光学学报, 2019, 39 (4): 0428001, 网络出版: 2019-05-10
基于Vernier效应的法布里-珀罗传感器增敏方法 下载: 1378次
Sensitivity Improvement of Fabry-Perot Sensor Based on Vernier Effect
传感器 双法布里-珀罗腔 分离型 高灵敏度 移植性好 温度交叉敏感 sensors double Fabry-Perot cavity separation type high sensitivity good portability temperature cross sensitivity
摘要
设计了一种分离型光纤传感增敏结构,并联连接两个腔长相近的法布里-珀罗(F-P)腔。理论分析了此结构的增敏原理并制备了两组增敏结构。实验结果表明,增敏结构的压强灵敏度值由单F-P结构的4.85 nm/MPa提高到43.95 nm/MPa,温度灵敏度由单F-P腔的0.0675 nm/℃提高至0.40364 nm/℃,在相同温度下采用双腔结构可消除温度交叉敏感对测量结果的影响。此结构克服了集成式增敏结构的缺陷,在不影响原传感器结构的情况下提高了灵敏度,且可通过更换辅助腔来调节灵敏度,具有移植性好和交叉敏感小等优势。
Abstract
A separation type fiber sensor structure is designed to improve sensitivity, in which double Fabry-Perot (F-P) cavities with similar cavity lengths are connected in parallel. The sensitization principle of this structure is theoretically analyzed and two groups of sensitizing structures are prepared. The experimental results show that the pressure sensitivity of the sensitizing structure is increased to 43.95 nm/MPa from 4.85 nm/MPa of the single F-P structure. The temperature sensitivity is increased to 0.40364 nm/℃ from 0.0675 nm/℃ of the single F-P cavity. At the same temperature, the use of double cavity structure can eliminate the effect of temperature cross-sensitivity on measurement results. The structure overcomes the defects of integrated sensitization structure, and increases the sensitivity without affecting the original sensor structure. The sensitivity can be adjusted by replacing the auxiliary cavity. This structure has the advantages of good portability and small cross-sensitivity, etc.
刘燕燕, 刘磊, 刘雪强, 王燕涛, 张鑫, 王明君, 齐跃峰. 基于Vernier效应的法布里-珀罗传感器增敏方法[J]. 光学学报, 2019, 39(4): 0428001. Yanyan Liu, Lei Liu, Xueqiang Liu, Yantao Wang, Xin Zhang, Mingjun Wang, Yuefeng Qi. Sensitivity Improvement of Fabry-Perot Sensor Based on Vernier Effect[J]. Acta Optica Sinica, 2019, 39(4): 0428001.