用于微波光子信息处理及光通信的光滤波器研究

	用于微波光子信息处理及光通信的光滤波器研究
	赵海洋
学位类型	硕士
导师	杨林
	2017-05-27
学位授予单位	中国科学院大学
学位授予地点	北京
学位专业	电子与通信工程
关键词	可重构光分插复用器微波光子学可调谐光滤波器微环谐振器
其他摘要	光滤波器是微波光子信息处理系统及下一代灵活光网络的关键功能器件。微波光子信息处理要求光滤波器具备窄带宽、高滚降、低插损、通带平坦等特性。可重构光分插复用（ROADM）系统是下一代灵活光网络的重要组成部分，为满足其在波长无关性、方向无关性和无冲突性等方面的需求，要求光滤波器具有中心波长与带宽可调谐的功能。本文对多种耦合结构中的光传输过程进行了电磁场数值模拟，利用散射矩阵模型对微环谐振器加以建模分析，从而确定了波导几何参数与微环谐振器滤波性能的关系。在此基础上，提出了利用多级二阶结构实现具有高滚降速度的微波光子滤波器方案。与同等微环数目的串联结构相对比，可以确定该级联方案不仅能够实现与之相似的良好性能，而且为实际应用提供了便利。另外，本文提出利用“错位对准”法实现带宽可调光滤波器的设计方案，并借助游标效应大幅拓展了滤波谱线的自由光谱范围。在理论分析的基础上，考虑工艺误差，绘制了包括多种参数组合的芯片版图，并利用深紫外光刻工艺进行了加工。针对上述两种结构的实测结果表明，用于微波光子信息处理的五级二阶光滤波器可以实现约5 dB/GHz的滚降速度，3 dB带宽约17 GHz。用于光通信的可调谐光滤波器可实现3 dB带宽60 GHz至110 GHz连续可调，且在1510 nm至1580 nm范围内只存在单一通带。; Optical filter is the key functional device of microwave photonic information processing system and next-generation flexible optical networks. Microwave photonic information processing system requires that optical filters have such characteristics as narrow bandwidth, fast rolling-off slope, low insertion loss, flat passband and so on. Reconfigurable optical add-drop multiplexer (ROADM) system is one of the important components of next-generation flexible optical networks. In order to meet the requirements of ROADM system, such as colorless, directionless and contentionless characteristics, the central wavelength and bandwidth tuning abilities are also significant criteria to evaluate the performances of optical filters.In this paper, we completed the numerical simulation of the electromagnetic field in the optical transmission processes in different coupling structures, and the scattering matrix model is used to analyze the micro-ring resonators. We have successfully figured out the relationship between the geometric parameters of the waveguides and the characteristics of the micro-ring resonator filter. According to the above analyses, a new scheme of microwave photonic filter with fast rolling-off slope is proposed, which is based on the multistage second-order structure. Compared with single-stage high-order optical filters with the same number of MRs, the demonstrated structure can not only achieve comparable performances, but also provide great convenience for practical applications. Meanwhile, this paper presents a design scheme of bandwidth tunable optical filters with the method of misalignment, and large free spectral range can be simultaneously achieved with Vernier effect. On the basis of theoretical analyses, with the fabrication errors taken into consideration, the chip layout including various parameter combinations is drawn and processed by deep UV lithography. The measured results of the above two designed structures show that the five-stage second-order optical filters for microwave photonic information processing can achieve a fast rolling-off slope of about 5 dB/GHz, and maintain the 3-dB bandwidth of about 17 GHz. In the aspect of tunable optical filters for optical communications, the 3-dB bandwidth can be continuously tuned from 60 GHz to 110 GHz, and there is only one passband in the wavelengths ranging from 1510 nm to 1580 nm.
学科领域	光电子学
语种	中文
公开日期	2017-06-02
文献类型	学位论文
条目标识符	http://ir.semi.ac.cn/handle/172111/28193
专题	集成光电子学国家重点实验室
推荐引用方式 GB/T 7714	赵海洋. 用于微波光子信息处理及光通信的光滤波器研究[D]. 北京. 中国科学院大学,2017.

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