High-sensitive all-fiber fabry-perot interferometer gas refractive index sensor based on lateral offset splicing and Vernier effect
High-sensitive all-fiber fabry-perot interferometer gas refractive index sensor based on lateral offset splicing and Vernier effect
复制标题
基于横向偏移拼接和游标效应的高灵敏全光纤法布里-珀罗干涉仪气体折射率传感器
DOI：
10.1016/j.ijleo.2019.163181
复制
发表时间：
2019-11-01
期刊：
影响因子：
3.1
通讯作者：
Li, Linjun
中科院分区：
文献类型：
--
作者：
Yang, Yuqiang;Wang, Yongguang;Li, Linjun
提出并实现了一种基于横向偏置拼接和游标效应的高灵敏度全光纤开腔法布里-珀罗干涉仪气体折射率传感器。该传感器的制作是通过将一小段单模光纤（SMF）连接在引入SMF和一段具有特定长度的SMF之间，确保传感器由开放腔FPI和二氧化硅腔FPI组成。利用传感器最后一个端面的反射光产生游标效应，显著提高了传感器的灵敏度。该传感器成功地用于监测空气折射率随压力的变化，并通过跟踪游标效应引起的反射光谱包络的偏移，提供了-11368.5nm/RIU的高灵敏度和良好的线性。该传感器在气体成分检测、环境监测和生物传感等领域具有潜在的应用价值。
A high sensitivity all-fiber open-cavity Fabry-Perot interferometer gas refractive index (RI) sensor based on lateral offset splicing and Vernier effect is proposed and demonstrated. The sensor is fabricated by splicing a short section of single mode fiber (SMF) between the lead-in SMF and a section of SMF with a specific length, ensuring that the sensor consists of an open-cavity FPI and a silica-cavity FPI. The reflection beam from the last end face of the sensor is used to generate the Vernier effect, which significantly improves the sensitivity of the sensor. The sensor was successfully used to monitor changes of air RI as a function of pressure and provided a high sensitivity of -11368.5 nm/RIU with good linearity by tracing the shift of the reflection spectrum envelope caused by Vernier effect. This sensor has potential applications in fields such as gas composition detection, environmental monitoring, and biological sensing.