基于微纳光纤耦合器的折射率传感研究

doi:10.16088/j.issn.1001-6600.2022061006

广西师范大学学报（自然科学版） ›› 2023, Vol. 41 ›› Issue (3): 31-40.doi: 10.16088/j.issn.1001-6600.2022061006

基于微纳光纤耦合器的折射率传感研究

凌湛钧¹, 李宏韬^1,2,3,4*, 陆杭林⁴, 付顾睿¹, 黄天启^1,2,3, 吕亮^1,2,3, 俞本立^1,2,3

1.安徽大学物理与光电工程学院, 安徽合肥 230601;
2.安徽省信息材料与智能感知实验室(安徽大学),安徽合肥 230601;
3.光电信息获取与控制教育部重点实验室(安徽大学),安徽合肥 230601;
4.广西核物理与核技术重点实验室(广西师范大学), 广西桂林 541004

收稿日期:2022-06-10 修回日期:2022-07-21 出版日期:2023-05-25 发布日期:2023-06-01
通讯作者: 李宏韬(1991—), 男, 河南信阳人, 安徽大学副教授, 博士。E-mail: htli@ahu.edu.cn
基金资助:
国家自然科学基金(62105001,61505001,61307098,61741501); 安徽省高校协同创新计划(GXXT-2020-050); 安徽省自然科学基金(2008085MF207); 安徽省科学研究与技术带头人基金会(2017H124); 安徽省高校自然科学基金(KJ2018ZD002); 广西核物理与核技术重点实验室开放课题(NLK2021-11); 广西高校中青年教师科研基础能力提升项目(RZ2200001612)

Research on Refractive Index Sensing Based on Micro-nano Fiber Coupler

LING Zhanjun¹, LI Hongtao^1,2,3,4*, LU Hanglin⁴, FU Gurui¹, HUANG Tianqi^1,2,3, LÜ Liang^1,2,3, YU Benli^1,2,3

1. School of Physics and Optoelectronics Engineering, Anhui University, Hefei Anhui 230601, China;
2. Information Materials and Intelligent Sensing Laboratory of Anhui Province(Anhui University), Hefei Anhui 230601, China;
3. Key Laboratory of Opto-Electronic Information Acquisition and Manipulation of Ministry of Education(Anhui University), Hefei Anhui 230601, China;
4. Guangxi Key Laboratory of Nuclear Physics and Nuclear Technology(Guangxi Normal University), Guilin Guangxi 541004, China

Received:2022-06-10 Revised:2022-07-21 Online:2023-05-25 Published:2023-06-01

摘要/Abstract

摘要： 目前一些超细直径的微纳光纤耦合器虽具有极高的灵敏度,然而极细的直径亦使得这些光纤耦合器非常脆弱,使得在传感应用中可能会产生一些问题:很难将这种耦合器从实验制造平台转移到微流控生物传感器中;易受环境影响而不够稳定。为了解决上述问题,分别从实验和理论上研究一种直径为6.25 μm的微纳光纤耦合器,这种光学耦合器在外部折射率(refractive index, RI)为1.339 8时能达到-1 753 nm/RIU的高折射率灵敏度。基于有限元分析方法(finite element method, FEM),计算出偶/奇模的有效折射率和折射率灵敏度并与实验测试结果比对。本文制作的光纤耦合器可以很好地运用在光纤微流控生物传感等其他实验室芯片上的多功能传感中,有良好的实用前景。

关键词: 光纤, 耦合器, 折射率灵敏度, 有限元分析, 稳定性

Abstract: Although some conventional high-sensitivity optical microfiber couplers with ultra-thin diameter have been reported, the reported optical microfiber couplers with very fragile properties can pose great challenges in real sensing applications. In order to address the above problem, an optical microfiber coupler with a broad diameter of 6.25 μm was studied experimentally and theoretically. This optical microfiber coupler can achieve a high refractive-index sensitivity of-1 753 nm/RIU at the external refractive index (RI) of 1.339 8 with good stability. Based on finite element method (FEM), and effective indices of even/odd modes and refractive index sensitivity can be calculated. By this way, the proposed optical microfiber coupler can find proper applications in fiber-optic micro-fluidic biosensor and lab-on-a-chip multifunctional sensing.

Key words: optical fibers, coupler, refractive index sensitivity, finite element method, good stability

中图分类号: TN253

凌湛钧, 李宏韬, 陆杭林, 付顾睿, 黄天启, 吕亮, 俞本立. 基于微纳光纤耦合器的折射率传感研究[J]. 广西师范大学学报（自然科学版）, 2023, 41(3): 31-40.

LING Zhanjun, LI Hongtao, LU Hanglin, FU Gurui, HUANG Tianqi, LÜ Liang, YU Benli. Research on Refractive Index Sensing Based on Micro-nano Fiber Coupler[J]. Journal of Guangxi Normal University(Natural Science Edition), 2023, 41(3): 31-40.

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基于微纳光纤耦合器的折射率传感研究

Research on Refractive Index Sensing Based on Micro-nano Fiber Coupler

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