论文部分内容阅读
研究介绍了一种基于表面等离子体共振(SPR)原理,对氢气浓度变化有较高灵敏度的基于银/钯复合膜的光纤氢气传感器。通过对建立侧边抛磨“D”型光纤的光学模型用Mode-Sloutions软件进行数值仿真,结果表明侧边抛磨光纤SPR模式的有效折射率随感应区的折射率增加而增加,随包层材料的厚度增加而减小。实验结果表明,感应区氢气体积分数为4%时,光纤输出的透射功率变化可达130nW。这种Pd/Ag复合膜光纤SPR氢敏传感器不仅改善了氢敏传感器的敏感膜的稳定性,而且灵敏度也提高了,对于制备新型、优化的化学和生物传感器件有参考意义。
In this paper, a silver / palladium composite membrane-based optical fiber hydrogen sensor based on the surface plasmon resonance (SPR) principle and high sensitivity to hydrogen concentration variation is introduced. The numerical simulation of the optical model of the side-polished “D” optical fiber by Mode-Sloutions software shows that the effective refractive index of the side polished optical fiber SPR mode increases with the increase of the refractive index of the sensitive region The thickness of the clad material increases and decreases. The experimental results show that the transmission power of the optical fiber output changes up to 130nW when the volume fraction of hydrogen in the induction zone is 4%. The Pd / Ag composite membrane SPR hydrogen sensitive sensor not only improves the stability of the sensitive membrane of the hydrogen sensitive sensor, but also improves the sensitivity, which is of reference value for preparing new and optimized chemical and biological sensing devices.