Intrinsic Fabry-Perot Cavity Sensor Based on Etched Multimode Graded Index Fiber for Strain and Temperature Measurement

被引：53
作者：
Tafulo, Paula A. R. [1 ]
Jorge, Pedro. A. S. [1 ]
Santos, Jose Luis [1 ,2 ]
Araujo, Francisco M. [1 ,3 ]
Frazao, Orlando [1 ]
机构：
[1] INESC Porto, UOSE, P-4150179 Oporto, Portugal
[2] Univ Porto, Dept Phys, P-4150179 Oporto, Portugal
[3] FiberSensing, P-4470640 Maia, Portugal
来源：
IEEE SENSORS JOURNAL | 2012年 / 12卷 / 01期
关键词：
Fabry-Perot interferometer; fiber-optic sensors; multimode optical fiber; strain; temperature; INTERFEROMETER;
D O I：
10.1109/JSEN.2011.2107737
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Two Fabry-Perot interferometers based on chemical etching in multimode graded index fibers are fabricated and their response to temperature and strain are compared. Chemical etching is applied in the graded index fiber end creating an air cavity. The interferometric cavity is formed when the graded index fiber with the air concavity is spliced to a single-mode fiber. The intrinsic sensors present high sensitivity to strain and low sensitivity to temperature. For the 62.5 mu m core fiber, sensitivities of 6.99 pm/mu epsilon and, 0.95 pm/degrees C were obtained for strain and temperature, respectively. The sensor based in the 50 mu m core fiber, on the other hand, presented sensitivities of 4.06 pm/mu epsilon and -0.84 pm/degrees C for strain and temperature, respectively.
引用
收藏
页码：8 / 12
页数：5
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