Sensitive handheld refractometer by using combination of a tapered fiber tip and a multimode fiber
Sensitive handheld refractometer by using combination of a tapered fiber tip and a multimode fiber
复制标题
结合使用锥形光纤尖端和多模光纤的灵敏手持式折射仪
DOI：
10.1109/jlt.2020.3030897
复制
发表时间：
2020
影响因子：
4.7
通讯作者：
Wei Pei-Kuen
中科院分区：
文献类型：
--
作者：
Tai Yi-Hsin;Lo Shu-Cheng;Ho Ya-Lun;Delaunay Jean-Jacques;Wei Pei-Kuen
这项工作提出了一个敏感的手持式折射计使用锥形光纤尖端，多模光纤，和一个小镜子。采用改进的湿法刻蚀法制备了锥形纤维尖端。锥形光纤传输光的角强度分布对周围溶液的折射率很敏感。低角波被多模光纤反射和收集。通过设置较小的采集角和光纤与反射镜之间10mm的距离，最大光强灵敏度可达7.8 × 105%/RIU（折射率单位）。在0.25%激光强度稳定性下，传感器探头的传感器分辨率可达到8.7 × 10-5RIU。简单的手持式折射仪可用于测定各种液体的性质。对于手持式条件下的葡萄糖溶液测量，通过监测强度变化可以区分0到50°Bx。考虑手部振动和环境干扰，传感器分辨率为1.22°Bx。
This work presents a sensitive handheld refractometer using a tapered fiber tip, a multimode fiber, and a tiny mirror. The taper fiber tip was made using a modified wet etching method. The angular intensity distribution of the transmission light from the tapered fiber is sensitive to the refractive index of the surrounding solution. The low angular wave was reflected and collected by a multimode fiber. By setting a small collection angle and 10-mm distance between the fibers and the mirror, the maximum intensity sensitivity reaches up to 7.8 × 105%/RIU (refractive index unit). The sensor resolution of the sensor probe can achieve 8.7 × 10-5RIU under 0.25% laser intensity stability. The simple handheld refractometer can be used to determine the properties of various liquids. For the glucose solution measurement under handheld condition, 0 to 50 °Bx can be distinguished by monitoring the intensity change. Considering the hand vibration and environmental disturbance, the sensor resolution was 1.22 °Bx.