One-dimensional optical Bragg grating sensor for the detection of urine glucose concentration

In this work, a defect cavity layered Bragg reflector structure is proposed theoretically to find the presence of diabetes in the given sample. The modelling, design and analysis of the sensor is performed using the characteristic matrix method. The proposed structure has central defect cavity with 6 pairs of low–high refractive index (RI) regions on either side of cavity. To enhance the sensor sensitivity, the input incident light has a frequency in mid-infrared range. The RI of normal and diabetic patient’s urine glucose concentration is analysed to get performance of the sensor. MATLAB tool is used to design and simulate the proposed sensor. Novelty of the proposed structure includes use of simple 1D PC with very high sensitivity and Q factor. The obtained Q factor is 2898 and that of sensitivity is 4700 nm/RIU. The sensor proposed here is a best choice of optical sensor for the diabetes detection in the given test sample for accurate analysis in medical applications.