基于环形谐振器的新型可调控多通道滤波器

发布时间：2018-04-20 04:20

本文选题：环形谐振器 + 多通道滤波器　；参考：《哈尔滨工业大学》2017年硕士论文

【摘要】：近年来随着人们对于通讯速度无止境的追求,能够高速传输的光纤通讯系统得到了人们越来越多的重视。其中的波分复用系统是最核心的技术,而在此之中环形谐振器以其结构灵活可变,尺寸紧凑,易于调控等优势成为了人们的新宠。环形谐振器中的加减滤波器作为多通道波分复用器的基本结构,通过对其串联,平行耦合等方式可以实现多通道滤波。而与之伴随的是结构的复杂以及控制难度的加大。对于此本文提出了一种新型结构在一定程度上解决这个问题,首先,回顾了环形谐振器在近些年的发展以及结构的变化,重点分析了加减滤波器的进展以及在多通道滤波方面的运用。对于目前的国内外研究现状进行分析总结并提出问题所在。其次,从单环全通谐振器开始简单介绍了环形谐振器的基本理论,并利用数学方法分析了形成的谱线。分析了加减滤波器的基本结构,计算方法以及谱线特征,分析了其相移的变化和谐振点的高相位灵敏度和高色散的特性。接着,提出了一种新型的加减滤波器干涉仪的结构,通过对于光路的分析提出了其等效结构,介绍了一种对于加减滤波器类结构的计算方法,利用MATLAB对于结构输出谱线进行了仿真模拟,分析了其两种输出线型的原因以及调控方法,发现了一种特殊现象并利用实验对于模拟结果进行了验证。最后,设计了双通道滤波器的结构,给出了计算方法以及输出方程,通过模拟仿真的方法得到了双通道输出的结果。通过调控透射系数,衰减因子和相位差可以调节通道的带宽,消光比以及开关。通过实验验证了双通道的模拟结果并调节相位差得到了通道可重构的效果。通过级联加减滤波器干涉仪的方式对于双通道的通道数目进行了扩展,得到了四通道的类似梳状滤波器的滤波效果,并且通过调节相位实现了四通道的开关转换。
[Abstract]:In recent years, with the endless pursuit of communication speed, the optical fiber communication system which can transmit at high speed has been paid more and more attention. The wavelength Division Multiplexing (WDM) system is the most important technology, among which the ring resonator has become a new favorite because of its flexible structure, compact size, easy to control and so on. As the basic structure of multichannel wavelength division multiplexer, the addition and subtraction filter in ring resonator can realize multi-channel filter by means of series and parallel coupling. It is accompanied by the complexity of the structure and the increase of the difficulty of control. In this paper, a new type of structure is proposed to solve this problem to a certain extent. Firstly, the development of ring resonator in recent years and the structural changes are reviewed. The progress of addition and subtraction filter and its application in multi-channel filter are analyzed. The current domestic and foreign research status is analyzed and summarized and put forward the problem. Secondly, the basic theory of the ring resonator is introduced simply from the single ring all-pass resonator, and the spectral lines formed are analyzed by mathematical method. The basic structure, calculation method and spectral line characteristics of the additive and subtractive filter are analyzed. The change of phase shift and the characteristics of high phase sensitivity and high dispersion of resonance point are analyzed. Then, the structure of a new type of add-and-subtraction filter interferometer is proposed, and its equivalent structure is proposed by analyzing the optical path. A calculation method for the structure of additive and subtractive filter is introduced. MATLAB is used to simulate the output spectral lines of the structure. The causes of the two output lines and the control methods are analyzed. A special phenomenon is found and the simulation results are verified by experiments. Finally, the structure of the dual-channel filter is designed, the calculation method and the output equation are given, and the results of the two-channel output are obtained by simulation. The bandwidth, extinction ratio and switch of the channel can be adjusted by adjusting the transmission coefficient, attenuation factor and phase difference. The simulation results of the two channels are verified by experiments and the effect of channel reconfiguration is obtained by adjusting the phase difference. The number of two-channel channels is expanded by cascaded add-subtraction filter interferometer, and the filtering effect of four-channel comb-like filter is obtained, and the four-channel switching is realized by adjusting the phase.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN713

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