高Q值微环谐振器中产生克尔光频梳的理论研究

发布时间：2018-02-04 20:14

本文关键词： 非线性效应克尔光频梳 LLE模型噪声特性传输特性　出处：《电子科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：光频梳技术的出现,给光频率测量,通信应用等带来巨大的应用前景,而微环谐振器产生的克尔光频梳,具有频谱宽,功耗小,频率稳定性高,以及体积小易集成等优势,成为近年来的研究热点。虽然实验上已经证实了基于微环谐振器可产生宽频谱稳定的克尔光频梳,但是对克尔光梳产生机制的分析理解仍然不成熟,相关理论研究也相对较少,从而阻碍了克尔光梳的进一步实现及其应用。本文基于高Q值微环谐振器,对克尔光梳的相关机制、原理,特性以及相关应用进行了深入的理论研究,主要工作内容和创新如下:1、利用LLE方程建立了克尔光梳的产生模型,涉及的物理效应包括微环内损耗、失谐、色散等,利用仿真形成了克尔光频梳产生的四个不同阶段模型,分析解释了每一阶段的主要机制,主要包括四波混频和不稳定性调制等。仿真结果分析表明,克尔光梳产生是多种非线性效应共同参与的结果,与泵浦光功率,调谐值等密切相关。仿真结果与近期报道的相关实验结果一致。2、对克尔光梳的相干特性进行了深入研究。探究了不同情况下噪声种子对光梳相干产生的影响,包括初始状态随机注入噪声种子,以及光梳产生过程中人为注入噪声种子,对光梳产生的影响。通过分析光梳的频率相干性和时间相干性,得出噪声种子对光梳演化过程的影响。分析结果表明,由于克尔光梳的产生是由随机噪声触发的,且其演化过程中包含多种复杂的非线性效应,因此不同光梳之间普遍具有较低的相干性。3、由于克尔光梳具有频谱宽、线宽窄、稳定性高等优势,本文研究了将克尔光梳作为调制光源在通信传输系统中的传输特性。首先分析了其作为幅度调制传输系统的调制光源时的接收性能,包括眼图特征和最大Q值分布情况,从理论上证明了其作为非相干调制光源的可行性。其次分析了在光OFDM传输系统中,将克尔光梳作为相干调制光源时的传输及接收特性,结果表明,克尔光梳同样具有良好的调制特性。
[Abstract]:The emergence of optical frequency comb technology brings great application prospects for optical frequency measurement and communication applications, while the Kerr optical comb produced by micro-ring resonator has the advantages of wide spectrum, low power consumption and high frequency stability. The advantages of small size and easy integration have become a research hotspot in recent years. Although it has been proved experimentally based on microloop resonator can produce wide spectrum stable Kerr optical comb. However, the analysis and understanding of Kerr comb generation mechanism is still immature, and the related theoretical research is relatively few, which hinders the further realization and application of Kerr comb. This paper based on high Q value micro-ring resonator. The related mechanism, principle, characteristics and related applications of Kerr comb are studied in detail. The main work and innovation are as follows: 1. The generation model of Kerr comb is established by using LLE equation. The physical effects involved include loss, detuning, dispersion and so on. Four different models of Kerr optical comb are formed by simulation, and the main mechanism of each stage is analyzed and explained. The simulation results show that the Kerr comb generation is the result of a variety of nonlinear effects, and pump power. The simulation results are consistent with the experimental results reported recently. 2. The coherence characteristics of Kerr comb are studied in depth, and the effects of noise seeds on coherent generation of comb under different conditions, including initial state random injection of noise seeds, are investigated. By analyzing the frequency coherence and time coherence of light comb, the influence of noise seed on the evolution process of light comb is obtained. Because the generation of Kerr comb is triggered by random noise and there are many complex nonlinear effects in the evolution process, there is generally low coherence between different comb. The Kerr comb has the advantages of wide spectrum, narrow line width and high stability. In this paper, the transmission characteristics of Kerr comb as modulation light source in communication transmission system are studied. Firstly, the receiving performance of Kerr comb as modulation light source of amplitude modulation transmission system is analyzed. Including the characteristics of the eye map and the distribution of the maximum Q value, the feasibility of using it as a non-coherent modulation light source is proved theoretically. Secondly, the optical OFDM transmission system is analyzed. The transmission and reception characteristics of Kerr comb as coherent modulation light source show that the Kerr comb also has good modulation characteristics.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN629.1

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