Fabry-Perot cavity for curvature measurement in a medical needle

被引：1
|
作者：
Novais, Susana [1 ]
Silva, Susana O. [1 ]
Frazao, Orlando [1 ,2 ]
机构：
[1] INESC TEC Inst Syst & Comp Engn Technol & Sci, Rua Campo Alegre 687, P-4169007 Porto, Portugal
[2] Univ Porto, Fac Sci, Dept Phys & Astron, Rua Campo Alegre 687, P-4169007 Porto, Portugal
来源：
SEVENTH EUROPEAN WORKSHOP ON OPTICAL FIBRE SENSORS (EWOFS 2019) | 2019年 / 11199卷
关键词：
Curvature sensing; Fabry-Perot microcavities; graded-index; fiber optic sensors;
D O I：
10.1117/12.2540504
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A reflective fiber optic sensor based on a Fabry-Perot cavity made by splicing two sections of multimode fiber is demonstrated to measure the needle curvature. The sensing structure was incorporated into a medical needle and characterized for curvature and temperature measurements. The maximum sensitivity of -0.152dB/m(-1) was obtained to the curvature measurements, with a resolution of 0.089m(-1). When subjected to temperature, the sensing head presented a low temperature sensitivity, which resulted in a small cross-sensitivity.
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页数：4
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