基于微结构光纤的表面等离子共振复用传感器的研究

项目名称： 基于微结构光纤的表面等离子共振复用传感器的研究

项目编号： No.61307097

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 王文辕

作者单位： 河北联合大学

项目金额： 26万元

中文摘要： 基于微结构光纤的表面等离子体共振（SPR）传感器，不仅易于使导模与表面等离子体模之间的相位匹配条件得到满足，而且可以通过调节光子晶体光纤的结构参数，增强倏逝场强度，加大倏逝场进入被测对象中的深度，从而提高SPR传感器的灵敏度。本研究针对目前对高精度折射率变化测量的需求，首先通过分析微结构光纤的结构参数引起SPR传感器特性变化的机理，设计增大微结构光纤倏逝场强度的结构参数；其次为增大传感器的动态范围，采取混合金属膜对光纤进行涂覆，分析混合金属膜材料组分、各金属材料的配比及镀膜方式与SPR传感器特性之间的关系；最后研究微结构光纤SPR传感器的复用形式，探索此类传感器的复用与解调技术。本研究将着重研究微结构光纤的结构参数和混合金属膜的特性影响SPR传感器的灵敏度和测量动态范围的机理，并探索其复用机制与解调技术，对医疗诊断、食品安全和环境监测等领域的高精度及分布式传感具有重要的理论价值和实际意义。

中文关键词： 光纤SPR传感器；多层金属薄膜；微结构光纤；传感器复用；

英文摘要： Microstructured optical fiber (MOF)-based surface plasmon resonance (SPR) sensor, which could not only easily satisfies the phase matching condition of guided mode with surface plasmon mode, also increase the sensitivity of the SPR sensor with increasing penetration depth of evanescent wave into analyte by designing the MOF. In order to meet the demands of high resolution refractive index measurement, firstly, MOF is designed to increase intensity of the evanescent wave and the mechanism is analysed of the MOF structure affecting the characteristic of SPR sensor. Secondly, a hybrid mental film is coated on the fiber to extend the dynamic range of SPR senors. The relationship is investigated between the components, ratio and coating method of the mental film with characteristic of the SPR sensor.Lastly,the multiplexing of the optical fiber-based SPR sensor is studied, and the demultiplexed method is researched. The key point of the study is to research the influenc of structure of MOF and characteristic of the hybrid mental film on the sensitivity and dynamic range of MOF-based SPR sensor, and to probe the multiplexing principle and demultiplexed method of MOF-based SPR sensor. The theoretical value and practical significance is important for the high resolution and distributed sensing area, including medical dia

英文关键词： optical fiber SPR sensor；metal multi-thin films；microstructured optical fiber；multiplexed sensors；