简单、紧缩的光纤维有温度的同时的测量的方向性的弯曲向量传感器基于 Mach-Zehnder 干涉仪(MZI ) 被建议并且试验性地示威了。设备由在二单个模式纤维(SMF ) 之间夹,侧面的偏移量拼接的一 photonic 水晶纤维(PCF ) 组成。它为认出积极、否定的方向显示出能力。在到 7.13 m -1, 的 -7.13 m -1 的一个弯曲范围以内,有相反的纤维取向的二反响的剧降的弯曲敏感被获得分别地是 0.484 nm/m -1 和 0.246 nm/m -1, 。这简单 MZI 被调用在 LP 01 和 LP 21 核心模式之间的干扰形成,它导致传感器不对周围的折射索引(ARI ) 敏感。温度敏感也被调查了。二剧降在温度上有显然不同的敏感并且弯曲,弯曲和温度的二个参数能被构造一个矩阵并且使用一简单模型干涉仪因此同时区分并且测量。
A simple and compact optical fiber directional bending vector sensor with simultaneous measurement of temperature based on the Mach-Zehnder interferometer (MZI) is proposed and experimentally demonstrated. The device consists of a piece of photonic crystal fiber (PCF) sandwiched between two single mode fibers (SMFs) with a lateral offset splicing. It shows the capacity for recognizing positive and negative directions. Within a curvature range of-7.13m-1 to 7.13 m-1, the bending sensitivities of two resonant dips with opposite fiber orientations are obtained to be 0.484 nm/m-1 and 0.246 nm/m-1, respectively. This simple MZI is formed by invoking interference between LP01 and LP21 core modes, which leads to that the sensor is not sensitive to ambient refractive index (ARI). The temperature sensitivity has also been investigated. Two dips have obviously different sensitivities on the temperature and bending, so two parameters of both curvature and temperature can be distinguished and measured simultaneously by constructing a matrix and using one simple model interferometer.