基于光子学技术的相位可调谐倍频微波信号发生器的研究

发布时间：2018-02-03 22:30

本文关键词： 微波光子学光生微波信号移相器马赫泽德调制器　出处：《华中科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着光电技术的迅速发展，微波技术和光子技术的相互转换和融合日趋紧密。光域生成高频的微波信号源，凭借着其高稳定性，低成本、结构简单、抗电磁干扰能力强等优势，已经成为微波光子学领域研究的热点。与此同时，基于光子学技术实现微波相移器的研究也在如火如荼的进行中。同时实现频率和相位均可灵活调谐的高频微波信号，是光载射频通信中的核心技术之一，在光纤通信系统正在朝着超高速率、超大容量以及超长距离的方向发展的当今社会有着极大的实际应用价值。本论文聚焦于基于MZM（马赫泽德调制器）的边带调制技术，对光生微波四倍频信号进行了详尽的分析。同时结合核心器件可编程光滤波器，对相位360o可调谐的四倍频微波光子发生器做出了深入的研究。主要工作内容如下： (1)从理想对称MZM的物理结构出发，分析了其工作原理。对基于MZM的边带调制技术进行了详细的公式推导，在此基础上进一步对外调制法生成倍频微波信号技术给出了理论依据。 (2)研究并探讨了不对称MZM的物理结构对其边带调制效应的影响，对不对称MZM结构中的实际物理参数进行了研究和分析，通过仿真对比说明了物理参数的改变对MZM边带调制效果的影响。在仿真结果的基础上，对基于不对称MZM的边带调制的工作原理进行了公式的推导，，对仿真结果进行了理论上的验证。 (3)提出了一种光域上产生相位可调的四倍频微波信号的方案。对其中的核心器件可编程滤波器的物理本质和工作原理进行了详细的说明，并深入分析和讨论了符合本实验方案的可编程滤波器的关键参数的最优化设置。依据提出的实验方案，展开实实验，利用实验结果对实验方案的可行性进行了验证。分别对实验系统的微波信号移相性能和微波信号的倍频性能进行了详细的分析和评估。并提出本实验方案能够支持多波长并行工作模式，并进行了初步的实验，说明了其支持多波长操作的可行性。
[Abstract]:With the rapid development of optoelectronic technology, the conversion and fusion of microwave technology and photonic technology are becoming more and more close. The high-frequency microwave signal source is generated in the optical domain by virtue of its high stability, low cost and simple structure. The strong anti-electromagnetic interference ability has become a hot spot in the field of microwave photonics, and at the same time, it has become a hot spot in the field of microwave photonics. The research of microwave phase shifter based on photonics is in full swing. It is one of the core technologies of optical RF communication to realize high frequency microwave signal with flexible tuning of frequency and phase at the same time. The optical fiber communication system is moving towards ultra-high rate. The development of ultra-large capacity and ultra-long distance in today's society has great practical value. This paper focuses on the MZM (Mahzede Modulator) based sideband modulation technology. A detailed analysis of the photonic microwave quadruple frequency signal is carried out. At the same time, the programmable optical filter is combined with the core device. The phase 360o tunable fourth harmonic microwave photonic generator is studied. The main work is as follows: 1) based on the physical structure of ideal symmetric MZM, the working principle is analyzed, and the formula of sideband modulation based on MZM is deduced in detail. On this basis, the theoretical basis of generating frequency doubling microwave signal by external modulation method is given. The influence of the physical structure of asymmetric MZM on the sideband modulation effect is studied and the actual physical parameters in asymmetric MZM structure are studied and analyzed. The effect of the change of physical parameters on the effect of MZM sideband modulation is explained by simulation. On the basis of the simulation results, the working principle of the sideband modulation based on asymmetric MZM is deduced. The simulation results are verified theoretically. In this paper, a scheme of generating four-frequency microwave signal with adjustable phase in optical domain is presented. The physical essence and working principle of the core device programmable filter are described in detail. The optimization of the key parameters of the programmable filter in accordance with the experimental scheme is analyzed and discussed in depth. According to the proposed experimental scheme, the actual experiment is carried out. The feasibility of the experimental scheme is verified by the experimental results. The phase shift performance of the microwave signal and the frequency doubling performance of the microwave signal are analyzed and evaluated in detail. Multi-wavelength parallel mode. The feasibility of supporting multi-wavelength operation is demonstrated by a preliminary experiment.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM935

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