平坦色散高双折射光子晶体光纤特性研究
发布时间：2018-08-14 13:02
【摘要】：光纤通信已成为现代通信的主要支柱，在现代通信网络中有着举足轻重的地位，而光纤则是其最主要的传输媒介。光子晶体光纤，作为一种新颖的微结构光纤，由于有着许多奇异的特性，比如说：无截止单模特性、高双折射率、低限制损耗、平坦色散等，而这些特性都超越了普通光纤，因此自1996年问世以来就受到世界各地科研人员的广泛关注。所以研究光子晶体光纤的性能参数及其传输特性就显得十分重要。本文着重于新颖光子晶体光纤的结构设计与特性研究，主要的工作内容如下： （1）分析了光子晶体光纤各种新颖的特性，同时还详细介绍了最常用的拉制光子晶体光纤的方法-堆积法及其工艺流程。 （2）本论文采用了全矢量有限元法和平面波展开法，以及各向异性完美匹配边界条件等算法来研究光子晶体光纤的传输特性，为后面的晶体光纤结构设计提供了理论思想和数学依据。 （3）根据光子晶体光纤特性的变化规律设计了一种新型正方形纤芯混合包层光子晶体光纤，分析了它的结构参数对光纤的色散、限制损耗等特性的影响，并由此取得了最优化参数值。这种光纤在1.32μm到1.64μm（320nm波段范围内）有着超平坦色散，，且限制损耗低于10-7dB/m，与此同时，该光纤的结构参数在制作过程中发生微小变化时，光纤的色散和限制损耗等特性不会发生突变。 （4）设计了一种有着良好的单模传输特性、高双折射率的光子晶体光纤。将传统光纤中平行于x轴的圆形空气孔换成椭圆形且空气孔中填充二氧化硅，并向左旋转角度45°，而在平行于y轴的空气孔中，将圆形空气孔换成椭圆形空气孔并向另一方向旋转45°，但不填充任何物质，里面只是填充空气，这种结构可以极大提高双折射率，并打破了光子晶体光纤的对称结构。研究结果表明所设计的光纤在1.55μm处双折射率高达4.65×10-2，且单模传输的截止波长只有0.6122μm，同时在1.55μm波长处有着6.4×10-6dB/m的较低限制损耗。
[Abstract]:Optical fiber communication has become the main pillar of modern communication and plays an important role in modern communication network, and optical fiber is the most important transmission medium. Photonic crystal fiber (PCF), as a novel microstructured fiber, has many unique properties, such as uncut single mode, high birefringence, low limiting loss, flat dispersion and so on. Since its inception in 1996, researchers all over the world have paid close attention to it. Therefore, it is very important to study the performance parameters and transmission characteristics of photonic crystal fiber. This paper focuses on the structure design and characteristics of novel photonic crystal fiber. The main work is as follows: (1) the novel properties of photonic crystal fiber are analyzed. At the same time, the most commonly used method of drawing photonic crystal fiber, the stacking method and its technological process, are introduced in detail. (2) the full vector finite element method and plane wave expansion method are used in this thesis. And the anisotropic perfectly matched boundary conditions are used to study the propagation characteristics of photonic crystal fibers. It provides a theoretical and mathematical basis for the structure design of the crystal fiber. (3) according to the characteristics of photonic crystal fiber, a new type of square-core hybrid cladding photonic crystal fiber is designed. The influence of the structure parameters on the dispersion and limiting loss of the fiber is analyzed, and the optimum parameters are obtained. The fiber has ultra-flat dispersion from 1.32 渭 m to 1.64 渭 m (in the 320nm band), and the limiting loss is less than 10-7 dB / m. At the same time, the structural parameters of the fiber vary slightly during the fabrication process. The dispersion and limiting loss of the fiber will not change. (4) A high birefringence photonic crystal fiber with good single-mode transmission characteristics is designed. The circular air holes parallel to the x axis in conventional optical fibers are replaced with elliptical and air holes filled with silicon dioxide and rotated at an angle of 45 掳to the left, while in air holes parallel to the y axis, The circular air hole is replaced by an elliptical air hole and rotates 45 掳in the other direction, but it is filled with no matter. This structure can greatly improve the birefringence and break the symmetry structure of photonic crystal fiber. The results show that the designed fiber has a birefringence of 4.65 脳 10 ~ (-2) at 1.55 渭 m, a cut-off wavelength of only 0.6122 渭 m and a low limiting loss of 6.4 脳 10-6dB/m at 1.55 渭 m.
【学位授予单位】：华东交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN253
本文编号：2182936
[Abstract]:Optical fiber communication has become the main pillar of modern communication and plays an important role in modern communication network, and optical fiber is the most important transmission medium. Photonic crystal fiber (PCF), as a novel microstructured fiber, has many unique properties, such as uncut single mode, high birefringence, low limiting loss, flat dispersion and so on. Since its inception in 1996, researchers all over the world have paid close attention to it. Therefore, it is very important to study the performance parameters and transmission characteristics of photonic crystal fiber. This paper focuses on the structure design and characteristics of novel photonic crystal fiber. The main work is as follows: (1) the novel properties of photonic crystal fiber are analyzed. At the same time, the most commonly used method of drawing photonic crystal fiber, the stacking method and its technological process, are introduced in detail. (2) the full vector finite element method and plane wave expansion method are used in this thesis. And the anisotropic perfectly matched boundary conditions are used to study the propagation characteristics of photonic crystal fibers. It provides a theoretical and mathematical basis for the structure design of the crystal fiber. (3) according to the characteristics of photonic crystal fiber, a new type of square-core hybrid cladding photonic crystal fiber is designed. The influence of the structure parameters on the dispersion and limiting loss of the fiber is analyzed, and the optimum parameters are obtained. The fiber has ultra-flat dispersion from 1.32 渭 m to 1.64 渭 m (in the 320nm band), and the limiting loss is less than 10-7 dB / m. At the same time, the structural parameters of the fiber vary slightly during the fabrication process. The dispersion and limiting loss of the fiber will not change. (4) A high birefringence photonic crystal fiber with good single-mode transmission characteristics is designed. The circular air holes parallel to the x axis in conventional optical fibers are replaced with elliptical and air holes filled with silicon dioxide and rotated at an angle of 45 掳to the left, while in air holes parallel to the y axis, The circular air hole is replaced by an elliptical air hole and rotates 45 掳in the other direction, but it is filled with no matter. This structure can greatly improve the birefringence and break the symmetry structure of photonic crystal fiber. The results show that the designed fiber has a birefringence of 4.65 脳 10 ~ (-2) at 1.55 渭 m, a cut-off wavelength of only 0.6122 渭 m and a low limiting loss of 6.4 脳 10-6dB/m at 1.55 渭 m.
【学位授予单位】：华东交通大学
【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 史青;光子晶体光纤及其在传感领域的应用研究[D];南开大学;2010年
本文编号：2182936
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