A plastic optic fiber sensor with temperature compensation for glucose concentration measurement

Abstract

An optical fiber sensor based on a gradually hot-pressed flatted plastic optical fiber (GPF) and F-P interference structure is proposed to eliminate the effect of ambient temperature drift in the detection of glucose concentration. The sensing characteristics of the prepared sensing head were studied at various glucose concentrations and ambient temperatures. Based on the differential sensitivity of GPF and F-P interference film to glucose concentration and temperature, temperature-compensated glucose concentration sensing monitoring was obtained by the sensitivity matrix equation, where the peak wavelength of interference peak and transmitted light intensity were used as information carriers. The results show that the proposed plastic optical fiber sensor can provide the monitoring of glucose sample concentrations ranging from 0 to 500mg.ml-1, and the effect of ambient temperature drift is eliminated to make it more useful. Because of its simple structure, high repeatability, easy integration with the chip, and ability to eliminate the effect of temperature drift, the sensor has potential applications in biochemistry, medical diagnosis, and environmental monitoring.