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提出一种基于白光干涉原理的新型微纳光纤传感器,并利用该传感器测量不同浓度的葡萄糖溶液引起的折射率的微小变化,通过数值求解麦克斯韦方程获得微纳光纤信号光的相位变化与外界溶液的折射率变化关系。实验测量结果证明利用该传感器获得的测量值与理论值基本一致。所设计的传感器具有灵敏度高、结构紧凑、易于和其他光电器件集成等优点。
A novel micro-nano optical fiber sensor based on the theory of white light interference was proposed. The sensor was used to measure the small change of refractive index caused by different concentrations of glucose solution. The phase change of the signal light of micro-nano fiber was obtained by numerical solution of Maxwell’s equation. The relationship between refractive index changes. Experimental results show that the measured value obtained with the sensor is basically consistent with the theoretical value. The designed sensor has the advantages of high sensitivity, compact structure and easy integration with other optoelectronic devices.