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.
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Yousufali, M., Mollah, M.A. & Ahmed, K. Multimode Interference-Based Photonic Crystal Fiber Glucose Sensor. Plasmonics 16, 811–818 (2021). https://doi.org/10.1007/s11468-020-01349-7
- Photonic crystal fiber
- Finite element method
- Transmittance spectrum