@article{._._2019, title={Optimization of Bending Angle of Fiber Optic Sensor for Non-Invasive Blood Glucose Measurement}, volume={4}, url={https://knepublishing.com/index.php/KnE-Engineering/article/view/4440}, DOI={10.18502/keg.v1i2.4440}, abstractNote={<p>The angle of fiber optic bending has been optimized to obtain the highest sensitivity and accuracy of blood glucose level sensor. The bending angle was varied between 0 ∘ (straight sensor) and 180∘ (u-shaped sensor) with a step of 30∘ . The fiber optic was used to guide light from red diode laser source (λ=650 nm) to a photodiode detector. Interactions of evanescent wave and glucose molecules in urine were enhanced by partial removing of fiber optic cladding. The length of fiber optic cladding removal was varied between 1 – 5 cm with a step of 1 cm. The difference in evanescent wave penetration depth as bending angle and cladding removal influences the sensitivity and the accuracy of the designed sensor. The highest sensitivity of 0,37 mV/(mg/dL) was obtained for sensor bending angle of 180∘ and the length of cladding removal of 3 cm. The sensitivity increases with the fiber optic bending angle. The designed sensors show measurement accuracy well above 90%. Clarke error grid analysis indicates that all of the measured data lie within the area of small error meaning that the developed blood glucose sensor is accurate and reliable.</p> <p>&nbsp;</p> <p>&nbsp;</p> <p>Keywords: blood glucose sensor, bending angle, evanescent wave, sensitivity, accuracy</p&gt;}, number={2}, journal={KnE Engineering}, author={., Ikhsan and ., Muldarisnur}, year={2019}, month={Apr.}, pages={148–156} }