HIBISCUS: high sensitivity stimulated brillouin scattering sensors

该方案首次使用一种新的受激布里渊散射(SBS)方案将光纤传感器的分布式温度和应变传感(DTS)能力提高至少一个数量级。这项申请专利的技术有三个目的：1.提高DTS的真实灵敏度，2)降低DTS的成本，3)展示基于SBS的原型。布里渊频移是温度和应变的弱函数。通过使用高阶受激布里渊散射，我们最近证明了第N阶。阶斯托克斯波的频移是一阶斯托克斯频移的N倍。我们的目标是结合成熟的光学技术，将我们目前的非分布式传感方案转变为功能强大的高灵敏度和高空间分辨率的方案。我们的方法是基于比较感知，它补偿漂移，这在这样的DTS系统中是不可避免的。预计可在千米长的距离上进行传感，灵敏度为&lt；&lt；0.5m，分辨率为摄氏度以下。

This proposal is on increasing the distributed temperature and strain sensing (DTS) capability of optical fiber sensors by at least an order of magnitude using a novel stimulated Brillouin scattering (SBS) scheme for the first time. This technology, which is the subject of a filed patent, has three aims: 1. To enhance the true sensitivity of DTS, 2) reduce the cost of DTS and 3) to demonstrate a prototype based on SBS. The Brillouin frequency shift is a weak function of temperature and strain. By using higher order stimulated Brillouin scattering, we have recently shown that the Nth. order Stokes wave has N x the frequency shift of the 1st order Stokes shift. We aim to combine well established optical techniques to convert our current non-distributed sensing scheme into a powerful high sensitivity and high spatial resolution scheme. Our approach is based on comparative sensing, which compensates drift, inevitable in such DTS systems. Sensing over km long distances is anticipated with << 0.5m sensitivity with a resolution of sub-degree C.