Overcoming non-local effects and Brillouin threshold limitations in Brillouin distributed sensors

被引：1
|
作者：
Urricelqui, Javier [1 ]
Ruiz-Lombera, Ruben [2 ]
Sagues, Mikel [1 ]
Mirapeix, Jesus [2 ]
Lopez-Higuera, Jose M. [2 ]
Loayssa, Alayn [1 ]
机构：
[1] Univ Publ Navarra, Pamplona, Spain
[2] Univ Cantabria, E-39005 Santander, Spain
来源：
24TH INTERNATIONAL CONFERENCE ON OPTICAL FIBRE SENSORS | 2015年 / 9634卷
关键词：
Brillouin distributed sensors; Brillouin optical time domain analysis; Brillouin threshold; TIME-DOMAIN ANALYSIS; SCATTERING;
D O I：
10.1117/12.2205448
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：
We demonstrate, for the first time to our knowledge, a Brillouin optical time domain analysis sensor that is able to operate with a probe power larger than the Brillouin threshold of the deployed sensing fiber and that is free from detrimental non-local effects. The technique is based on a dual-probe-sideband setup in which a frequency modulation of the probes waves along the fiber is introduced. This makes the frequency of maximum interaction between pump and probes to vary along the fiber, thus mitigating the pump pulse depletion and making it possible to use very large probe power, which brings an improved signal-to-noise ratio in detection.
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页数：4
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