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光纤表面等离子体共振传感器在高灵敏度传感和在线实时监测等领域具有重要意义.设计了一种六重准晶体结构环形通道光纤表面等离子体共振传感器,基于有限元法对该传感器的传感特性进行了数值模拟.研究了光纤各结构参量对传感器特性的影响规律.研究结果表明:待测液折射率的有效监测范围为1.25—1.331,最高灵敏度可达26400 nm·RIU-1,传感器具有损耗谱杂峰少、探测范围广、灵敏度高、设计灵活性高和光路可弯曲等特点,在生化检测、公共安全、环境污染监测以及高灵敏度传感等领域具有广泛的应用前景.
Fiber surface plasmon resonance sensor is of great significance in the fields of high sensitivity sensing and on-line real-time monitoring, etc. A six-quasi-quasi-crystal annular channel fiber surface plasmon resonance sensor is designed. Based on the finite element method, the sensing characteristic of the sensor The results show that the effective monitoring range of the refractive index of the liquid to be measured is 1.25-1.331, the highest sensitivity is 26400 nm · RIU-1, and the sensor has the characteristic of loss Less spectral spike, wide detection range, high sensitivity, high design flexibility and flexible optical path. It has wide application prospect in biochemical detection, public safety, environmental pollution monitoring and high sensitivity sensing.