Multiplexed identical broad-band-chirped grating interrogation system for large-strain sensing applications

被引:22
作者
Fallon, RW
Zhang, L
Gloag, A
Bennion, I
机构
[1] Dept. Electron. Eng. and Appl. Phys., Aston University, Birmingham, B4 7ET, Aston Triangle
基金
英国工程与自然科学研究理事会;
关键词
fiber Bragg gratings; multiplexing interrogation; optical sensors; SMART structures; strain sensing; temperature;
D O I
10.1109/68.643287
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
We report here a simple and low-cost technique for extreme strain measurement, The overlapping of a chirped sensor grating with an identical reference de,ice provides a novel mechanism for measuring strain, This system permits a linear relationship between strain and resultant optical power, The maximum sensing range of the system is determined by the bandwidths of the gratings employed, A 20-nm chirped grating facilitates a sensing range up to 20000 mu epsilon. This paper also demonstrates an arrangement for multiplexing up to four gratings, which can be rapidly and truly simultaneously interrogated.
引用
收藏
页码:1616 / 1618
页数:3
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