摘要
为了深入探究七芯光子晶体光纤的传感特性,本利用有限元法研究七芯光子晶体对温度的传感特性,找到七芯光子晶体纤芯基模与包层高阶模的有效折射差与温度的关系,算出波谷波长与温度的变化关系,即理论灵敏度,并基于单模-七芯光子晶体-单模结构的马赫-曾德尔干涉结合水浴法进行温度传感实验检测。研究结果表明:七芯光子晶体光纤的理论灵敏值为-47.14 pm/℃,实验测出的灵敏度为-48.86 pm/℃。可以发现七芯光子晶体光纤对温度具有良好的线性传感特性,而且稳定性好、线性拟合度高、制作工艺简单,在海洋环境监测、生物制药和食品检测等领域具有良好的应用价值。
To better understand the sensing characteristics of the seven-core photonic crystal fiber,this study adopted the method of combining theory and experiment.The finite element method was used to evaluate the temperature sensing characteristics of the seven-core photonic crystal,and the relationship between the effective refraction difference under the basic mode of the seven-core photonic crystal core and the higher order mode of the cladding and the temperature was determined.Moreover,the relationship between the wavelength of the trough and the temperature,that is,theoretical sensitivity,was calculated.And it was based on the single-mode-seven-core photonic crystal-single-mode Mach-Zehnder interference combined with the water bath method to detect the temperature.The results indicate that the theoretically calculated sensitivity is-47.14 pm/℃,and the experimentally measured sensitivity is-48.86 pm/℃.The seven-core photonic crystal fiber also features good linear temperature sensing characteristics.Owing to its good stability,high linearity fit,simple manufacturing process,and other characteristics,it shows potential for application in marine environmental monitoring,the biopharmaceutical industry,food testing,and other fields.
作者
吴根柱
林春婷
卢俊城
马倩倩
WU Gen-zhu;LIN Chun-ting;LU Jun-cheng;MA Qian-qian(School of Physics and Electronic Information Engineering,Zhejiang Normal University,Jinhua 321004,China)
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2021年第5期951-957,共7页
Optics and Precision Engineering
基金
浙江省自然科学基金资助项目(No.LY19F050015,No.LY19F050014)。
关键词
光纤传感:七芯光子晶体
温度传感
马赫-曾德尔干涉
optical fiber sensing
seven-core photonic crystal
temperature sensor
Mach-Zehnder interference
