中国激光, 2020, 47 (4): 0404003, 网络出版: 2020-04-08
基于SPR效应的金-PDMS涂覆光子晶体光纤高灵敏度温度测量 下载: 1471次
High-Sensitivity Temperature Measurement Based on SPR in Gold-PDMS-Coated Photonic Crystal Fiber
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
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。
Abstract
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.
刘海, 白冰冰, 张砚曾, 陈聪, 邵齐元, 王浩然. 基于SPR效应的金-PDMS涂覆光子晶体光纤高灵敏度温度测量[J]. 中国激光, 2020, 47(4): 0404003. Liu Hai, Bai Bingbing, Zhang Yanzeng, Chen Cong, Shao Qiyuan, Wang Haoran. High-Sensitivity Temperature Measurement Based on SPR in Gold-PDMS-Coated Photonic Crystal Fiber[J]. Chinese Journal of Lasers, 2020, 47(4): 0404003.