Ultra-high sensitivity Fabry-Perot interferometer gas refractive index fiber sensor based on photonic crystal fiber and Vernier effect
Ultra-high sensitivity Fabry-Perot interferometer gas refractive index fiber sensor based on photonic crystal fiber and Vernier effect
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DOI：
10.1364/ol.40.004891
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发表时间：
2015-11-01
期刊：
影响因子：
3.6
通讯作者：
Yao, Yong
中科院分区：
文献类型：
--
作者：
Quan, Mingran;Tian, Jiajun;Yao, Yong
提出并实现了一种基于光子晶体光纤(PCF)和游标效应的超高灵敏度开腔法布里-珀罗涉仪(FPI)气体折射率传感器。该传感器是通过将一段PCF拼接到一段与一段单模光纤融合的光纤管上而制成的。沿着PCF包层的气孔使气体能够自由地进入或离开腔体。利用PCF最后端面的反射光束产生游标效应，显著提高了传感器的灵敏度。实验结果表明，该传感器可以提供30899 nm/Riu的超高RI灵敏度。该传感器在气体浓度分析、湿度监测等领域具有潜在的应用前景。(C)2015年美国光学学会
An ultra-high sensitivity open-cavity Fabry-Perot interferometer (FPI) gas refractive index (RI) sensor based on the photonic crystal fiber (PCF) and Vernier effect is proposed and demonstrated. The sensor is prepared by splicing a section of PCF to a section of fiber tube fused with a section of single mode fiber. The air holes running along the cladding of the PCF enable the gas to enter or leave the cavity freely. The reflection beam from the last end face of the PCF is used to generate the Vernier effect, which significantly improves the sensitivity of the sensor. Experimental results show that the proposed sensor can provide an ultra-high RI sensitivity of 30899 nm/RIU. This sensor has potential applications in fields such as gas concentration analyzing and humidity monitoring. (C) 2015 Optical Society of America