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.

引用

页数：4

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