Compact fiber-optic curvature sensor based on super-mode interference in a seven-core fiber

被引：135

作者：

Salceda-Delgado, G. ^{[1
,2
]}

Van Newkirk, A. ^{[1
]}

Antonio-Lopez, J. E. ^{[1
]}

Martinez-Rios, A. ^{[2
]}

Schuelzgen, A. ^{[1
]}

Amezcua Correa, R. ^{[1
]}

机构：

[1] Univ Cent Florida, Coll Opt & Photon, CREOL, Orlando, FL 32816 USA

[2] Ctr Invest Opt AC, Leon 37150, Mexico

来源：

OPTICS LETTERS | 2015年 / 40卷 / 07期

关键词：

MULTICORE FIBER; TEMPERATURE; INTERFEROMETER;

D O I：

10.1364/OL.40.001468

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A compact, low loss, and highly sensitive optical fiber curvature sensor is presented. The device consists of a fewmillimeter- long piece of seven-core fiber spliced between two single-mode fibers. When the optical fiber device is kept straight, a pronounced interference pattern appears in the transmission spectrum. However, when the device is bent, a spectral shift of the interference pattern is produced, and the visibility of the interference notches changes. This allows for using either visibility or spectral shift for sensor interrogation. The dynamic range of the device can be tailored through the proper selection of the length of the seven-core fiber. The effects of temperature and refractive index of the external medium on the response of the curvature sensor are also discussed. Linear sensitivity of about 3000 nm/mm(-1) for bending was observed experimentally. (C) 2015 Optical Society of America

引用

页码：1468 / 1471

页数：4

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