Au/Go Based Partially Uncladded SMF for Detection of Glucose Concentration

The determination of glucose concentrations in the blood and urine were important to monitor the health of human being. This study was carried out to study the effect GO thicknesses in enhancing the sensitivity of the Au/GO sensor for detection of glucose with various concentration. The partial unclad SMF was fabricated by using low-cost mechanical etching technique. The cladding thickness was successfully reduced from 125μm to 124μm by using this technique. To enhance the strength of evanescent field, Au nanoparticles were deposited on top of unclad fiber via drop casting method. To excite surface plasmon polaritons. GO with various layers from one to five layers were coated on the Au coated partial unclad SMF. The optimum sensitivity of the Au/GO SMF was resulted as three layers of GO with laser excitation under infrared range, λ=1310nm was employed. In conclusion, the effect of GO thicknesses mainly influenced the performance of the proposed sensor, in which the best thickness of GO to enhance the evanescent field and the excitation of SPP is three layers.