摘要
通过在光子晶体光纤(PCF)包层外侧填镀金纳米膜及PDMS温敏薄膜,设计了一种基于表面等离子体共振(SPR)效应的高灵敏度温度传感器,具有结构简单、工艺成熟、可逆性好的优点。PDMS的有效折射率会随温度的增加而减小,从而引起纤芯模式的损耗峰向短波方向移动。在完全匹配层边界条件下,利用全矢量有限元法分析SPR-PCF的损耗谱特性,实现了温度的高灵敏度精确快速测量。在22~47℃的温度范围内,所提传感器的温度灵敏度可达到-8.18 nm/℃,这种传感测量方法能拓展应用于各类安全检测和智能监测领域。
In this study,a high-sensitivity temperature sensor based on surface plasmon resonance(SPR)is designed by plating gold thin layer and PDMS temperature-sensitive film onto the outer layer of photonic crystal fiber(PCF).It has the advantages of a simple structure,mature process,and good reversibility.The refractive index of PDMS decreases with the increase in temperature,causing the loss peak of the core mode to move toward the short-wave direction.The full-vector finite element method is used to analyze the SPR-PCF loss spectral characteristics under the condition of a perfectly matched layer boundary,which can achieve highly sensitive and accurate temperature measurements.The temperature sensitivity of the proposed sensor has been observed to reach-8.18 nm/℃within the temperature range of 22--47℃.Furthermore,the proposed measurement method is applicable in safety detection and intelligent monitoring fields.
作者
刘海
白冰冰
张砚曾
陈聪
邵齐元
王浩然
Liu Hai;Bai Bingbing;Zhang Yanzeng;Chen Cong;Shao Qiyuan;Wang Haoran(School of Information and Control Engineering,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)
出处
《中国激光》
EI
CAS
CSCD
北大核心
2020年第4期202-208,共7页
Chinese Journal of Lasers
基金
国家重点研发计划(2017YFF0205500)
国家自然科学基金(51874301)。
关键词
测量
光子晶体光纤
表面等离子体共振
温度传感
光纤传感
measurement
photonic crystal fiber
surface plasmon resonance
temperature sensing
fiber sensing
