首页|基于混合干涉结构的光纤温盐深传感器设计

基于混合干涉结构的光纤温盐深传感器设计

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提出了一种基于法布里-珀罗干涉仪(FPI)级联马赫-曾德干涉仪(MZI)的混合干涉型光纤温盐深传感器.利用两段单模光纤与二氧化硅(SiO2)毛细管制作了 28 μm的FPI微腔.FPI导出单模光纤依次与大芯径多模光纤、细芯光纤对准熔接,并在细芯光纤后错位熔接单模光纤,FPI导出单模-多模-细芯-错位熔接单模构成MZI.对传感器的温度、折射率及深度响应特性进行了理论分析和实验研究,通过监测反射谱和透射谱,选取不同的特征波长.实验结果表明:FPI对折射率变化不敏感,温度和深度灵敏度为0.578 nm/℃和1.2972 nm/cm,MZI两个特征波谷对温度灵敏度分别为0.0524nm/℃和0.055 2 nm/℃,折射率灵敏度分别为-35.157nm/RIU和-27.581 nm/RIU,对深度变化不敏感.该传感器具有制作简单、成本低廉等优点.
Design of optical fiber temperature-salinity-depth sensor based on hybrid interference structure
A hybrid interferometric optical fiber temperature-salinity-depth sensor based on Fabry-Perot interferometer(FPI)cascaded Mach-Zehnder interferometer(MZI)is proposed.A 28 μm FPI micro cavity is fabricated by using two single-mode fiber and silica capillary.The single-mode fiber derived from FPI is aligned and fused with multi-mode fiber with large core diameter and fine-core fiber successively,and the single-mode fiber is misaligned and fused behind the fine-core fiber.The single mode-multimode-thin-core-misaligned fusion single mode fiber derived from FPI is composed of MZI.Theoretical analysis and experimental study are carried out on the temperature,refractive index and depth response characteristics of the sensor.By monitoring the reflection spectrum and transmission spectrum,different characteristic wavelengths are selected.Experimental results show that FPI is not sensitive to refractive index changes,and the sensitivity of temperature and depth is 0.578 nm/tC and 1.297 2 nm/cm.The sensitivity of two characteristic troughs of MZI to temperature is 0.052 4 nm/℃ and 0.0552 nm/℃,and the refractive index sensitivity is-35.157 nm/RIU and-27.581 nm/RIU,which is insensitive to depth change.The sensor has the advantages of simple fabrication and low cost.

optical fiber sensingFabry-Perot interferometer(FPI)Mach-Zehnder interferometer(MZI)temperaturerefractive indexdepth

张雨微、李永倩、姚国珍、赵旭、刘婷、武佳琪

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华北电力大学电子与通信工程系,河北保定 071003

华北电力大学河北省电力物联网技术重点实验室,河北保定 071003

华北电力大学保定市光纤传感与光通信技术重点实验室,河北保定 071003

光纤传感 法布里-珀罗干涉仪 马赫-曾德干涉仪 温度 折射率 深度

国家自然科学基金国家自然科学基金国家自然科学基金河北省自然科学基金中央高校基本科研业务费专项

617750576217118552177141F20195021122022MS079

2024

10.13873/J.1000-9787(2024)04-0088-04

传感器与微系统
中国电子科技集团公司第四十九研究所

传感器与微系统

CSTPCD北大核心
影响因子：0.61
ISSN：1000-9787
年,卷(期)：2024.43(4)
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