摘要
研究了基于波长调制的螺旋形塑料光纤(plastic optical fiber, POF)表面等离子体共振(surface plasmon resonance, SPR)折射率传感器。采用机械热压和扭曲法将塑料光纤制备成螺旋形,在螺旋形POF上通过磁控溅射蒸镀一定厚度(约50 nm)的金属薄膜来激励SPR效应,从而形成螺旋形POF-SPR传感器。通过对螺旋形POF-SPR传感器的结构进行修饰,研究不同结构参数对折射率传感特性的影响。实验结果表明:由厚度为500μm扁平形POF扭制、螺纹数为4的螺旋形POF-SPR传感器具有较好的线性度和折射率传感特性,在折射率为1.335~1.400范围内测得的灵敏度为1 262 nm/RIU。该传感器具有成本较低、制备简单、结构稳定等优点。
A spiral-shaped plastic optical fiber(POF) surface plasmon resonance(SPR) refractive index sensor based on wavelength modulation was studied. First, the plastic optical fiber was prepared into a spiral by mechanical hot pressing and deforming method, and then a metal film with a certain thickness(about 50 nm)was deposited on the spiral-shaped POF by magnetron sputtering to stimulate the SPR effect, thereby forming a spiral-shaped POF-SPR sensor. By modifying the structure of the spiral-shaped POF-SPR sensor, the effects of different structural parameters on the refractive index sensing properties were studied. The experimental results show that the spiral-shaped POF-SPR sensor deforming from a flat POF with a thickness of 500 μm and a thread number of 4 has the better linearity and refractive index sensing characteristics, and the measured sensitivity in the refractive index range of 1.335~1.400 is 1 262 nm/RIU. The proposed sensor has the advantages of low cost, simple preparation and stable structure.
作者
徐跃
薛鹏
张瑞
陈媛媛
XU Yue;XUE Peng;ZHANG Rui;CHEN Yuanyuan(School of Information and Communication Engineering,North University of China,Taiyuan 030051,China;School of Electrical and Control Engineering,North University of China,Taiyuan 030051,China;Institute of Frontier and Interdisciplinary Science,North University of China,Taiyuan 030051,China;Shanxi Province Optoelectronic Information and Instrument Engineering Technology Research Center,Taiyuan 030051,China)
出处
《应用光学》
CAS
北大核心
2023年第1期226-233,共8页
Journal of Applied Optics
基金
山西省基础研究计划资助项目(20210302124269)
国家自然科学基金(62105302)
国家自然科学基金面上项目(201901D111145)。
关键词
塑料光纤
螺旋形
折射率传感
表面等离子体共振
plastic optical fiber
spiral
refractive index sensor
surface plasmon resonance