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基于熔融拉锥的高灵敏干涉型微光纤氨气传感器

High Sensitivity Interferometric Microfiber Ammonia Sensor Based on Optical Fiber Taper

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摘要

利用光纤火焰熔融拉锥法, 制作了一种高灵敏微光纤氨气(NH3)传感器.该传感器将一段长度为10 mm的保偏光纤接入普通单模光纤中, 通过光纤火焰熔融拉锥机将保偏光纤熔融拉伸至直径为8.33 μm制作而成.该结构基于马赫-曾德干涉仪的原理, 利用保偏光纤纤芯模与包层模相互作用实现模间干涉.外界环境中NH3浓度变化时, 细锥区倏逝场发生变化, 通过检测透射谱中波长的漂移, 实现传感器对环境中NH3浓度的测量.实验结果表明, 当NH3 浓度由8 ppm~56 ppm变化时, 透射谱向长波方向移动约5 nm, 且NH3浓度与波长漂移成二次拟合.在NH3浓度为32 ppm~56 ppm变化时, 可将NH3浓度与波长漂移近似看成线性关系, 此时传感器的灵敏度为176.08 pm/ppm.该传感器具有体积小, 制作简单, 灵敏度高等优点, 可用于不同领域的NH3传感测量.

Abstract

A highly sensitive microfiber ammonia (NH3) sensor was fabricated by means of flame melting taper in this paper. The sensor is fabricated by splicing a length of 10 mm Polarization Maintaining Fiber (PMF) in the middle of ordinary Single Mode Fibers (SMF), stretching the PMF down to microscale with diameter of 8.33 μm by using optical fiber melt tapering machine. Based on the principle of Mach-Zehnder Interferometer (MZI), this structure utilizes the interaction of PMF core and cladding modes to achieve inter-mode interference. When the NH3 concentration changes in the external environment, the evanescent field in the cone area changes. By detecting the wavelength shift of the transmission spectrum, the concentration of ammonia can be measured by fabricated sensors in this paper. The experimental result shows that the sensor has a quadratic corelation to ammonia concentration in the range of 8 ppm-56 ppm, and the wavelength shift about 5nm in the direction of the long wave. The experimental result also shows that the sensor has a linear corelation to ammonia concentration with sensitivity of 176.08 pm/ppm in the range of 32 ppm-56 ppm. The sensor has the advantages of small size, easy fabrication and high sensitivity making it a good candidate for NH3 sensor in different fields.

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中图分类号:TN253

DOI:10.3788/gzxb20184703.0306002

基金项目:陕西省自然科学基础研究计划(No.2016JQ6021),西安石油大学研究生创新与实践能力培养项目(No.YCS17111019)资助

收稿日期:2017-10-07

修改稿日期:2017-11-23

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作者单位    点击查看

张敏:西安石油大学 理学院 光电油气测井与检测教育部重点实验室, 西安 710065
傅海威:西安石油大学 理学院 光电油气测井与检测教育部重点实验室, 西安 710065
丁继军:西安石油大学 理学院 光电油气测井与检测教育部重点实验室, 西安 710065
李辉栋:西安石油大学 理学院 光电油气测井与检测教育部重点实验室, 西安 710065
张静乐:西安石油大学 理学院 光电油气测井与检测教育部重点实验室, 西安 710065
朱艺:西安石油大学 理学院 光电油气测井与检测教育部重点实验室, 西安 710065
邵敏:西安石油大学 理学院 光电油气测井与检测教育部重点实验室, 西安 710065

联系人作者:张敏(296892337@qq.com)

备注:张敏(1991-), 女, 硕士研究生, 主要研究方向为光纤传感技术.

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引用该论文

ZHANG Min,FU Hai-wei,DING Ji-jun,LI Hui-dong,ZHANG Jing-le,ZHU Yi,SHAO Min. High Sensitivity Interferometric Microfiber Ammonia Sensor Based on Optical Fiber Taper[J]. ACTA PHOTONICA SINICA, 2018, 47(3): 0306002

张敏,傅海威,丁继军,李辉栋,张静乐,朱艺,邵敏. 基于熔融拉锥的高灵敏干涉型微光纤氨气传感器[J]. 光子学报, 2018, 47(3): 0306002

被引情况

【1】张何丽,姜欢,张冰,任一涛. 集成光波导干涉芯片的设计及特性研究. 光子学报, 2019, 48(1): 123002--1

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