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基于微纳光纤的布里渊折射率传感技术

Brillouin Refractive Index Sensing Technique Based on Micro-Nano Fiber

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摘要

利用微纳光纤的倏逝场效应,提出一种布里渊折射率传感器。利用混合声波模式激发的多峰布里渊频谱结构,实现了液体的折射率传感测量。实验结果发现,在氯化钠溶液中,长2 μm的微纳光纤在10.4 GHz左右的布里渊信号峰具有较好的信噪比,且该布里渊信号峰频移在一定范围内随液体折射率呈线性变化,在折射率范围为1.3333~1.3612时折射率传感灵敏度为369.6 MHz/RIU(RIU为折射率单元)。该技术为折射率传感提供了新的思路和方案。

Abstract

This study proposes a Brillouin refractive index sensor based on the evanescent field effect of a micro-nano fiber. Multipeak Brillouin spectrum caused by hybrid acoustic field of the fiber is used for liquid refractive index sensing. Experimental results show that, for a 2 μm-micro-nano fiber, Brillouin peaks at approximately 10.4 GHz have a relatively high signal-to-noise ratio in NaCl solution, and their frequency shifts have a linear dependence on the liquid refractive index. A refractive index sensing sensitivity of 369.6 MHz/RIU (RIU is refractivity unit) is obtained within the range of 1.3333-1.3612. The proposed sensor will provide a new alternative for refractive index sensing.

Newport宣传-MKS新实验室计划
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DOI:10.3788/LOP56.170626

所属栏目:功能光纤

基金项目:国家自然科学基金;

收稿日期:2019-03-25

修改稿日期:2019-04-09

网络出版日期:2019-09-01

作者单位    点击查看

黄晨辉:暨南大学光子技术研究院, 广东 广州 510632
秦莉:暨南大学光子技术研究院, 广东 广州 510632
梁浩:暨南大学光子技术研究院, 广东 广州 510632
程凌浩:暨南大学光子技术研究院, 广东 广州 510632

联系人作者:黄晨辉, 梁浩(154584790@qq.com, lianghao1509@gmail.com)

备注:国家自然科学基金;

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引用该论文

Chenhui Huang, Li Qin, Hao Liang, Linghao Cheng. Brillouin Refractive Index Sensing Technique Based on Micro-Nano Fiber[J]. Laser & Optoelectronics Progress, 2019, 56(17): 170626

黄晨辉, 秦莉, 梁浩, 程凌浩. 基于微纳光纤的布里渊折射率传感技术[J]. 激光与光电子学进展, 2019, 56(17): 170626

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