基于受激布里渊散射效应的微波光子滤波技术的研究
发布时间：2019-02-16 05:06
【摘要】：为满足光通信和无线接入网络相融合的需求,学者们将微波学和光学这两门学科之间的优势相互结合,便形成了一门新型交叉学科,将其称之为微波光子学。微波光子滤波器是微波光子学领域的一个重要分支,它是将微波信号调制到光域中进行光学处理,处理完的信号经过光电探测器转换为电信号,从而实现对所需频率信号的选择或抑制。微波光子滤波器的优点是滤波频段高、体积小、损耗低、成本小、抗电磁干扰强、宽带宽、低色散、高容量,可以实现一些电子微波滤波器所不能实现的功能。本论文基于受激布里渊散射研制了单通带微波光子滤波器和陷波滤波器。 本文介绍了微波光子滤波器发展现状和受激布里渊效应的应用,对SBS效应的理论进行分析,其中包括耦合波方程、布里渊增益谱、阈值,并对PM的传输特性、布里渊频移量进行了测试。 对基于相位调制器和受激布里渊散射效应的单通带微波光子滤波器系统进行了理论分析,研究了泵浦功率变化对带外抑制比的影响。搭建单通带微波光子滤波器实验测试系统,测试了频率调谐范围约为0.8-18.2GHz,3dB为26MHz,OOBR为26dB,研究了信号光功率和泵浦光功率变化对3dB带宽及带外抑制比的影响、以及偏振态对增益通带的影响。 基于DDMZM和SBS效应设计了宽调谐范围可调谐微波光子陷波滤波器,采用频率间隔为受激布里渊频移量2倍的两个泵浦信号,使陷波滤波器的频率调谐范围达到40GHz。对直流偏置电压引入的相位θ和受激布里渊散射增益系数G对陷波滤波器切口深度的影响进行仿真,结果表明陷波的切口深度随着相位θ的增大而增大,当θ=1.502π,切口深度为65dB,θ=1.510π,切口深度为60dB,随着G的增大而减小。
[Abstract]:In order to meet the demand of optical communication and wireless access network, the scholars combine the advantages of microwave and optics, and form a new cross-discipline, which is called microwave photonics. Microwave photonic filter is an important branch of microwave photonics. It modulates microwave signal into optical domain for optical processing. The processed signal is converted into electrical signal by photodetector. In order to achieve the desired frequency signal selection or suppression. The advantages of microwave photonic filter are high frequency band, small size, low loss, low cost, strong resistance to electromagnetic interference, wide band, low dispersion and high capacity, which can realize some functions which can not be realized by electronic microwave filter. In this paper, single pass band microwave photonic filters and notch filters are developed based on stimulated Brillouin scattering. This paper introduces the development of microwave photonic filter and the application of stimulated Brillouin effect, and analyzes the theory of SBS effect, including coupling wave equation, Brillouin gain spectrum, threshold, and the transmission characteristics of PM. Brillouin frequency shift was tested. The single-pass microwave photonic filter system based on phase modulator and stimulated Brillouin scattering is theoretically analyzed. The effect of pump power on the out-of-band rejection ratio is studied. A single pass band microwave photonic filter test system was built. The frequency tuning range was about 0.8-18.2 GHz ~ (2) dB and the frequency tuning range was 26MHz / OBR. The effects of signal power and pump power on 3dB bandwidth and out-of-band rejection ratio were studied. And the effect of polarization state on gain pass band. A tunable microwave photonic notch filter with wide tunable range is designed based on DDMZM and SBS effects. Two pump signals with a frequency interval of 2 times of the stimulated Brillouin frequency shift are used to make the tunable frequency range of the notch filter up to 40 GHz. The effect of phase 胃 and stimulated Brillouin scattering gain coefficient G on notch depth of notch filter is simulated. The results show that notch depth increases with increasing phase 胃, when 胃 = 1.502 蟺, The incision depth is 65 dB, 胃 = 1.510 蟺, and the incision depth is 60 dB, which decreases with the increase of G.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：O437.2;TN713
本文编号：2424079
[Abstract]:In order to meet the demand of optical communication and wireless access network, the scholars combine the advantages of microwave and optics, and form a new cross-discipline, which is called microwave photonics. Microwave photonic filter is an important branch of microwave photonics. It modulates microwave signal into optical domain for optical processing. The processed signal is converted into electrical signal by photodetector. In order to achieve the desired frequency signal selection or suppression. The advantages of microwave photonic filter are high frequency band, small size, low loss, low cost, strong resistance to electromagnetic interference, wide band, low dispersion and high capacity, which can realize some functions which can not be realized by electronic microwave filter. In this paper, single pass band microwave photonic filters and notch filters are developed based on stimulated Brillouin scattering. This paper introduces the development of microwave photonic filter and the application of stimulated Brillouin effect, and analyzes the theory of SBS effect, including coupling wave equation, Brillouin gain spectrum, threshold, and the transmission characteristics of PM. Brillouin frequency shift was tested. The single-pass microwave photonic filter system based on phase modulator and stimulated Brillouin scattering is theoretically analyzed. The effect of pump power on the out-of-band rejection ratio is studied. A single pass band microwave photonic filter test system was built. The frequency tuning range was about 0.8-18.2 GHz ~ (2) dB and the frequency tuning range was 26MHz / OBR. The effects of signal power and pump power on 3dB bandwidth and out-of-band rejection ratio were studied. And the effect of polarization state on gain pass band. A tunable microwave photonic notch filter with wide tunable range is designed based on DDMZM and SBS effects. Two pump signals with a frequency interval of 2 times of the stimulated Brillouin frequency shift are used to make the tunable frequency range of the notch filter up to 40 GHz. The effect of phase 胃 and stimulated Brillouin scattering gain coefficient G on notch depth of notch filter is simulated. The results show that notch depth increases with increasing phase 胃, when 胃 = 1.502 蟺, The incision depth is 65 dB, 胃 = 1.510 蟺, and the incision depth is 60 dB, which decreases with the increase of G.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：O437.2;TN713
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相关期刊论文 前3条
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3 周波;张汉一;郑小平;陈锐;;微波光子学发展动态[J];激光与红外;2006年02期
，本文编号：2424079
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