Fiber and Integrated Optics Laboratory, Electronics Engineering Department, UAM Reynosa-Rodhe, Universidad Autónoma de Tamaulipas, Carr. Reynosa-San Fernando S/N, Reynosa, Tamaulipas 88779, Mexico.
Sensors (Basel). 2013 Oct 22;13(10):14200-13. doi: 10.3390/s131014200.
A simple and compact fiber optic sensor based on a two-core fiber is demonstrated for high-performance measurements of refractive indices (RI) of liquids. In order to demonstrate the suitability of the proposed sensor to perform high-sensitivity sensing in a variety of applications, the sensor has been used to measure the RI of binary liquid mixtures. Such measurements can accurately determine the salinity of salt water solutions, and detect the water content of adulterated alcoholic beverages. The largest sensitivity of the RI sensor that has been experimentally demonstrated is 3,119 nm per Refractive Index Units (RIU) for the RI range from 1.3160 to 1.3943. On the other hand, our results suggest that the sensitivity can be enhanced up to 3485.67 nm/RIU approximately for the same RI range.
我们展示了一种基于双芯光纤的简单紧凑的光纤传感器，用于高性能测量液体的折射率（RI）。为了证明所提出的传感器在各种应用中进行高灵敏度感应的适用性，我们已经使用该传感器来测量二元液体混合物的 RI。此类测量可以准确确定盐水溶液的盐度，并检测掺假酒精饮料的含水量。实验证明，RI 传感器的最大灵敏度为 3.119nm/RIU，RI 范围为 1.3160 至 1.3943。另一方面，我们的结果表明，对于相同的 RI 范围，灵敏度可以提高到大约 3485.67nm/RIU。
