摘要
基于在折射率引导型光子晶体光纤(PCF)上写制长周期光栅(LPG),并填充折射率温度敏感型液体,提出了一种新型温度传感器。应用全矢量有限元法,计算了在六角形结构排列的大模场面积光子晶体光纤(LMA-PCF)的空气孔中填充液体乙醇前后,PCF的纤芯基模和包层模的模场分布和色散曲线。根据耦合模理论,分析了光子晶体光纤长周期光栅(PCF-LPG)的传输谱随温度变化的关系。研究表明,填充液体乙醇后,在-20℃~80℃范围内PCF-LPG传输谱中心波长随温度近似以线性变化,其温度敏感度为1.766nm/℃。
Based on a long-period grating (LPG) formed in a index guiding photonic crystal fiber (PCF) that is filled with a liquid of temperature-sensitive refractive index, a novel temperature sensor is proposed. Using a full-vector finite element method, the modal profiles and the dispersion curves of the core mode and the cladding mode of a large mode area photonic crystal fiber (LMA-PCF) are calculated with their hexagonally arrayed air-holes filled and unfilled with liquid ethanol, respectively. By means of the coupled-mode theory, the temperature dependence of the transmission spectrum of the PCF-LPG is studied. The result shows that in the temperature range from --20 ℃ to 80℃ the PCF-LPG resonance wavelength varies almost linearly with the temperature when the PCF is filled with liquid ethanol and the temperature sensitivitv is 1. 766 nm/℃.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2011年第12期133-137,共5页
Chinese Journal of Lasers
基金
国家973计划(2010CB327801)资助课题
关键词
光纤光学
温度传感器
长周期光栅
光子晶体光纤
耦合模理论
fiber optics
temperature sensor
long-period grating
photonic crystal fiber
coupled-mode theory
作者简介
宋晓利(1988-),女,硕士研究生,主要从事光纤光栅、光子晶体光纤等方面的研究。E—mail:xyzxiaoli@163.com
导师简介:白育堃(1970-),男,博士,副教授,主要从事光通信及传感等方面的研究。E—mail:tjutbai-1@163.com(通信联系人)