基于微纳光纤的磁场可调谐器件的理论与实验研究
发布时间：2018-10-31 13:39
【摘要】：随着信息科学技术的快速发展,对大容量数据、高速率信息的传输及处理要求越来越高,微型化、集成化、高性能、低功耗的新型光纤光子器件研究成为光电子领域中的重要研究课题。微纳光纤由于其特殊的几何结构,具有大的体表比,更大的波导色散特性、更高的非线性效应、更低的光学损耗特性、更强的光场约束能力,强的倏逝场效应的特性,在很多领域中被大家广泛研究。目前可以通过多种技术获得微纳光纤结构,使其拥有独特的传输性能和多样的波导结构。微纳光纤易于与功能纳米材料集成,为设计可调谐光电子器件提供了必要条件。磁场探测在军事、航空航天、生物医学和机械检测等领域变得越来越重要。基于磁流体和微纳光纤结构的光纤磁场可调谐器件在传感和通信领域的应用表现出巨大的潜力。本文通过两种方法及相关不同传导特性的光纤设计了微光纤,分析了其中的光传播特点,并进行了基于微纳光纤和磁流体结合的光纤磁场可调谐器件的理论与实验方面的研究。包括介绍了微纳光纤的制造工艺,数值模拟和相应磁场实验,实现了利用不同结构的微纳光纤和磁流体的光纤磁场调谐器件。本文的研究工作主要包括:1.介绍了一种基于包层直径减少的细芯微光纤磁场调谐器件。通过氢氟酸对细芯光纤进行腐蚀,改变其中传输的模场分布,获得了灵敏度高的强度解调的光纤探测器件,理论分析了其中透射变化的原因。2.提出了一种利用磁流体和拉锥方形微光纤的磁场调谐器件。采用拉锥的方式能够有效增加其倏逝场效应,研究了方形光纤中模式的传输特性,并对方形光纤中传输的模式进行了理论模拟,确定出参与干涉的模式阶数。将方形微光纤和磁流体结合的方法,通过外界磁场实现了对干涉峰的波长调谐。3.提出基于S形状微光纤和磁流体结合实现的磁场传感器件。利用电弧放电对单模光纤进行了轴向结构的改变,使单模光纤的轴向不对称,实现了对包层模式的激发,并且该传输的包层模式和纤芯模式耦合,形成了模式干涉。具体分析了外界磁场变化下,对应的干涉峰的波长和振幅的变化。4.通过火焰拉锥单模光纤实现了模式的激发,并通过熔接机错位熔接,实现了基于包层模式干涉的光纤模式干涉仪,分析了在垂直磁场下和平行磁场下的透射谱图响应,该器件可以实现双方向的磁场测量。
[Abstract]:With the rapid development of information science and technology, the transmission and processing of large capacity data and high speed information require more and more high performance, miniaturization, integration, and high performance. The research of low-power optical fiber photonic devices has become an important research topic in the field of optoelectronics. Because of its special geometric structure, micro-nano fiber has the characteristics of large surface ratio, larger waveguide dispersion, higher nonlinear effect, lower optical loss, stronger light field confinement and stronger evanescent field effect. It has been widely studied in many fields. At present, micro and nano fiber structures can be obtained by a variety of techniques, which make them have unique transmission performance and various waveguide structures. Micro-nano fiber is easy to integrate with functional nanomaterials, which provides the necessary conditions for the design of tunable optoelectronic devices. Magnetic field detection is becoming more and more important in military, aerospace, biomedical and mechanical fields. The applications of fiber magnetic tunable devices based on magnetohydrodynamic and micro-nano fiber structures in sensing and communication fields have shown great potential. In this paper, the optical fiber is designed by two methods and the optical fiber with different conduction characteristics. The characteristics of optical propagation are analyzed, and the theoretical and experimental study of the tunable optical fiber magnetic field device based on the combination of micro-nano fiber and magnetic fluid is carried out. The fabrication process, numerical simulation and magnetic field experiment of micro-nano fiber are introduced, and the optical fiber magnetic tuner with different structure and magnetic fluid is realized. The research work of this paper mainly includes: 1. A thin core microfiber magnetic tuner based on the reduction of cladding diameter is introduced. The fine core fiber was corroded by hydrofluoric acid, and the mode field distribution was changed, and the high sensitivity demodulated optical fiber detector was obtained. The reason of the transmission change was analyzed theoretically. 2. A magnetic field tuner using magnetic fluid and tapered square microfiber is proposed. The evanescent field effect can be effectively increased by tapering. The transmission characteristics of the mode in square fiber are studied. The theoretical simulation of the transmission mode in square fiber is carried out, and the number of modes participating in the interference is determined. By combining square microfiber with magnetic fluid, the wavelength tuning of interference peak is realized by external magnetic field. 3. 3. A magnetic field sensor based on S shape microfiber and magnetic fluid is proposed. The axial structure of single-mode fiber is changed by arc discharge, which makes the axial asymmetry of single-mode fiber and excites the cladding mode, and the cladding mode and core mode of the transmission are coupled to form the mode interference. The variation of the wavelength and amplitude of the corresponding interference peak under the change of external magnetic field is analyzed in detail. 4. The mode excitation is realized by flame tapered single-mode fiber, and the optical fiber mode interferometer based on cladding mode interference is realized by welding machine dislocation. The response of transmission spectrum in vertical magnetic field and parallel magnetic field is analyzed. The device can measure the magnetic field in both directions.
【学位授予单位】：天津理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN253
本文编号：2302397
[Abstract]:With the rapid development of information science and technology, the transmission and processing of large capacity data and high speed information require more and more high performance, miniaturization, integration, and high performance. The research of low-power optical fiber photonic devices has become an important research topic in the field of optoelectronics. Because of its special geometric structure, micro-nano fiber has the characteristics of large surface ratio, larger waveguide dispersion, higher nonlinear effect, lower optical loss, stronger light field confinement and stronger evanescent field effect. It has been widely studied in many fields. At present, micro and nano fiber structures can be obtained by a variety of techniques, which make them have unique transmission performance and various waveguide structures. Micro-nano fiber is easy to integrate with functional nanomaterials, which provides the necessary conditions for the design of tunable optoelectronic devices. Magnetic field detection is becoming more and more important in military, aerospace, biomedical and mechanical fields. The applications of fiber magnetic tunable devices based on magnetohydrodynamic and micro-nano fiber structures in sensing and communication fields have shown great potential. In this paper, the optical fiber is designed by two methods and the optical fiber with different conduction characteristics. The characteristics of optical propagation are analyzed, and the theoretical and experimental study of the tunable optical fiber magnetic field device based on the combination of micro-nano fiber and magnetic fluid is carried out. The fabrication process, numerical simulation and magnetic field experiment of micro-nano fiber are introduced, and the optical fiber magnetic tuner with different structure and magnetic fluid is realized. The research work of this paper mainly includes: 1. A thin core microfiber magnetic tuner based on the reduction of cladding diameter is introduced. The fine core fiber was corroded by hydrofluoric acid, and the mode field distribution was changed, and the high sensitivity demodulated optical fiber detector was obtained. The reason of the transmission change was analyzed theoretically. 2. A magnetic field tuner using magnetic fluid and tapered square microfiber is proposed. The evanescent field effect can be effectively increased by tapering. The transmission characteristics of the mode in square fiber are studied. The theoretical simulation of the transmission mode in square fiber is carried out, and the number of modes participating in the interference is determined. By combining square microfiber with magnetic fluid, the wavelength tuning of interference peak is realized by external magnetic field. 3. 3. A magnetic field sensor based on S shape microfiber and magnetic fluid is proposed. The axial structure of single-mode fiber is changed by arc discharge, which makes the axial asymmetry of single-mode fiber and excites the cladding mode, and the cladding mode and core mode of the transmission are coupled to form the mode interference. The variation of the wavelength and amplitude of the corresponding interference peak under the change of external magnetic field is analyzed in detail. 4. The mode excitation is realized by flame tapered single-mode fiber, and the optical fiber mode interferometer based on cladding mode interference is realized by welding machine dislocation. The response of transmission spectrum in vertical magnetic field and parallel magnetic field is analyzed. The device can measure the magnetic field in both directions.
【学位授予单位】：天津理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN253
【参考文献】
相关博士学位论文 前1条
1 李宇航;基于倏逝场特性的微纳光纤器件研究[D];浙江大学;2008年
相关硕士学位论文 前1条
1 郭宇;基于化学腐蚀方法制作的特种光纤珐—珀传感器[D];电子科技大学;2010年
，本文编号：2302397
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