100km BOTDA temperature sensor with sub-meter resolution
100km BOTDA temperature sensor with sub-meter resolution
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DOI：
10.1117/12.974934
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发表时间：
2012-10
期刊：
影响因子：
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通讯作者：
X. Angulo-Vinuesa;S. Martín-López;P. Corredera;M. González-Herráez
中科院分区：
文献类型：
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作者：
X. Angulo-Vinuesa;S. Martín-López;P. Corredera;M. González-Herráez
由于诸如光纤衰减、自相位调制、损耗、分辨率-不确定性权衡等众多因素，无法轻易实现2米分辨率以下的长距离（> 70 km）布里渊光时域分析（BOTDA）中的温度或应变感测，在本文中，我们表明，结合拉曼援助和差分脉冲宽度对（DPP）技术亚，在100 km的传感范围内，BOTDA可实现测量分辨率。我们成功地证明了沿光纤沿着最差对比度位置的0.5米热点的检测。
Temperature or strain sensing in long-range (> 70 km) Brillouin Optical Time Domain Analysis (BOTDA) below 2 meter resolution cannot be trivially achieved due to numerous matters such as fiber attenuation, self-phase modulation, depletion, resolution-uncertainty trade-offs, etc. In this paper we show that combining Raman assistance and the Differential Pulse-width Pair (DPP) technique sub-metrical resolution is achievable in a BOTDA over 100 km sensing range. We successfully demonstrate the detection of a 0.5 meter hot-spot in the position of worst contrast along the fiber.