Double-pulse Brillouin distributed optical fiber sensors: analytical model and experimental validation

被引：6
|
作者：
Soto, Marcelo A. [1 ]
Chin, Sanghoon [2 ]
Thevenaz, Luc [1 ]
机构：
[1] SCI STI LT, Inst Elect Engn, EPFL Swiss Fed Inst Technol, Stn 11, CH-1015 Lausanne, Switzerland
[2] Omnisens SA, Riond Bosson 3, CH-1110 Morges, Switzerland
来源：
22ND INTERNATIONAL CONFERENCE ON OPTICAL FIBER SENSORS, PTS 1-3 | 2012年 / 8421卷
关键词：
Stimulated Brillouin scattering; distributed optical fiber sensor; temperature sensing; strain sensing; SPATIAL-RESOLUTION; BOTDA;
D O I：
10.1117/12.974964
中图分类号：
TP7 [遥感技术];
学科分类号：
081102 ; 0816 ; 081602 ; 083002 ; 1404 ;
摘要：
An analytical model is presented to describe the behavior of the acoustic wave, probe signal and Brillouin gain in double-pulse Brillouin optical time-domain analysis (DP-BOTDA) sensors. The proposed model is a tool that provides a full physical insight into the Brillouin interaction occurring in this double-pulse configuration, and allows the optimization and complete analysis of the system. The proposed solution is experimentally validated in a long-range system, which is optimized to demonstrate experimentally, for the first time, the capability of DP-BOTDA to achieve a 11 km sensing distance with 20 cm spatial resolution and a frequency resolution of 0.5 MHz.
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页数：4
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