螺旋形塑料光纤表面等离子体共振折射率传感器 |
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引用本文: | 徐跃,薛鹏,张瑞,陈媛媛. 螺旋形塑料光纤表面等离子体共振折射率传感器[J]. 应用光学, 2023, 44(1): 226-233. DOI: 10.5768/JAO202344.0108002 |
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作者姓名: | 徐跃 薛鹏 张瑞 陈媛媛 |
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作者单位: | 1.中北大学 信息与通信工程学院,山西 太原 030051 |
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基金项目: | 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) |
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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。
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关 键 词: | 塑料光纤 螺旋形 折射率传感 表面等离子体共振 |
收稿时间: | 2022-03-18 |
Plasmon resonance refractive index sensor of spiral-shaped plastic optical fiber surface |
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Affiliation: | 1.School of Information and Communication Engineering, North University of China, Taiyuan 030051, China2.School of Electrical and Control Engineering, North University of China, Taiyuan 030051, China3.Institute of Frontier and Interdisciplinary Science, North University of China, Taiyuan 030051, China4.Shanxi Province Optoelectronic Information and Instrument Engineering Technology Research Center, Taiyuan 030051, China |
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Abstract: | 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. |
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