Off-axis ultraviolet-written fiber Bragg gratings for directional bending measurements

被引：71
作者：
Feng, Dingyi [1 ,2 ]
Qiao, Xueguang [1 ]
Albert, Jacques [2 ]
机构：
[1] Northwest Univ, Dept Phys, Xian 710069, Peoples R China
[2] Carleton Univ, Dept Elect, 1125 Colonel By Dr, Ottawa, ON K1S 5B6, Canada
来源：
OPTICS LETTERS | 2016年 / 41卷 / 06期
基金：
加拿大自然科学与工程研究理事会; 中国国家自然科学基金;
关键词：
ABRUPT BICONICAL TAPER; OPTICAL-FIBER; LONG-PERIOD; SENSOR; BIREFRINGENCE; TEMPERATURE;
D O I：
10.1364/OL.41.001201
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Off-axis fiber Bragg gratings are inscribed by ultraviolet irradiation limited to expose only a portion of the fiber core cross section. The coupling to cladding modes is significantly increased, and the amplitude of the cladding mode resonances becomes sensitive to bending in magnitude and direction. Sensitivities ranging from +1.17 dB/m(-1) to -1.25 dB/m(-1) were obtained for bending in different directions relative to the offset direction of the grating, for curvatures from 0 to 1.1 m(-1), a range ideal for the shape sensing of large structures. The bending sensor response is also shown to be independent of temperature and the surrounding refractive index. (C) 2016 Optical Society of America
引用
收藏
页码：1201 / 1204
页数：4
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