应用科学学报 ›› 2022, Vol. 40 ›› Issue (6): 896-905.doi: 10.3969/j.issn.0255-8297.2022.06.002

• 通信工程 • 上一篇    

用于Hg2+浓度检测的S型光纤包层SPR传感器

魏勇1, 赵晓玲1, 王锐1, 刘春兰1, 张永慧2   

  1. 1. 重庆三峡学院 电子与信息工程学院, 重庆 404100;
    2. 重庆三峡医药高等专科学校 三峡库区道地药材开发利用重庆市重点实验室, 重庆 404020
  • 收稿日期:2022-06-13 发布日期:2022-12-03
  • 通信作者: 魏勇,副教授,研究方向为光纤SPR传感。E-mail:weiyong@hrbeu.edu.cn E-mail:weiyong@hrbeu.edu.cn
  • 基金资助:
    国家自然科学基金(No.61705025);重庆市自然科学基金(No.cstc2019jcyj-msxmX0431);三峡库区地质环境监测与灾害预警重点实验室资助课题(No.ZD2020A0102,No.ZD2020A0103);重庆市研究生科研创新项目(No.CYS21485);重庆三峡学院研究生科研创新项目(No.YJSKY21014)资助

S-Type Fiber Cladding SPR Sensor for Hg2+ Concentration Detection

WEI Yong1, ZHAO Xiaoling1, WANG Rui1, LIU Chunlan1, ZHANG Yonghui2   

  1. 1. College of Electronic&Information Engineering, Chongqing Three Gorges University, Chongqing 404100, China;
    2. Chongqing Key Laboratory of Development and Utilization of Genuine Medicinal Materials in Three Gorges Reservoir Area, Chongqing Three Gorges Medical College, Chongqing 404020, China
  • Received:2022-06-13 Published:2022-12-03

摘要: 光纤包层型表面等离子体共振(surface plasmon resonance,SPR)传感器不需去除包层,可用于生化传感,但该传感器存在结构种类较少的问题。为此该文提出一种基于S型光纤的新型包层SPR传感器结构,利用电熔技术制作S型光纤,在S型结构后面的包层表面镀制50nm金膜,实现纤芯中的光耦合至包层,然后与包层表面金膜接触,构成光纤包层型SPR传感器,最后实现了Hg2+浓度检测。在5pmol/L~5mmol/L的浓度检测范围内,SPR共振谷波长由633.03nm移动至645.09nm,检测灵敏度达1.382nm/lg(mmol/L)。S型光纤包层SPR传感器制作简单,可用于单模、多模光纤以实现包层SPR传感,尤其适用于生化检测领域。

关键词: S型光纤, 光纤表面等离子体共振传感, 包层型SPR传感, 重金属离子检测

Abstract: Fiber cladding surface plasmon resonance (SPR) sensors can be employed in biochemical sensing without the requirement of cladding removal, but with the limitation of lack of architectural variety. In this paper, a new type of cladding SPR sensor construction based on S-type fiber is proposed. The S-type fiber is first fabricated by electrofusion technology, and then coated with a 50 nm gold film on its cladding surface. In the S-type fiber, light is coupled from the fiber core to the cladding, and contacted with the gold film on the cladding surface to form a fiber cladding SPR sensor, thus, realizing the detection of Hg2+ molar concentration. The resonance valley wavelength of the SPR sensor changes from 633.03 nm to 645.09 nm as the Hg2+ molar concentration increasing from 5 pmol/L to 5 mmol/L. The detection sensitivity reaches 1.382 nm/lg(mmol/L). The manufacture of S-type fiber cladding SPR sensor features with simplicity and can be used for single-mode and multi-mode optical fibers to realize cladding SPR sensors which are especially useful in the field of biochemical detection.

Key words: S-type fiber, optical fiber surface plasmon resonance (SPR) sensing, cladding SPR sensing, heavy metal ion detection

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