Fiber strain sensor based on a π-phase-shifted Bragg grating and the Pound-Drever-Hall technique

被引：143

作者：

Gatti, D. ^{[1
,2
]}

Galzerano, G. ^{[1
,2
]}

Janner, D. ^{[3
]}

Longhi, S. ^{[1
,2
]}

Laporta, P. ^{[1
,2
]}

机构：

[1] Politecn Milan, CNR, Ist Foton & Nanotecnol, I-20133 Milan, Italy

[2] Politecn Milan, Dipartimento Fis, I-20133 Milan, Italy

[3] ICFO, Barcelona 08860, Spain

来源：

OPTICS EXPRESS | 2008年 / 16卷 / 03期

关键词：

Bragg gratings - Fourier optics - Hall effect - Phase locked loops - Phase shifters;

D O I：

10.1364/OE.16.001945

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A fiber strain sensor based on a pi-phase-shifted Bragg grating and an extended cavity diode laser is proposed. Locking the laser frequency to grating resonance by the Pound-Drever-Hall technique results in a strain power spectral density S-epsilon(f) = (3 x 10(-19) f(-1) + 2.6 x 10(-23)) epsilon(2)/Hz in the Fourier frequency range from 1 kHz to 10 MHz (epsilon being the applied strain), corresponding to a minimum sensitivity of 5 p epsilon Hz(-1/2) for frequencies larger than 100 kHz. (C) 2008 Optical Society of America.

引用

页码：1945 / 1950

页数：6

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