十字架纤芯thz偏振分束器.rar
十字架纤芯thz偏振分束器,十字架纤芯thz偏振分束器cross-core thz polarization splitter19000字41页目录中文摘要6abstract71 绪论81.1 课题的研究背景及意义81.2 thz-pcf的概述91.3 偏振分束器的概述101.4 论文的主要工作162 理论研究方法182.1comsol mult...
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十字架纤芯THz偏振分束器
Cross-core THz polarization splitter
19000字 41页
目录
中文摘要 6
ABSTRACT 7
1 绪论 8
1.1 课题的研究背景及意义 8
1.2 THz-PCF的概述 9
1.3 偏振分束器的概述 10
1.4 论文的主要工作 16
2 理论研究方法 18
2.1 COMSOL Multiphysics软件及有限元法简介 18
2.2 Rsoft和光束传播法简介 22
2.3 本章小结 24
3 十字架纤芯THz偏振分束器特性分析及设计思路 25
3.1 十字架纤芯THz偏振分束器的简介 25
3.1 .1 双芯光纤的工作原理 25
3.1.2 十字架纤芯THz偏振分束器的性能指标 26
3.2 十字架纤芯THz偏振分束器的设计思路 27
3.3 十字架纤芯THz偏振分束器的基本特性分析 28
3.3.1 十字架纤芯THz偏振分束器的结构 29
3.3.2传输特性分析 32
3.4 本章小结 37
总结与展望 38
致谢 39
参考文献 40
摘要： 在光通信领域中，偏振分束器是构建全光网络的一个重要器件。传统偏振分束器的长度较长、分光比较低，也不利于制备。近些年来，太赫兹光子晶体光纤（THz-PCF）以其单模截止特性、零色散点可调等优异特性引起人们的高度重视。本文基于THz-PCF的优异特性，研究十字架纤芯THz光纤偏振分束器。文章使用矢量有限元方法设计偏振分束器的结构，用全矢量光束传播法分析其分束特性。
本论文设计的十字架纤芯THz偏振分束器，在光纤横截面引入交叉介质层，由于其基模模场能量主要分布在纤芯周围的空气孔中，从而实现了低的传输损耗。当工作波长为300μm时，数值计算结果表明该偏振分束器的分束长度为12.16cm。在292—307μm波长范围内，偏振分束器的消光比绝对值可高于15dB，且在300μm处，两偏振模的器件传输损耗不超过0.3dB。
本论文提出的新型十字架纤芯THz光纤偏振分束器结构简单，性能优良，为THz光纤偏振分束器的设计提供了新的思路，在未来的相关应用中将具有重要意义。
关键词：偏振分束器 太赫兹 光子晶体光纤 超模
Cross-core THz polarization splitter
ABSTRACT： In the field of optical communications, polarizing beam splitter is an all-optical network is an important device. Traditional polarizing beam splitter longer length spectroscopic relatively low, is not conducive to the preparation. In recent years, terahertz photonic crystal fiber (THz-PCF) with its single-mode cutoff characteristics, zero dispersion point adjustable and other outstanding features attracted people's attention. Based on the excellent properties of the THz-PCF studied cross THz core fiber polarization beam splitter. Article vector finite element method using a polarization beam splitter design structure, with full vector beam propagation method to analyze the beam characteristics.
In this thesis, the core cross THz polarization beam splitter, the dielectric layer is introduced in the fiber cross cross-section due to its fundamental mode field distribution of energy in the main air holes around the core in order to achieve a low transmission loss. When the wavelength is 300μm, the calculation results show that the polarization beam splitting unit length of 12.16cm. In the wavelength range of 292-307μm, the polarization beam splitter may be greater than the absolute value of the extinction ratio of 15dB, and the place at 300μm, the transmission loss of the device is not more than two polarization mode 0.3dB.
This paper presents new cross core of THz fiber polarization beam splitter simple structure, excellent performance, as THz fiber polarization beam splitter is designed to provide new ideas, has important significance in the relevant application in the future.
KEYWORD：Polarization splitter;Terahertz;Photonic crystal fiber (PCF);Super mode
Cross-core THz polarization splitter
19000字 41页
目录
中文摘要 6
ABSTRACT 7
1 绪论 8
1.1 课题的研究背景及意义 8
1.2 THz-PCF的概述 9
1.3 偏振分束器的概述 10
1.4 论文的主要工作 16
2 理论研究方法 18
2.1 COMSOL Multiphysics软件及有限元法简介 18
2.2 Rsoft和光束传播法简介 22
2.3 本章小结 24
3 十字架纤芯THz偏振分束器特性分析及设计思路 25
3.1 十字架纤芯THz偏振分束器的简介 25
3.1 .1 双芯光纤的工作原理 25
3.1.2 十字架纤芯THz偏振分束器的性能指标 26
3.2 十字架纤芯THz偏振分束器的设计思路 27
3.3 十字架纤芯THz偏振分束器的基本特性分析 28
3.3.1 十字架纤芯THz偏振分束器的结构 29
3.3.2传输特性分析 32
3.4 本章小结 37
总结与展望 38
致谢 39
参考文献 40
摘要： 在光通信领域中，偏振分束器是构建全光网络的一个重要器件。传统偏振分束器的长度较长、分光比较低，也不利于制备。近些年来，太赫兹光子晶体光纤（THz-PCF）以其单模截止特性、零色散点可调等优异特性引起人们的高度重视。本文基于THz-PCF的优异特性，研究十字架纤芯THz光纤偏振分束器。文章使用矢量有限元方法设计偏振分束器的结构，用全矢量光束传播法分析其分束特性。
本论文设计的十字架纤芯THz偏振分束器，在光纤横截面引入交叉介质层，由于其基模模场能量主要分布在纤芯周围的空气孔中，从而实现了低的传输损耗。当工作波长为300μm时，数值计算结果表明该偏振分束器的分束长度为12.16cm。在292—307μm波长范围内，偏振分束器的消光比绝对值可高于15dB，且在300μm处，两偏振模的器件传输损耗不超过0.3dB。
本论文提出的新型十字架纤芯THz光纤偏振分束器结构简单，性能优良，为THz光纤偏振分束器的设计提供了新的思路，在未来的相关应用中将具有重要意义。
关键词：偏振分束器 太赫兹 光子晶体光纤 超模
Cross-core THz polarization splitter
ABSTRACT： In the field of optical communications, polarizing beam splitter is an all-optical network is an important device. Traditional polarizing beam splitter longer length spectroscopic relatively low, is not conducive to the preparation. In recent years, terahertz photonic crystal fiber (THz-PCF) with its single-mode cutoff characteristics, zero dispersion point adjustable and other outstanding features attracted people's attention. Based on the excellent properties of the THz-PCF studied cross THz core fiber polarization beam splitter. Article vector finite element method using a polarization beam splitter design structure, with full vector beam propagation method to analyze the beam characteristics.
In this thesis, the core cross THz polarization beam splitter, the dielectric layer is introduced in the fiber cross cross-section due to its fundamental mode field distribution of energy in the main air holes around the core in order to achieve a low transmission loss. When the wavelength is 300μm, the calculation results show that the polarization beam splitting unit length of 12.16cm. In the wavelength range of 292-307μm, the polarization beam splitter may be greater than the absolute value of the extinction ratio of 15dB, and the place at 300μm, the transmission loss of the device is not more than two polarization mode 0.3dB.
This paper presents new cross core of THz fiber polarization beam splitter simple structure, excellent performance, as THz fiber polarization beam splitter is designed to provide new ideas, has important significance in the relevant application in the future.
KEYWORD：Polarization splitter;Terahertz;Photonic crystal fiber (PCF);Super mode
