Optimizing Brillouin Optical Time-Domain Analyzers Based on Gain Spectrum Engineering

被引：0
|
作者：
Feng, Cheng [1 ]
Schneider, Thomas [1 ]
机构：
[1] Tech Univ Carolo Wilhelmina Braunschweig, THz Photon Grp, Braunschweig, Germany
来源：
JOVE-JOURNAL OF VISUALIZED EXPERIMENTS | 2020年 / 159期
关键词：
Engineering; Issue; 159; distributed fiber sensing; stimulated Brillouin scattering; Brillouin optical time-domain analyzer; gain spectrum engineering; noise; measurand resolution; BANDWIDTH REDUCTION; FREQUENCY-SHIFT; PULSE; PERFORMANCE; FILTER; ENHANCEMENT; INSTABILITY; SCATTERING; RESOLUTION; SYSTEMS;
D O I：
10.3791/61115
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Demonstrated is a unique method for sensing performance enhancement in Brillouin optical time-domain analyzers (BOTDA). A Brillouin gain spectrum (BGS) is superimposed with two symmetric Brillouin loss spectra (BLS). This leads to a complex engineered spectrum shape that is more resistant to the sensing system noise. Instead of only one pump and probe interaction as in the conventional BOTDA setup, three optical probe waves are exploited, with one probe located in the BGS and the other two symmetrically in the BLS. Due to the resistance and insensitivity of the engineered spectrum shape to the noise, the sensing performance is enhanced by 60% and the measurand resolution is doubled.
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页数：7
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