shen, Jian [1 ,2 ]
Li, Chaoyang [1 ,2 ]
机构：
[1] Hainan Univ, Sch Informat & Commun Engn, Haikou 570228, Hainan, Peoples R China
[2] Hainan Univ, State Key Lab Marine Resource Utilizat South Chin, Haikou 570228, Hainan, Peoples R China
来源：
PHOTONICS | 2021年 / 8卷 / 12期
关键词：
optical fiber sensor; AB epoxy adhesive; thin films; pressure sensor; PHOTONIC CRYSTAL FIBER; SENSITIVITY; INTERFEROMETER;
D O I：
10.3390/photonics8120581
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
This paper proposes a Fabry-Perot pressure sensor based on AB epoxy adhesive with ultra-high sensitivity under low pressure. Fabry-Perot interference, located between single-mode fiber (SMF) and hollow-core fiber (HCF), is an ultra-thin AB epoxy film formed by capillary action. Then the thick HCF was used to fix the HCF and SMF at both ends with AB epoxy adhesive. Experimental results show that when the thickness of AB epoxy film is 8.74 mu m, and the cavity length is 30 mu m, the sensor has the highest sensitivity. The sensitivity is 257.79 nm/MPa within the pressure range of 0-70 kPa. It also investigated the influence of the curing time of AB epoxy on the interference spectrum. Experiments showed that the interference spectrum peak is blue-shifted with the increase of curing time. Our study also demonstrated the humidity stability of this pressure sensor. These characteristics mean that our sensor has potential applications in the biomedical field and ocean exploration.
引用
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页数：12
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