光纤生物传感器系统中光纤连接器的性能分析与优化设计

在已构建的全光纤结构生物传感器的基础上,对系统中关键器件--光纤连接器中的信号收集效率和噪声进行了理论分析.针对荧光信号传输的特点,采用光纤端面光强均匀分布的模型,运用重叠面积积分的方法推导出计算信号耦合效率的公式,计算了各种连接器结构下的信号耦合率,以求达到最好的接收效果.并分析了主要噪声的影响,通过建立的模型,给出了抑制噪声的方法和结构参数.最后根据实验得到的结果,分析了现有系统的连接器,并提出了改进方法.

The Optic-fiber Connector Analyse and Improvement of Optic Fiber Biosensor System

Based on the fiber optical immunoassay biosensor system, the optic-fiber connector is a very important component and the efficiency of collecting fluorescence signal of fibers and noise are analyzed with different construction. Taken into account the characteristic of fluorescence signal transmission, we calculate the signal coupling efficiencies in many structures of fiber connector using power equably distributing model and overlapping area integral, in order to achieve the best signal-receiving purpose. The influence of the primary noise is analyzed, and gained the methods and data to restrain the noise, the end, according the results of the experiment, the paper analyzes the optic-fiber connector of the existing system, and suggests some improving methods.