基于共振耦合光子晶体多波长THz滤波器的研究
发布时间:2018-01-08 02:14
本文关键词:基于共振耦合光子晶体多波长THz滤波器的研究 出处:《南京邮电大学》2015年硕士论文 论文类型:学位论文
更多相关文章: 共振耦合 光子晶体 THz波 环形腔 滤波器
【摘要】:太赫兹波是频率范围为0.1-10THz的电磁波,它是很好的宽带信息载体,由于所处的特殊频段,它的方向性和穿透性在通信方面具有很大的潜力。光子晶体具有光子禁带和光子局域等特点,将光子晶体技术用于制作THz通信的关键器件THz滤波器具有重要意义。本文将光子晶体技术和THz技术相结合,提出一种基于共振耦合的光子晶体多波长THz滤波器。首先分析了基于共振耦合光子晶体THz波滤波器的基本原理,然后在此基础上设计了直波导和环形腔相结合的简单正方晶格光子晶体结构,接着,分析环形腔的不同结构对滤波器性能的影响。通过改变内部介质柱半径及其折射率,改变散射介质柱的半径等等,对不同波长的THz波进行滤波。经过优化,得到一种4×3内部介质柱,带有四个散射介质柱的光子晶体环形腔滤波器。最后,利用RSoft软件仿真分析了不同波长的THz信号入射时,滤波器的性能指标。仿真结果表明,简单正方晶格光子晶体的光子带隙宽度较大,对应的波长范围在65.265~88.613μm。该基于共振耦合的光子晶体多波长THz滤波器可以实现四个波长分别为82.086μm(频率为3.654THz)、83.168μm(频率为3.607THz)、84.457μm(频率为3.552THz)和85.601μm(频率为3.505THz)的窄带滤波,相应的频带宽度为:0.0017THz、0.0009THz、0.0016THz和0.0013THz。该滤波器的滤波效率几乎接近100%、插入损耗低于0.1dB,信道隔离度接近20dB,响应时间在2ns左右,滤波性能优良。该滤波器在未来的多波长THz通信领域中具有广泛的应用前景。
[Abstract]:The terahertz frequency range of 0.1-10THz electromagnetic wave, it is broadband information carrier is very good, because of the special frequency band, its direction and penetration has great potential in communication. The photonic crystal has a photonic band and photonic localization features, Guang Zijing technology has important significance for the key devices in THz filter THz communication. The photonic crystal technology combined with THz technology and proposes a photonic crystal resonant coupling multi wavelength filter based on THz. Firstly analyzes the basic principle of resonance coupling of photonic crystal THz wave filter based on, and then on the basis of the design of the combination of straight waveguide and ring resonator simple lattice photonic Affirmative the crystal structure, then the analysis of the influence of different structure of the ring cavity on the filter performance. By changing the internal dielectric radius and refractive index change, scattering medium column The radius and so on, to filter the THz wave with different wavelength. After optimization, a 4 * 3 medium inside the column, with four scattering medium column photonic crystal ring resonator filter. Finally, using RSoft software simulation of the THz signal in different incident wavelength, the performance of the filter. The simulation results show that the a simple Affirmative photonic lattice photonic crystal band gap width is larger, the corresponding wavelength in the range of 65.265~88.613 ~ M. of the photonic crystal resonant coupling multi wavelength THz filter can achieve four wavelengths were 82.086 m (based on the frequency of 3.654THz), 83.168 m (3.607THz), 84.457 m (3.552THz) and 85.601 M (frequency 3.505THz) narrowband filter, the frequency band width: 0.0017THz, 0.0009THz, 0.0016THz and 0.0013THz. filtering efficiency of the filter is nearly 100%, the insertion loss is less than 0.1dB, channel isolation It is close to 20dB, the response time is around 2ns, and the filtering performance is excellent. The filter has a wide application prospect in the future multi wavelength THz communication field.
【学位授予单位】:南京邮电大学
【学位级别】:硕士
【学位授予年份】:2015
【分类号】:TN713;O734
【共引文献】
相关硕士学位论文 前4条
1 单春霞;复合晶体的热特性及实验研究[D];山东师范大学;2011年
2 方敏;N_2O和N_2辉光放电的中红外激光光谱研究[D];华中师范大学;2011年
3 戈晓恒;基于组合谐振腔THz双波长滤波器的设计和性能分析[D];南京邮电大学;2014年
4 孙会;基于三重晶格光子晶体三波长THz滤波器的设计与性能分析[D];南京邮电大学;2014年
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