Phase-sensitive interrogation of fiber Bragg grating resonators for sensing applications

被引：70
作者：
Chow, JH [1 ]
Littler, ICM
de Vine, G
McClelland, DE
Gray, MB
机构：
[1] Australian Natl Univ, Fac Sci, Ctr Gravitat Phys, Canberra, ACT 0200, Australia
[2] Univ Sydney, CUDOS, Sch Phys, Sydney, NSW 2006, Australia
来源：
JOURNAL OF LIGHTWAVE TECHNOLOGY | 2005年 / 23卷 / 05期
基金：
澳大利亚研究理事会;
关键词：
Bragg grating interrogation; Bragg grating resonator; fiber Fabry-Perot (FFP); fiber resonator; fiber sensor; frequency locking; nanostrain; picostrain; strain sensor;
D O I：
10.1109/JLT.2005.846895
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：
This paper discusses a phase-sensitive technique for remote interrogation of passive Bragg grating Fabry-Wrot resonators. It is based on Pound-Drever-Hall (PDH) laser frequency locking, using radio-frequency phase modulation sidebands to derive an error signal from the complex optical response, near resonance, of a Fabry-Wrot interferometer. We examine how modulation frequency and resonance bandwidth affect this error signal. Experimental results are presented that demonstrate, when the laser is locked, this method detects differential phase shifts in the optical carrier relative to its sidebands, due to minute fiber optical path displacements.
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页码：1881 / 1889
页数：9
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