School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, China.
National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150080, China.
Sensors (Basel). 2018 Jul 3;18(7):2145. doi: 10.3390/s18072145.
A novel twin-core photonic crystal fiber-based sensor for simultaneous measurement of curvature, strain and temperature is proposed. The fiber sensor is constructed by splicing the homemade twin-core photonic crystal fiber between two segments of single mode fiber. Affected by the coupling between two cores, the transmission spectrum of the fiber sensor has different wavelength responses to curvature, strain, and temperature. The maximal sensitivities to curvature, strain and temperature are 10.89 nm/m, 1.24 pm/με and 73.9 pm/°C, respectively. Simultaneous measurement of curvature, strain and temperature can be achieved by monitoring the wavelength shifts of selected valleys in the transmission spectrum. Contrast experiment based on traditional twin-core fiber is carried out. Experimental results demonstrate that twin-core photonic crystal fiber-based sensor has higher sensitivity and better linearity than traditional twin-core fiber-based sensor.
提出了一种基于新型双芯光子晶体光纤的传感器，用于同时测量曲率、应变和温度。该光纤传感器由两段单模光纤之间的自制双芯光子晶体光纤拼接而成。受两芯之间耦合的影响，光纤传感器的传输光谱对曲率、应变和温度具有不同的波长响应。对曲率、应变和温度的最大灵敏度分别为 10.89nm/m、1.24pm/με 和 73.9pm/°C。通过监测传输光谱中选定谷的波长移动，可以实现曲率、应变和温度的同时测量。进行了基于传统双芯光纤的对比实验。实验结果表明，与传统的双芯光纤传感器相比，双芯光子晶体光纤传感器具有更高的灵敏度和更好的线性度。
