Glucose Sensor Based on Planar Optical Waveguides

In this paper, a new glucose sensors based on planar optical waveguides are proposed which can measure the concentration of sample solutions. The waveguide was fabricated with 3 layers, that is, the substrate, the waveguide layer and sample layer. We applied the sensor to red colored glucose solutions. In this experiment, we found that this thin-film waveguide sensor possessed high sensitivity at 488 nm of argon laser. In addition, our glucose sensor could be measured a wide range of glucose concentrations from 0 mmol/L 110 mmol/L.