微波信号光子学产生及处理的理论与实验研究

发布时间：2018-02-27 20:26

本文关键词： 微波光子学光生微波布里渊滤波器 Pound-Drever-Hall 折射率的温度相关性　出处：《电子科技大学》2016年博士论文　论文类型：学位论文

【摘要】：微波光子学(MWP)的研究价值在于,一方面,光子学以其固有特性产生的优势使微波系统具备了复杂的,或通常难以直接在微波域实现的功能(如快速调谐和可重构等);另一方面,为传统信息与通信系统和网络提供了新的解决方案。目前MWP正在微波信号的全光产生、滤波与变频、微波光子链路和光分组交换等领域取得科研和商用突破。研究微波信号光子学的产生和处理具有重要意义,本论文的主要研究内容可概括如下:1.分析了MWP的发展基础、基本原理、研究热点及意义;系统总结了微波信号的光子学产生和滤波处理两个研究方向的进展情况和发展趋势。2.对固态单向非平面环形振荡(SUNPRO)激光器的工作原理和设计过程进行了分析,包括:对谐振腔的结构及几何光路的分析、谐振腔的本征偏振态分析、激光器设计参数的确定及谐振腔稳定性分析;基于温度控制原理对该激光器的频率稳定性进行了研究,并对基于法布里-珀罗(FP)腔的激光频率稳定性进行了研究,包括对基于Pound-Drever-Hall(PDH)的激光器的频率稳定性和基于PDH激光器稳频的FP腔稳定性开展了研究;借助两个独立运作的SUNPRO激光器外差拍频,获得了30GHz调谐范围的微波信号源。3.分析了受激布里渊散射(SBS)的基本原理及其控制方程的数学表述,尤其对非弹性散射光的机理和SBS的声-光波耦合方程进行了分析;对窄带泵浦布里渊滤波器的相对等效色散参数进行了分析,开展了窄带泵浦布里渊滤波器的信号失真研究,仿真结果表明,布里渊滤波器的饱和效应限制了此类带通滤波器的线性性能,更宽的脉冲将获得更大的信号分贝增益和更小的展宽因子,因此,它们更适合于此类基于SBS的MWP窄带通滤波系统。4.通过增加泵浦光源的带宽可以提高布里渊滤波器的带宽,进而对宽带泵浦布里渊滤波器的基础理论进行了研究;根据宽带泵浦光的SBS增益谱可表示为输入泵浦光频谱与本征布里渊增益谱的卷积运算这一结论,对高斯宽带泵浦布里渊滤波器的频谱和失真特性进行了分析,并比较了高斯宽带泵浦与窄带泵浦布里渊滤波器之间的性能差异,研究结果表明二阶增益不均匀是导致窄带和高斯宽带泵浦布里渊滤波器失真的主要原因。5.在宽带布里渊滤波器的理论基础之上,进一步研究了矩形宽带泵浦条件下的布里渊滤波器的附加增益和相移特性,并详细讨论了二阶增益不均匀与三阶色散(TOD)对滤波器带来的失真影响,研究结果表明TOD是矩形宽带泵浦布里渊滤波器失真的主要原因;针对MWP数字通信链路应用场合,对RZ-OOK、NRZ-OOK和RZ-DPSK三种码型脉冲信号的滤波特性进行了分析和比较,对比上述三类码型数据分别经历矩形宽带泵浦和高斯宽带泵浦滤波系统后的信号眼图发现,矩形宽带泵浦的滤波系统不但对斯托克斯信号引入更少的延时,而且它对待滤波信号的失真更小,尤其是在对RZ-OOK和RZ-DPSK两类码型数据的滤波处理中,增益不均匀和TOD与眼图的显著恶化无关。6.研究了利用温度控制实现可调谐MWP布里渊滤波器的可行性,推导了布里渊频移与温度的关系表达式;对影响布里渊频移的光纤折射率的温度相关特性进行了详细的理论推导和实验验证,即理论证明了光纤的折射率与温度的线性相关性,且采用光纤延迟测量技术,对301~1275K宽温度范围内延迟引起的折射率变化进行了实验验证,实验数据和理论推导结论一致;在应变一定的情况下,理论推导了布里渊频移与温度的变化关系式,对于标准单模光纤,布里渊滤波器通带可随温度的变化率为1.32MHz/℃。
[Abstract]:Microwave Photonics (MWP) on the one hand, the value is generated with its inherent advantages of photonics microwave system has a complex, often difficult to directly or in the microwave domain functions (such as fast tuning and reconfiguration); on the other hand, the traditional information and communication systems and networks are provided to solve the new scheme. MWP is the current all-optical microwave signal generation and frequency domain filtering, microwave photonic links and optical packet switching has scientific and commercial breakthrough. It is important significance to study the microwave signal processing and photonics, the main research contents of this thesis can be summarized as follows: 1. analyze the development foundation, the basic principle of MWP and the research focus and significance; summarizes the microwave signal generation and processing two photonics research situation and development trend of progress of.2. on solid unidirectional non planar ring oscillator (SUNPR O) the working principle and design process of the laser are analyzed, including the analysis of the structure and the geometric optical path of the resonator, analysis of polarization eigenstate of the resonant cavity, determine the design parameters and analysis of laser resonator stability; temperature control principle is studied based on the frequency stability, and based on Fabri Perot (FP) laser frequency stability of cavity are studied, including Pound-Drever-Hall (PDH) based on the frequency stability of the laser cavity and FP stability PDH laser frequency stabilization based on research; with the help of two independent SUNPRO laser heterodyne beat, obtained the 30GHz tuning range of microwave signal source.3. analysis of stimulated Brillouin scattering (SBS) representation of the basic principle and control equation of mathematics, especially the mechanism and SBS on inelastic scattering of acoustic wave coupling equation is analyzed; the The relative equivalent dispersion parameters of narrowband pumped Brillouin filter are analyzed, the signal distortion of pump Brillouin narrowband filter, the simulation results show that the performance of linear saturation limits such Brillouin filter bandpass filter, wider pulse broadening factor, will gain greater signal dB gain and smaller so they more suitable for such narrowband MWP based on SBS filter system.4. by increasing the pumping source bandwidth can improve the Brillouin filter bandwidth, and then on the basis of broadband pump Brillouin filter theory is studied; according to broadband pump SBS gain spectrum for the conclusion of input pump light spectrum and intrinsic Brillouin gain spectrum the convolution spectrum of Gauss filter and broadband pump Brillouin distortion characteristics were analyzed, and compared with Gao Sikuan The performance difference between the pump and the narrowband pump Brillouin filter, the results show that two order non-uniform gain is the main cause of the distortion of the narrowband and broadband Gauss pump Brillouin filter.5. based on broadband Brillouin filter, the additional gain further research on Brillouin filter wideband rectangular pumping conditions and phase shift characteristics, and two in order to gain uniformity and three order dispersion (TOD) is discussed in detail for distortion caused by the filter effects, the results show that the TOD is the main reason for the distortion of rectangular broadband pump Brillouin filter; digital communication link for MWP applications on RZ-OOK, NRZ-OOK and RZ-DPSK three kinds of code pulse signal filtering characteristics are analyzed and compared. In contrast to the above three kinds of pattern data respectively through rectangular signal eyespattern broadband pump and Gauss broadband pump filter system after the, Rectangular filter system broadband pump not only the introduction of less of Stokes signal delay, distortion is smaller and it treated the filtered signal, especially in the filtering of RZ-OOK and RZ-DPSK two kinds of pattern data, a significant deterioration of uneven gain and TOD and.6. was studied by using the eye diagram of the independent temperature control realization feasibility of tunable Brillouin MWP the filter is derived, Brillouin frequency shift and expressions of temperature; influence of temperature characteristics of optical fiber refractive index of the Brillouin frequency shift rate is calculated by theoretical derivation and experimental verification in detail, the linear correlation is Li proved that the refractive index and temperature of the fiber, and the fiber delay measurement technology, the rate of change of the experiment verify the delay caused by the refractive index of the 301~1275K wide temperature range, experimental data and the theoretical results are consistent; strain in certain circumstances, the theory is derived The relationship between the Brillouin frequency shift and the temperature change, for the standard single mode fiber, the Brillouin filter pass band can change with the temperature of 1.32MHz/ C.

【学位授予单位】：电子科技大学
【学位级别】：博士
【学位授予年份】：2016
【分类号】：TN248;TN713

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