Shao Min, Liu Bingkun, Wang Yanmei, Liu Yinggang, Qiao Xueguang
Appl Opt. 2022 Dec 10;61(35):10439-10445. doi: 10.1364/AO.473164.
An optical fiber Fabry-Perot (FP) interferometric humidity sensor based on black phosphorus quantum dots (BPQDs) and polyvinyl alcohol (PVA) is proposed for the first time, to the best of our knowledge, and experimentally verified. The sensor is constructed by splicing a brief hollow core fiber (HCF) with a single-mode fiber (SMF) and filling the BPQDs-PVA compound into the HCF. When the proposed humidity sensor is placed in a humidity environment, BPQDs-PVA adsorbs water molecules in the air with increasing humidity, which changes the length of the FP cavity, as well as the refractive index of BPQDs-PVA, resulting in a spectral blueshift. The influence of the mixing ratio on humidity response properties has been experimentally investigated. A linear enhanced sensitivity of -0.7525 / within the humidity range of 45-75 %RH has been achieved. The maximum instability is 0.07 %RH in a long-term stability test, whereas the response and recovery times are 1.44 and 1.48 s, respectively.
据我们所知，首次提出并通过实验验证了一种基于黑磷量子点（BPQDs）和聚乙烯醇（PVA）的光纤法布里 - 珀罗（FP）干涉式湿度传感器。该传感器通过将一段短的空心光纤（HCF）与单模光纤（SMF）拼接，并将BPQDs - PVA复合物填充到HCF中构建而成。当所提出的湿度传感器置于湿度环境中时，随着湿度增加，BPQDs - PVA吸附空气中的水分子，这会改变FP腔的长度以及BPQDs - PVA的折射率，从而导致光谱蓝移。通过实验研究了混合比例对湿度响应特性的影响。在45 - 75%RH的湿度范围内实现了-0.7525 / 的线性增强灵敏度。在长期稳定性测试中，最大不稳定性为0.07%RH，而响应时间和恢复时间分别为1.44秒和1.48秒。
