In this work, a photonic crystal fiber (PCF) glucose sensor having high sensitivity is proposed based on multimode interference (MMI). Guiding properties of the sensor are examined by the finite element method (FEM). Sensing properties of the sensor are evaluated based on the fiber properties such as birefringence, coupling length, and transmittance. Numerical investigation shows that the proposed sensor yields to promise an extremely high sensitivity of 50,505 nm/refractive index unit (RIU) and 6 nm/g/L with high linearity of 98.64%. Furthermore, the average sensitivity of the proposed sensor is also high as 30,890 nm/RIU and 3.67 nm/g/L in the glucose concentration (GC) range from 0 to 100 g/L. Moreover, the measurement resolution of the sensor is 0.54 mg/dL which is smaller than 70 mg/dL for efficient detection of hypoglycemia episodes. Owing to simple structure and high sensitivity with good resolution, this sensor can be applied for GC measurement effectively.

在这项工作中，提出了一种基于多模干扰（MMI）的具有高灵敏度的光子晶体光纤（PCF）葡萄糖传感器。传感器的引导特性通过有限元方法（FEM）进行检查。基于双折射，耦合长度和透射率等光纤特性评估传感器的感应特性。数值研究表明，所提出的传感器的产量有望达到50,505 nm /折射率单位（RIU）和6 nm / g / L的极高灵敏度，且线性度高达98.64％。此外，提出的传感器的平均灵敏度在0至100 g / L的葡萄糖浓度（GC）范围内也高达30,890 nm / RIU和3.67 nm / g / L。此外，传感器的测量分辨率为0.54 mg / dL，小于70 mg / dL，可有效检测低血糖发作。