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基于模式耦合理论,使用结构化光纤Bragg光栅(FBG)对蔗糖溶液温度和介质折射率进行测量,解决了外部介质折射率参数对温度测量的交叉影响。同时采用FBG传感矩阵进行分布式测量,可实现对非均匀溶液的温度和折射率测量。采用结构化FBG传感阵列的方式,实现了具有温度补偿功能的介质折射率分布式测量方案。温度测量灵敏度达到8.5pm/℃,介质折射率测量灵敏度达到5.42nm/riu。因此,采用结构化FBG传感矩阵对于解决化学生物传感器的多参数交叉影响和实现分布式测量具有一定意义。
Based on the model coupling theory, structured fiber Bragg grating (FBG) was used to measure the temperature of the sucrose solution and the refractive index of the medium, which solved the influence of the refractive index of the external medium on the temperature measurement. Simultaneous FBG sensing matrix for distributed measurements enables temperature and refractive index measurements of non-uniform solutions. Structured FBG sensing array is adopted to realize distributed measurement of refractive index of medium with temperature compensation function. Temperature measurement sensitivity reached 8.5pm / ℃, medium refractive index measurement sensitivity of 5.42nm / riu. Therefore, the use of structured FBG sensor matrix is of great significance for solving the multi-parameter cross-over effects of chemical biosensors and realizing distributed measurement.