摘要
基于折射率的精准检测在各个领域应用广泛,光纤折射率传感器发展迅速,其中基于MZI的PCF传感结构由于制作简单和体小质轻等优点在该领域受到更多的青睐。为了提高光纤折射率传感器的灵敏度和可操作性,设计了一种Z型的SPS光纤折射率传感器结构,将单模光纤与光子晶体光纤分别错位熔接,大大提高了光耦合能力和分束效能。使用新型溶液通量控制设备来改变周围环境的折射率,将光纤传感部分放置在该设备中,观察光谱随外界折射率的改变并进一步拟合。实验结果表明,该传感器在20℃恒定温度时,谐振谷波长和折射率之间具有很好的线性关系,拟合度达到0.986。当折射率在1.339~1.347变化时,折射率灵敏度为169.63928 nm/RIU。
Precision measurement based on refractive index has been widely used in various fields,and fiber refractive index sensors have developed rapidly.Among them,The PCF sensor structure based on MZI has attracted more attention in this field due to its advantages of simple fabrication,small size and light weight.In order to improve the sensitivity and maneuverability of the fiber refractive index sensor,a Z-type SPS fiber refractive index sensor structure is designed in this paper.Single mode fiber and photonic crystal fiber are misaligned and fused respectively,which greatly improves the optical coupling ability and beam splitting efficiency.A new solution flux control device is used to change the refractive index of the surrounding environment.The optical fiber sensor part is placed in the device to observe the change of the spectrum with the refractive index of the outside and further fit.The experimental results show that the sensor has a good linear relationship between the wavelength of the resonant valley and the refractive index at a constant temperature of 20℃with a fitting degree of 0.986.When the refractive index varies from 1.339 to 1.347,the refractive index sensitivity is 169.63928 nm/RIU.
作者
高朋
郑晓琳
刘莹
王子木
GAO Peng;ZHENG Xiaolin;LIU Ying;WANG Zimu(College of Physical Science and Technology, Shenyang Normal University, Shenyang 110034, China)
出处
《沈阳师范大学学报（自然科学版）》
CAS
2021年第6期506-510,共5页
Journal of Shenyang Normal University:Natural Science Edition
基金
国家自然科学基金资助项目(61603265)
辽宁省教育厅科学研究经费项目(LQN202003)。
关键词
光纤传感器
光子晶体光纤
折射率测量
马赫曾德干涉
optical fiber sensor
photonic crystal fiber
refractive index measurement
Mach-Zehnder interference
