基于倏逝波吸收的塑料光纤葡萄糖传感特性  

Glucose Evanescence Absorption Sensor by Using Plastic Optical Fiber

作　　者：初凤红[1] 王计元[1] 

机构地区：[1]上海电力学院计算机与信息工程学院,上海200090

出　　处：《中国激光》2012年第5期146-149,共4页Chinese Journal of Lasers

基　　金：国家自然科学基金(50903014);上海市自然科学基金(11ZR1414400)资助课题

摘　　要：利用塑料光纤作为传感和传光器件,以高亮度经正弦信号调制的蓝光LED为光源,基于倏逝波吸收原理进行葡萄糖浓度传感。实验研究了U形、双锥形、螺旋形传感头对不同质量浓度葡萄糖溶液的传感特性,实验结果为螺旋形传感头的灵敏度最高。螺旋形传感头的透射光功率与葡萄糖质量浓度之间呈线性关系,线性系数为0.986,系统的灵敏度为0.1μg/mL。实验还对螺旋形传感头在质量浓度分别为0mg/100mL和25mg/100mL葡萄糖溶液中透射光功率的重复性进行了测试,在5个循环内实验结果具有重复性。Glucose concentration is detected by using evanescent absorption method. Plastic optical fiber is used as sensor head and light transmit element. A high brightness blue LED modulated with sine signal is used as excitation source with spectrum centered at 470 nm. The sensitivity of the system under different shaped sensor heads （U- shaped, biconical-shaped, spiral-shaped） is measured, and the spiral-shaped sensor head shows the highest sensitivity to glucose. The relationship between the spiral-shaped output light power and glucose concentration is linearly and the linear coefficient is 0. 986. The sensitivity of the sensor head is 0. 1 μg/mL reversibility when the sensor is tested by alternately cycling between 0 mg/100 mL solution in five cycles. The system shows excellent and 25 mg/100 mL glucose

关 键 词：传感器 葡萄糖 塑料光纤 倏逝波 

分 类 号：TN252[电子电信—物理电子学] TP212.14[自动化与计算机技术—检测技术与自动化装置]