Performance Enhancement of Vibration Sensing Employing Multiple Phase-Shifted Fiber Bragg Grating

被引：33
作者：
Azmi, Asrul Izam [1 ,2 ]
Sen, Deep [1 ]
Sheng, Wenjuan [1 ]
Canning, John [3 ]
Peng, Gang-Ding [1 ]
机构：
[1] Univ New S Wales, Sch Elect Engn & Telecommun, Sydney, NSW 2052, Australia
[2] Univ Teknol Malaysia, Fac Elect Engn, Skudai 81310, Johor, Malaysia
[3] Univ Sydney, Interdisciplinary Photon Labs, Sch Chem, Sydney, NSW 2006, Australia
来源：
JOURNAL OF LIGHTWAVE TECHNOLOGY | 2011年 / 29卷 / 22期
关键词：
Fiber grating; multiple phase-shifted; multiple subchannels sensing; vibration sensor; FABRICATION; SENSORS;
D O I：
10.1109/JLT.2011.2169940
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：
Multiple phase-shifted fiber Bragg gratings (MPS-FBGs) are proposed for a novel intensity-type vibration sensing scheme with broadband source based interrogation. In this scheme, the collective and simultaneous operation of the subchannels of MPS-FBG multiplies the total acquired signal power change at a particular channel, considerably enhancing sensitivity. Compared to a standard FBG scheme, our experiment scheme attained significant sensitivity enhancement of nearly 20 dB using 17 phase-shifted FBG. These experimental results agree with the theoretical prediction based on cross-correlation relations. The sensitivity enhancement while retaining the system simplicity would be an attractive option for an economical coarse wavelength division multiplexed (CWDM) vibration sensing system based on a single broadband source.
引用
收藏
页码：3453 / 3460
页数：8
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