Fabry-Perot cavities based on chemical etching for high temperature and strain measurement

被引：39
|
作者：
Tafulo, Paula A. R. [1 ,2 ]
Jorge, P. A. S. [2 ]
Santos, J. L. [1 ,2 ]
Frazao, O. [2 ]
机构：
[1] Univ Porto, Dept Phys, P-4150179 Oporto, Portugal
[2] INESC Porto, UOSE, P-4150179 Oporto, Portugal
来源：
OPTICS COMMUNICATIONS | 2012年 / 285卷 / 06期
关键词：
Fiber optic sensors; Strain; Temperature; Fabry-Perot interferometer; Multimode optical fiber; FIBER; SENSOR; INTERFEROMETER;
D O I：
10.1016/j.optcom.2011.11.097
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this paper, two hybrid multimode/single mode fiber Fabry-Perot (FP) cavities were compared. The cavities fabricated by chemical etching are presented as high temperature and strain sensors. In order to produce this FP cavity a single mode fiber was spliced to a graded index multimode fiber with 62.5 mu m core diameter. The Fabry-Perot cavities were tested as a high temperature sensor in the range between room temperature and 700 C and as strain sensors. A reversible shift of the interferometric peaks with temperature allowed to estimate a sensitivity of 0.75 +/- 0.03 pm/degrees C and 0.98 +/- 0.04 pm/degrees C for the sensor A and B respectively. For strain measurement sensor A demonstrated a sensitivity of 1.85 +/- 0.07 pm/mu and sensor B showed a sensitivity of 3.14 +/- 0.05 pm/mu. The sensors demonstrated the feasibility of low cost fiber optic sensors for high temperature and strain. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：1159 / 1162
页数：4
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