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

页码：3453 / 3460

页数：8

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