Ferreira Marta S, Bierlich Jörg, Kobelke Jens, Pinto João L, Wondraczek Katrin
Opt Express. 2021 Feb 15;29(4):5808-5818. doi: 10.1364/OE.412532.
Three different types of strain and temperature sensors based on negative curvature hollow core fiber (NCHCF) are proposed. Each sensor is produced by splicing a small section of the NCHCF between two sections of single mode fiber. Different types of interferometers are obtained simply by changing the splicing conditions. The first sensor consists on a single Fabry-Perot interferometer (FPI). The remaining two configurations are attained with the same sensing structure, depending on its position in relation to the interrogation setup. Thus, a double FPI or a hybrid sensor, the latter being composed by an FPI and a Michelson interferometer, are formed. The inline sensors are of submillimeter size, thus enabling nearly punctual measurements.
提出了三种基于负曲率空心光纤（NCHCF）的不同类型的应变和温度传感器。每个传感器通过在两段单模光纤之间熔接一小段NCHCF来制造。通过改变熔接条件可简单地获得不同类型的干涉仪。第一个传感器由单个法布里-珀罗干涉仪（FPI）组成。其余两种配置通过相同的传感结构实现，这取决于其相对于询问装置的位置。因此，形成了一个双FPI或一个混合传感器，后者由一个FPI和一个迈克尔逊干涉仪组成。在线传感器尺寸为亚毫米级，因此能够进行几乎逐点的测量。
