基于保偏光子晶体光纤的温度传感器研究
发布时间：2019-04-27 15:09
【摘要】：温度传感器被广泛应用于农业、工业、物联网等诸多领域,光纤温度传感器具有电绝缘、耐高压、耐腐蚀的特点,保偏光子晶体光纤依靠其优良的高双折射特性成为光纤传感技术领域的研究热点,保偏光子晶体光纤是温度传感器的重要组成元件,其性能的好坏决定了温度传感器灵敏度的高低。本文提出了一种新型混合晶格结构的保偏光子晶体光纤,该光纤由矩形空气孔和圆形空气孔混合排列而成。首先使用基于有限元法的Comsol软件研究了该光纤的基模模场分布及双折射特性,并分析了不同结构参数变化对光纤模式双折射特性及拍长特性的影响。研究表明,随着工作波长的增大,光纤的双折射也增大,在0.4μm到2.0μm波段模式双折射保持在10-2量级。当空气孔间距Λ压缩至1μm,矩形空气孔面积A为1μm×0.1μm,圆形空气孔直径D增大到0.96μm时,工作波长λ为1550nm的光纤双折射可达到3.4849×10-2。在此基础上从温敏液体的选择、填充方式的确定及光纤结构参数的变化三个方面研究了此新型结构保偏光子晶体光纤的温敏特性,研究结果表明,使用乙醇液体填充纤芯区域圆形空气孔,一定结构参数下光子晶体光纤温度灵敏度达到10-5数量级。最后将该光纤用于Sagnac结构的保偏光子晶体光纤温度传感器设计,通过Matlab进行仿真分析,结果表明,使用1450nm—1650nm的宽谱光源入射时,基于此保偏光子晶体光纤的Sagnac光纤温度传感器的透射谱谐振峰随温度变化产生明显偏移,传感器灵敏度为2nm/℃,线性测量范围为-30℃~78℃。该温度传感器具有抗电磁干扰、小型化、灵敏度高、测量范围宽等优点,在工业检测和控制中有广泛的应用。
[Abstract]:Temperature sensor is widely used in agriculture, industry, Internet of things and many other fields. Optical fiber temperature sensor has the characteristics of electrical insulation, high voltage resistance and corrosion resistance. Polarization-maintaining photonic crystal fiber (PCF) is an important component of temperature sensor because of its excellent high birefringence in the field of optical fiber sensing technology, and the polarization-maintaining photonic crystal fiber (PCF) is an important component of the temperature sensor. The sensitivity of temperature sensor is determined by its performance. A novel polarization-maintaining photonic crystal fiber with mixed lattice structure is presented in this paper. The fiber is composed of rectangular air holes and circular air holes. Firstly, the basic mode field distribution and birefringence characteristics of the fiber are studied by using Comsol software based on the finite element method, and the effects of different structural parameters on the birefringence and beat length of the fiber are analyzed. The results show that the birefringence of the fiber increases with the increase of the operating wavelength, and the mode birefringence in the range from 0.4 渭 m to 2.0 渭 m remains in the order of 10 渭 2. When the air hole spacing is compressed to 1 渭 m, the rectangular air hole area A is 1 渭 m 脳 0.1 渭 m, and the diameter of circular air hole D is increased to 0.96 渭 m, the birefringence of the fiber with 位 1550nm can reach 3.4849 脳 10 ~ (- 2). On this basis, the temperature-sensitive characteristics of the novel polarization-maintaining photonic crystal fiber are studied from three aspects: the selection of thermosensitive liquid, the determination of filling mode and the change of fiber structural parameters. The results show that: When ethanol liquid is used to fill circular air holes in the core region, the temperature sensitivity of photonic crystal fiber can reach the order of 10 ~ (5) under certain structural parameters. Finally, the fiber is applied to the design of polarization-maintaining photonic crystal fiber temperature sensor in Sagnac structure, and the simulation analysis is carried out by Matlab. The results show that when the wide-spectrum light source of 1450nm-1650nm is used to incident, Based on the polarization-maintaining photonic crystal fiber, the resonant peak of transmission spectrum of Sagnac optical fiber temperature sensor is obviously shifted with the change of temperature. The sensitivity of the sensor is 2nm/ 鈩，
本文编号：2467079
[Abstract]:Temperature sensor is widely used in agriculture, industry, Internet of things and many other fields. Optical fiber temperature sensor has the characteristics of electrical insulation, high voltage resistance and corrosion resistance. Polarization-maintaining photonic crystal fiber (PCF) is an important component of temperature sensor because of its excellent high birefringence in the field of optical fiber sensing technology, and the polarization-maintaining photonic crystal fiber (PCF) is an important component of the temperature sensor. The sensitivity of temperature sensor is determined by its performance. A novel polarization-maintaining photonic crystal fiber with mixed lattice structure is presented in this paper. The fiber is composed of rectangular air holes and circular air holes. Firstly, the basic mode field distribution and birefringence characteristics of the fiber are studied by using Comsol software based on the finite element method, and the effects of different structural parameters on the birefringence and beat length of the fiber are analyzed. The results show that the birefringence of the fiber increases with the increase of the operating wavelength, and the mode birefringence in the range from 0.4 渭 m to 2.0 渭 m remains in the order of 10 渭 2. When the air hole spacing is compressed to 1 渭 m, the rectangular air hole area A is 1 渭 m 脳 0.1 渭 m, and the diameter of circular air hole D is increased to 0.96 渭 m, the birefringence of the fiber with 位 1550nm can reach 3.4849 脳 10 ~ (- 2). On this basis, the temperature-sensitive characteristics of the novel polarization-maintaining photonic crystal fiber are studied from three aspects: the selection of thermosensitive liquid, the determination of filling mode and the change of fiber structural parameters. The results show that: When ethanol liquid is used to fill circular air holes in the core region, the temperature sensitivity of photonic crystal fiber can reach the order of 10 ~ (5) under certain structural parameters. Finally, the fiber is applied to the design of polarization-maintaining photonic crystal fiber temperature sensor in Sagnac structure, and the simulation analysis is carried out by Matlab. The results show that when the wide-spectrum light source of 1450nm-1650nm is used to incident, Based on the polarization-maintaining photonic crystal fiber, the resonant peak of transmission spectrum of Sagnac optical fiber temperature sensor is obviously shifted with the change of temperature. The sensitivity of the sensor is 2nm/ 鈩，
本文编号：2467079
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