基于光子晶体光纤的可调谐微波光子滤波器研究

发布时间：2018-03-21 18:02

本文选题：微波光子滤波器　切入点：光子晶体光纤　出处：《天津理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：微波光子学将微波技术和光子学相融合,并结合两大学科优势,具有广阔的应用前景。克服了传统电子滤波器在电域中处理射频信号存在的瓶颈问题,具有高带宽、低损耗、体积小和抗电磁干扰等优点,被广泛的应用于通信领域。本论文主要研究了基于光子晶体光纤的可调谐微波光子滤波器,主要内容及工作如下:(1)介绍了微波光子滤波器的基本原理及其应用,根据不同特点对微波光子滤波器进行了归类,总结概括了微波光子滤波器近几年来的研究近况。(2)论述了微波光子滤波器的基本原理,理论分析了相位调制型微波光子滤波器的基本原理,探讨了可调谐微波光子滤波器的设计方法和光子晶体光纤在微波光子滤波器中的应用。(3)提出了一种基于高双折射光子晶体光纤与光栅对的微波光子滤波器,以多波长光纤激光器作光源,通过改变填充温敏液体的高双折射光子晶体光纤(HB-PCF)周围温度,使HB-PCF具有不同的双折射。随着HB-PCF双折射率的连续变化,激光器输出了不同波长间隔的激光,使微波光子滤波器具有不同的自由频谱范围。通过引入单模光纤与光栅对级联,提高了滤波器的频率选择性。(4)提出了一种基于高双折射光子晶体光纤与光纤环的超宽带可调谐微波光子滤波器,通过改变填充温敏液体的HB-PCF的温度,使其具有不同的双折射。随着HB-PCF双折射率的连续变化,激光器输出了不同波长间隔的激光,使微波光子滤波器具有不同的自由频谱范围。通过引入光纤环,提升了滤波器的频率选择性。(5)提出了一种基于高双折射光子晶体光纤延时单元的可调谐微波光子滤波器。延时单元以一段填充了温敏液体的高双折射光子晶体光纤为延时器件。通过改变填充温敏液体的高双折射光子晶体光纤的周围温度,使高双折射光子晶体光纤具有不同的双折射系数,使得分别沿高双折射光子晶体光纤快慢轴传输的信号光间的延时差发生改变,从而使滤波器获得了不同的自由频谱范围。
[Abstract]:Microwave photonics combines microwave technology with photonics and combines the advantages of the two disciplines. It has a broad application prospect. It overcomes the bottleneck problem of the traditional electronic filter processing RF signal in the electric domain, and has high bandwidth and low loss. In this paper, tunable microwave photonic filter based on photonic crystal fiber is studied. The main contents and work are as follows: (1) the basic principle and application of microwave photonic filter are introduced, and the microwave photonic filter is classified according to different characteristics. The basic principle of microwave photonic filter is discussed, and the basic principle of phase modulated microwave photonic filter is analyzed theoretically. The design method of tunable microwave photonic filter and the application of photonic crystal fiber in microwave photonic filter are discussed. A microwave photonic filter based on high birefringence photonic crystal fiber and grating pair is proposed. By changing the ambient temperature of high birefringence photonic crystal fiber (HB-PCF) filled with temperature-sensitive liquid, the HB-PCF has different birefringence with the continuous change of HB-PCF birefringence, using multi-wavelength fiber laser as light source. The laser outputs laser with different wavelength intervals, which makes the microwave photonic filter have different free spectrum range. This paper presents an ultra-wideband tunable microwave photonic filter based on high birefringence photonic crystal fiber and fiber ring. By changing the temperature of the HB-PCF filled with the temperature sensitive liquid, a tunable microwave photonic filter is proposed. With the continuous variation of HB-PCF birefringence, the laser outputs laser with different wavelength intervals, which makes the microwave photonic filter have different free spectrum range. A tunable microwave photonic filter based on high birefringence photonic crystal fiber delay unit is proposed. The delay unit is filled with a section of high birefringence photonic crystal light filled with a temperature sensitive liquid. The fiber is a delay device. By changing the ambient temperature of a highly birefringent photonic crystal fiber filled with a temperature-sensitive liquid, The high birefringence photonic crystal fiber has different birefringence coefficient, which makes the delay difference between signals propagating along the fast and slow axis of high birefringence photonic crystal fiber to change, thus making the filter obtain different free spectrum range.
【学位授予单位】：天津理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN713

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