High Spatial and Spectral Resolution Long-Range Sensing Using Brillouin Echoes

被引：146

作者：

Foaleng, Stella M. ^{[1
]}

Tur, Moshe ^{[1
]}

Beugnot, Jean-Charles ^{[1
]}

Thevenaz, Luc ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Inst Elect Engn, CH-1015 Lausanne, Switzerland

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2010年 / 28卷 / 20期

基金：

以色列科学基金会;

关键词：

Brillouin echoes; distributed fiber sensor; fiber optics sensors; stimulated Brillouin scattering; DISTRIBUTED-TEMPERATURE; SENSOR;

D O I：

10.1109/JLT.2010.2073443

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：

High spatial (similar to cm) and spectral (similar to MHz) resolution Brillouin sensing is realized with enhanced signal to noise ratio using a pre-activated acoustic field and an optical phase control over the interrogating pulse. Pre-activation of the acoustic field preserves the Brillouin natural linewidth and a differential gain technique extends the method to long ranges. Experimentally, fully resolved measurements of the Brillouin frequency shift of a 5 cm spot perturbation at the far end of a 5 km fiber have been performed with a frequency resolution of 3 MHz (2 sigma), using a 500 ps (5 cm) pi phase shift pulse.

引用

页码：2993 / 3003

页数：11

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